期刊文献+
共找到81,307篇文章
< 1 2 250 >
每页显示 20 50 100
Weak Co-AB-context for G_(C)-χ-injective Modules
1
作者 YANG Qiang 《数学进展》 北大核心 2026年第1期103-119,共17页
In this paper,we introduce the notion of G_(C)-X-injective modules,where X denotes a class of left S-modules and C represents a faithfully semidualizing bimodule.Under the condition that X satisfies certain hypotheses... In this paper,we introduce the notion of G_(C)-X-injective modules,where X denotes a class of left S-modules and C represents a faithfully semidualizing bimodule.Under the condition that X satisfies certain hypotheses,some properties and some equivalent characterizations of G_(C)-X-injective modules are investigated,and we also show that the triple(■,cores■,■)is a weak co-AB-context.As an application,two complete cotorsion pairs and a new model structure in Mod S are given. 展开更多
关键词 C-X-injective module G_(C)-X-injective module cotorsion pair weak co-ABcontext
原文传递
Stableδ-FA(Cs)PbI_(3)intermediate enables fabrication of large-area perovskite solar modules in ambient air
2
作者 Chenyang Duan Ke Xiao +12 位作者 Yinke Wang Ye Liu Yameen Ahmed Zhentao Pang Wenjun Zhan Hongfei Sun Han Gao Haowen Luo Yuhong Zhang Xin Luo Yu Deng Makhsud I.Saidaminov Hairen Tan 《Science China Materials》 2026年第3期1456-1463,共8页
Fabrication of large-area perovskite solar modules under ambient air conditions remains a critical challenge due to air sensitivity of perovskite intermediate phases during crystallization.Here,we introduce 2-iodoimid... Fabrication of large-area perovskite solar modules under ambient air conditions remains a critical challenge due to air sensitivity of perovskite intermediate phases during crystallization.Here,we introduce 2-iodoimidazole(IIZ)into the perovskite precursor,enabling the formation of an air-stable pureδ-phase intermediate,which,upon annealing,fully transforms into a highly orientedα-phase perovskite film with reduced defects and variability.Leveraging this approach,we achieve a stabilized power conversion efficiency of 20.9%for 927.5 cm^(2)perovskite solar modules with high reproducibility.The encapsulated modules meet stringent international photovoltaic testing standards(IEC61215:2021),demonstrating excellent stability under continuous operation,thermal cycling(-40 to 85℃)and damp heat(85℃ and 85%relative humidity). 展开更多
关键词 perovskite solar modules intermediate phases ambient fabrication scalable fabrication stability
原文传递
微课驱动小学生英语自主学习能力提升的探究——以Module 5 Unit 9 Where will you go?第一课时自主学习为例
3
作者 张兴 《视周刊》 2026年第1期34-35,共2页
一、微课设计:从知识传递到认知建构的范式转变1.微课定义微课是一种以短小精悍的数字视频为主要载体,围绕某个知识点、教学环节或特定教学主题而设计的结构化、情境化教学资源。其时长通常在5-10分钟之间,内容高度聚焦,重点突出,针对性... 一、微课设计:从知识传递到认知建构的范式转变1.微课定义微课是一种以短小精悍的数字视频为主要载体,围绕某个知识点、教学环节或特定教学主题而设计的结构化、情境化教学资源。其时长通常在5-10分钟之间,内容高度聚焦,重点突出,针对性强,符合学生的认知负荷与注意力特点,旨在通过精炼的内容和生动的呈现方式,激发学生学习兴趣,支持个性化、碎片化学习,促进自主探究与合作交流,是现代教育信息化背景下一种重要的教学辅助手段与课程资源形态。 展开更多
关键词 英语 module 5 Unit 9 能力提升 自主学习 微课
原文传递
An RMD-YOLOv11 Approach for Typical Defect Detection of PV Modules
4
作者 Tao Geng Shuaibing Li +3 位作者 Yunyun Yun Yongqiang Kang Hongwei Li unmin Zhu 《Computers, Materials & Continua》 2026年第3期1804-1822,共19页
In order to address the challenges posed by complex background interference,high miss-detection rates of micro-scale defects,and limited model deployment efficiency in photovoltaic(PV)module defect detection,this pape... In order to address the challenges posed by complex background interference,high miss-detection rates of micro-scale defects,and limited model deployment efficiency in photovoltaic(PV)module defect detection,this paper proposes an efficient detection framework based on an improved YOLOv11 architecture.First,a Re-parameterized Convolution(RepConv)module is integrated into the backbone to enhance the model’s sensitivity to fine-grained defects—such as micro-cracks and hot spots—while maintaining high inference efficiency.Second,a Multi-Scale Feature Fusion Convolutional Block Attention Mechanism(MSFF-CBAM)is designed to guide the network toward critical defect regions by jointly modeling channel-wise and spatial attention.This mechanism effectively strengthens the specificity and robustness of feature representations.Third,a lightweight Dynamic Sampling Module(DySample)is employed to replace conventional upsampling operations,thereby improving the localization accuracy of small-scale defect targets.Experimental evaluations conducted on the PVEL-AD dataset demonstrate that the proposed RMDYOLOv11 model surpasses the baseline YOLOv11 in terms of mean Average Precision(mAP)@0.5,Precision,and Recall,achieving respective improvements of 4.70%,1.51%,and 5.50%.The model also exhibits notable advantages in inference speed and model compactness.Further validation on the ELPV dataset confirms the model’s generalization capability,showing respective performance gains of 1.99%,2.28%,and 1.45%across the same metrics.Overall,the enhanced model significantly improves the accuracy of micro-defect identification on PV module surfaces,effectively reducing both false negatives and false positives.This advancement provides a robust and reliable technical foundation for automated PV module defect detection. 展开更多
关键词 Photovoltaic(PV)modules YOLOv11 re-parameterization convolution attention mechanism dynamic upsampling
在线阅读 下载PDF
Modulating interphasial chemistry through PEI/PI separator coating for thermally robust high-voltage batteries
5
作者 Shuofeng Jian Jiahui Zeng +6 位作者 Chen Guo Zhaohuang Zhan Yumeng Lan Zu-Wei Yin Hai Lin Luyi Yang Feng Pan 《Energy Materials and Devices》 2025年第4期54-66,共13页
Lithium-ion batteries are essential for modern energy storage,yet achieving simultaneous high-temperature and high-voltage operation remains challenging due to interfacial compatibility.In this study,we introduce a po... Lithium-ion batteries are essential for modern energy storage,yet achieving simultaneous high-temperature and high-voltage operation remains challenging due to interfacial compatibility.In this study,we introduce a polyetherimide(PEI)-polyimide(PI)functional coating on the separator that enhances wettability,thermal stability,and mechanical strength,while markedly improving cathode stability under harsh conditions.By integrating theoretical calculations with experimental validation,we demonstrate that the PEI/PI coating modulates the solvation structure of lithium-ions,thereby facilitating the interfacial desolvation process.More importantly,the PEI/PI layer regulates electrolyte decomposition at the interface,promoting the formation of a uniform and thermally stable cathode-electrolyte interphase.Consequently,LiCoO_(2)cathodes exhibit improved cycling performance at 60°C.Overall,this work underscores the pivotal role of separator coatings in governing interfacial chemistry and provides a viable strategy for designing high-performance lithium-ion batteries capable of enduring both high temperatures and high. 展开更多
关键词 high-voltage batteries high-temperature performance SEPARATORS interfacial solvation structure cathode-electrolyte interphase
在线阅读 下载PDF
Remaining Life Prediction Method for Photovoltaic Modules Based on Two-Stage Wiener Process 被引量:1
6
作者 Jie Lin Hongchi Shen +1 位作者 Tingting Pei Yan Wu 《Energy Engineering》 EI 2025年第1期331-347,共17页
Photovoltaic (PV) modules, as essential components of solar power generation systems, significantly influence unitpower generation costs.The service life of these modules directly affects these costs. Over time, the p... Photovoltaic (PV) modules, as essential components of solar power generation systems, significantly influence unitpower generation costs.The service life of these modules directly affects these costs. Over time, the performanceof PV modules gradually declines due to internal degradation and external environmental factors.This cumulativedegradation impacts the overall reliability of photovoltaic power generation. This study addresses the complexdegradation process of PV modules by developing a two-stage Wiener process model. This approach accountsfor the distinct phases of degradation resulting from module aging and environmental influences. A powerdegradation model based on the two-stage Wiener process is constructed to describe individual differences inmodule degradation processes. To estimate the model parameters, a combination of the Expectation-Maximization(EM) algorithm and the Bayesian method is employed. Furthermore, the Schwarz Information Criterion (SIC) isutilized to identify critical change points in PV module degradation trajectories. To validate the universality andeffectiveness of the proposed method, a comparative analysis is conducted against other established life predictiontechniques for PV modules. 展开更多
关键词 Photovoltaic modules DEGRADATION stochastic processes lifetime prediction
在线阅读 下载PDF
Mini review:Strategies for enhancing stability of high-voltage cathode materials in aqueous zinc-ion batteries 被引量:2
7
作者 Lingjiang Kou Yong Wang +5 位作者 Jiajia Song Taotao Ai Wenhu Li Mohammad Yeganeh Ghotbi Panya Wattanapaphawong Koji Kajiyoshi 《Chinese Chemical Letters》 2025年第1期214-224,共11页
As battery technology evolves and demand for efficient energy storage solutions,aqueous zinc ion batteries(AZIBs)have garnered significant attention due to their safety and environmental benefits.However,the stability... As battery technology evolves and demand for efficient energy storage solutions,aqueous zinc ion batteries(AZIBs)have garnered significant attention due to their safety and environmental benefits.However,the stability of cathode materials under high-voltage conditions remains a critical challenge in improving its energy density.This review systematically explores the failure mechanisms of high-voltage cathode materials in AZIBs,including hydrogen evolution reaction,phase transformation and dissolution phenomena.To address these challenges,we propose a range of advanced strategies aimed at improving the stability of cathode materials.These strategies include surface coating and doping techniques designed to fortify the surface properties and structure integrity of the cathode materials under high-voltage conditions.Additionally,we emphasize the importance of designing antioxidant electrolytes,with a focus on understanding and optimizing electrolyte decomposition mechanisms.The review also highlights the significance of modifying conductive agents and employing innovative separators to further enhance the stability of AZIBs.By integrating these cutting-edge approaches,this review anticipates substantial advancements in the stability of high-voltage cathode materials,paving the way for the broader application and development of AZIBs in energy storage. 展开更多
关键词 Aqueous zinc ion battery high-voltage cathode materials Stability enhancement Failure mechanisms Electrolyte optimization
原文传递
Accelerating lithium ion conduction via activated interfacial dipole layer for long-life and high-voltage solid-state lithium-metal battery 被引量:1
8
作者 Lv Xu Meng Yao +7 位作者 Liyu Du Yong Chen Yanqiang Wei Du Yuan Hao Wu Haitao Zhang Yun Zhang Guoxiu Wang 《Journal of Energy Chemistry》 2025年第9期92-100,I0004,共10页
The absence of efficient ion transport pathways in composite solid-state electrolytes(CSEs)usually results in low ionic conductivity,which remains a great challenge for developing solid-state lithiummetal batteries(SL... The absence of efficient ion transport pathways in composite solid-state electrolytes(CSEs)usually results in low ionic conductivity,which remains a great challenge for developing solid-state lithiummetal batteries(SLMBs).Herein,we report achieving accelerated Li^(+)conduction in CSEs by a novel activation of the interfacial dipole layer.Polycationic ionic liquids and polyacrylonitrile with highly polar functional groups(-C≡N)are utilized to modulate the interfacial dipole layer in MOF-based CSEs,facilitating long-range pathways for the connectivity of Li^(+)conduction and enhancing rapid transport kinetics.The as-synthesized CSEs exhibit a high ionic conductivity of 0.59 mS cm^(-1)and a lithium transfer number of 0.85.The assembled SLMBs(Li/CSE/LiNi_(0.9)Co_(0.05)Mn_(0.05)O_(2))delivered a high-capacity retention of 88.7%with a minimal discharge voltage attenuation of 17.1 mV after 500 cycles(0.03 mV per cycle)at0.5 C.This work offers an effective approach to creating interpenetrating lithium-ion transport pathways with rapid ion transport kinetics for solid-state electrolytes,thereby advancing the development of solidstate lithium metal batteries. 展开更多
关键词 Interfacial dipole layer high-voltage lithium-metal battery Composite solid electrolyte Lithium-ion conduction channels
在线阅读 下载PDF
A review of encapsulation methods and geometric improvements of perovskite solar cells and modules for mass production and commercialization 被引量:1
9
作者 Wending Yang Yubo Zhang +2 位作者 Chengchao Xiao Jingxuan Yang Tailong Shi 《Nano Materials Science》 2025年第6期790-809,共20页
Owing to the outstanding optoelectronic properties of perovskite materials,perovskite solar cells(PSCs)have been widely studied by academic organizations and industry corporations,with great potential to become the ne... Owing to the outstanding optoelectronic properties of perovskite materials,perovskite solar cells(PSCs)have been widely studied by academic organizations and industry corporations,with great potential to become the next-generation commercial solar cells.However,critical challenges remain in preserving high efficiency practical large-scale commercialized PSCs:a)the long-term stability of the cell materials and devices,b)lead leakage,and c)methods to scale the cells for larger area applications.This paper summarizes the prior-art strategies to address the above challenges,including the latest studies on the traditional glass-glass and thin-film encapsulation methods to better improve the reliability of PSCs,new technologies for preventing lead leakage,and geometric improvement strategies to enhance the reliability,efficiency,and performance of perovskite solar modules(PSMs).Through these strategies,the device achieved enhanced performance in long-term stability tests.The encapsulation resulted in a high lead leakage inhibition rate of up to 99%,and the PSMs possessed a geometric fill factor of 99.6%and a power conversion efficiency(PCE)of 20.7%.The dramatic improvement of efficiency and reliability of perovskite solar cells and modules indicate the great potential for mass production and commer-cialization of perovskite solar applications in the near future. 展开更多
关键词 Perovskite solar modules ENCAPSULATION Geometric improvement Stability COMMERCIALIZATION
在线阅读 下载PDF
Design of a high-voltage radiation-tolerant driver with a novel comparator and drain-surrounding-source structure 被引量:1
10
作者 Wei Huang Hong-Xia Liu Xing-Guo Gao 《Nuclear Science and Techniques》 2025年第7期34-43,共10页
This article introduces a novel 20 V radiation-hardened high-voltage metal-oxide-semiconductor field-effect transistor(MOSFET)driver with an optimized input circuit and a drain-surrounding-source(DSS)structure.The inp... This article introduces a novel 20 V radiation-hardened high-voltage metal-oxide-semiconductor field-effect transistor(MOSFET)driver with an optimized input circuit and a drain-surrounding-source(DSS)structure.The input circuit of a conventional inverter consists of a thick-gate-oxide n-type MOSFET(NMOS).These conventional drivers can tolerate a total ionizing dose(TID)of up to 100 krad(Si).In contrast,the proposed comparator input circuit uses both a thick-gate-oxide p-type MOSFET(PMOS)and thin-gate-oxide NMOS to offer a high input voltage and higher TID tolerance.Because the thick-gate-oxide PMOS and thin-gate-oxide NMOS collectively provide better TID tolerance than the thick-gate-oxide NMOS,the circuit exhibits enhanced TID tolerance of>300 krad(Si).Simulations and experimental date indicate that the DSS structure reduces the probability of unwanted parasitic bipolar junction transistor activation,yielding a better single-event effect tolerance of over 81.8 MeVcm^(2)mg^(-1).The innovative strategy proposed in this study involves circuit and layout design optimization,and does not require any specialized process flow.Hence,the proposed circuit can be manufactured using common commercial 0.35μm BCD processes. 展开更多
关键词 Total ionizing dose(TID) Single-event burnout(SEB) high-voltage driver Comparator input unit Drain-surrounding-source ring structure
在线阅读 下载PDF
Melting plus reactive wetting of solid acid enabling stable high-voltage cycling of layered oxide cathodes for sodium-ion batteries 被引量:1
11
作者 Debin Ye Guohu Chen +4 位作者 Junzhou Xie Chunliu Li Dan Liang Wenwei Wu Xuehang Wu 《Journal of Energy Chemistry》 2025年第6期252-260,I0007,共10页
Expanding the cutoff voltage of layered oxide cathodes for sodium-ion batteries(SIBs)is crucial for overcoming their existing energy density limitations.However,cationic/anodic redox-triggered multiple phase transitio... Expanding the cutoff voltage of layered oxide cathodes for sodium-ion batteries(SIBs)is crucial for overcoming their existing energy density limitations.However,cationic/anodic redox-triggered multiple phase transitions and unfavorable interfacial side reactions accelerate capacity and voltage decay.Herein,we present a straightforward melting plus reactive wetting strategy using H_(3)BO_(3)for surface modification of O_(3)-type Na_(0.9)Cu_(0.12)Ni_(0.33)Mn_(0.4)Ti_(0.15)O_(2)(CNMT).The transformation of H_(3)BO_(3)from solid to liquid under mild heating facilitates the uniform dispersion and complete surface coverage of CNMT particles.By neutralizing the residual alkali and extracting Na^(+)from the CNMT lattice,H_(3)BO_(3)forms a multifunctional Na_(2)B_(2)O_(5)-dominated layer on the CNMT surface.This Na_(x)B_(y)O_(z)(NBO)layer plays a positive role in providing low-barrier Na^(+)transport channels,suppressing phase transitions,and minimizing the generation of O_(2)/CO_(2)gases and resistive byproducts.As a result,at a charge cutoff voltage of 4.5 V,the NBO-coated CNMT delivers a high discharge capacity of 149,1 mAh g^(-1)at 10 mA g^(-1)and exhibits excellent cycling stability at 100 mA g^(-1)over 200 cycles with a higher capacity retention than that of pristine CNMT(86,4%vs,62.1%).This study highlights the effectiveness of surface modification using lowmelting-point solid acids,with potential applications for other layered oxide cathode materials to achieve stable high-voltage cycling.This proposed strategy opens new avenues for the construction of highquality coatings for high-voltage layered oxide cathodes in SIBs. 展开更多
关键词 Sodium-ion batteries O_(3)-type layered oxide Solid H_(3)BO_(3) Surface modification high-voltage stability
在线阅读 下载PDF
High-Voltage Solid-State Lithium Batteries: A Review of Electrolyte Design, Interface Engineering, and Future Perspectives
12
作者 Cheng Yang Zi-Xin Liang +3 位作者 Ming-Yun Zhang Ming-Zhe Chen Kai Zhang Li-Min Zhou 《电化学(中英文)》 北大核心 2025年第10期56-83,共28页
Solid-state lithium batteries have become a research hotspot in the field of large-scale energy storage due to their excellent safety performance.The development of high-voltage positive electrode materials matched wi... Solid-state lithium batteries have become a research hotspot in the field of large-scale energy storage due to their excellent safety performance.The development of high-voltage positive electrode materials matched with lithium metal anode have advanced the energy density of solid-state lithium batteries close to or even exceeding that of lithium batteries based on a liquid electrolyte,which is expected to be commercialized in the future.However,in high voltage conditions(>4.3 V),the decomposition of electrolyte components,structural degradation,and interface side reactions significantly reduce battery performance and hinder its further development.This review summarizes the latest research progress of inorganic electrolytes,polymer electrolytes,and composite electrolytes in high-voltage solid-state lithium batteries.At the same time,the designs of high-voltage polymer gel electrolyte and high-voltage quasi solid-state electrolyte are introduced in detail.In addition,interface engineering is crucial for improving the overall performance of high-voltage solid-state batteries.Finally,we highlight the challenges faced by high-voltage solid-state lithium batteries and put forward our own views on future research directions.This review offers instructive insights into the advancement of high-voltage solid-state lithium batteries for large-scale energy storage applications. 展开更多
关键词 Solid-state lithium batteries high-voltage Solid-state electrolyte Interface engineering
在线阅读 下载PDF
Tuning surface functional groups and crystallinity in activated carbon for high-voltage lithium-ion capacitors
13
作者 AN Ya-bin SUN Yu +5 位作者 ZHANG Ke-liang LI Chen SUN Xian-zhong WANG Kai ZHANG Xiong MA Yan-wei 《新型炭材料(中英文)》 北大核心 2025年第5期1085-1097,I0019-I0021,共16页
Lithium-ion capacitors(LICs)combine the high power dens-ity of electrical double-layer capacitors with the high energy density of lithium-ion batteries.However,they face practical limitations due to the narrow operati... Lithium-ion capacitors(LICs)combine the high power dens-ity of electrical double-layer capacitors with the high energy density of lithium-ion batteries.However,they face practical limitations due to the narrow operating voltage window of their activated carbon(AC)cathodes.We report a scalable thermal treatment strategy to develop high-voltage-tolerant AC cathodes.Through controlled thermal treatment of commer-cial activated carbon(Raw-AC)under a H_(2)/Ar atmosphere at 400-800℃,the targeted reduction of degradation-prone functional groups can be achieved while preserving the critical pore structure and increasing graph-itic microcrystalline ordering.The AC treated at 400℃(HAC-400)had a significant increase in specific capacity(96.0 vs.75.1 mAh/g at 0.05 A/g)and better rate capability(61.1 vs.36.1 mAh/g at 5 A/g)in half-cell LICs,along with an 83.5%capacity retention over 7400 cycles within an extended voltage range of 2.0-4.2 V in full-cell LICs.Scalability was demonstrated by a 120 g batch production,enabling fabrication of pouch-type LICs with commercial hard carbon anodes that delivered a higher energy density of 28.3 Wh/kg at 1 C,and a peak power density of 12.1 kW/kg compared to devices using raw AC.This simple,industry-compatible approach may be used for producing ad-vanced cathode materials for practical high-performance LICs. 展开更多
关键词 Activated carbon Lithium-ion capacitors Surface functional groups Microcrystalline domains high-voltage cathod
在线阅读 下载PDF
EL-DenseNet:Mushroom Recognition Based on Erasing Module Using DenseNet
14
作者 WANG Yaojun ZHAO Weiting +1 位作者 BIE Yuhui JIA Lu 《农业机械学报》 北大核心 2025年第9期628-637,共10页
Target occlusion poses a significant challenge in computer vision,particularly in agricultural applications,where occlusion of crops can obscure key features and impair the model’s recognition performance.To address ... Target occlusion poses a significant challenge in computer vision,particularly in agricultural applications,where occlusion of crops can obscure key features and impair the model’s recognition performance.To address this challenge,a mushroom recognition method was proposed based on an erase module integrated into the EL-DenseNet model.EL-DenseNet,an extension of DenseNet,incorporated an erase attention module designed to enhance sensitivity to visible features.The erase module helped eliminate complex backgrounds and irrelevant information,allowing the mushroom body to be preserved and increasing recognition accuracy in cluttered environments.Considering the difficulty in distinguishing similar mushroom species,label smoothing regularization was employed to mitigate mislabeling errors that commonly arose from human observers.This strategy converted hard labels into soft labels during training,reducing the model’s overreliance on noisy labels and improving its generalization ability.Experimental results showed that the proposed EL-DenseNet,when combined with transfer learning,achieved a recognition accuracy of 96.7%for mushrooms in occluded and complex backgrounds.Compared with the original DenseNet and other classic models,this approach demonstrated superior accuracy and robustness,providing a promising solution for intelligent mushroom recognition. 展开更多
关键词 mushroom recognition erase module label smoothing DenseNet
在线阅读 下载PDF
The in-situ growth of Cu_(2)O–CuO on Cu foam coated with carbon derived from polydopamine as the flexible high-voltage cathode for thermal batteries
15
作者 Xin-ya Bu Yan-li Zhu +4 位作者 Ting Quan Bin-chao Shi Shu Zhang Xiao-yu Wei Qi Xia 《Green Energy & Environment》 2025年第9期1922-1933,共12页
Thermal batteries are a type of thermally activated reserve battery,where the cathode material significantly influences the operating voltage and specific capacity.In this work,Cu_(2)O–CuO nanowires are prepared by i... Thermal batteries are a type of thermally activated reserve battery,where the cathode material significantly influences the operating voltage and specific capacity.In this work,Cu_(2)O–CuO nanowires are prepared by in-situ thermal oxidation method onto Cu foam,which are further coated with a carbon layer derived from polydopamine(PDA).The morphology of the nanowires has been examined using scanning electron microscopy(SEM)and transmission electron microscopy(TEM).The material shows a kind of core–shell structure,with CuO as the shell and Cu_(2)O as the core.To further explore the interaction between the material and lithium-ion(Li^(+)),the Lit adsorption energies of CuO and Cu_(2)O were calculated,revealing a stronger affinity of Li^(+) for CuO.The unique core–shell nanowire structure of Cu_(2)O–CuO can provide a good Li^(+)adsorption with the outer layer CuO and excellent structural stability with the inner layer Cu_(2)O.When applied in thermal batteries,Cu_(2)O–CuO–C nanowires exhibit specific capacity and specific energy of 326 mAh g^(-1)and 697 Wh kg^(-1)at a cut-off voltage of 1.5 V both of which are higher than those of Cu_(2)O–CuO(238 mAh g^(-1)and 445 Wh kg^(-1)).The discharge process includes the insertion of lithium ions and subsequent reduction reactions,ultimately resulting in the formation of lithium oxide and copper. 展开更多
关键词 high-voltage CuO nanowires PDA CATHODE Thermal battery
在线阅读 下载PDF
Standardized Research on High-Voltage Safety of Drive Motor Systems
16
作者 Bowen Yin Hang Sun +1 位作者 Yue Fu Hui Rong 《Journal of Electronic Research and Application》 2025年第3期1-9,共9页
This paper focuses on the high-voltage safety of drive motor systems in new energy vehicles and conducts standardized research on functional safety design in the concept phase. In view of the lack of high-voltage haza... This paper focuses on the high-voltage safety of drive motor systems in new energy vehicles and conducts standardized research on functional safety design in the concept phase. In view of the lack of high-voltage hazard analysis for drive motor systems in existing standards, based on theories such as GB/T 34590 and ISO 26262, the safety levels are deeply analyzed. The HAZOP method is innovatively used, and 16 types of guidewords are combined to comprehensively analyze the system functions, identifying vehicle hazards such as high-voltage electric shock caused by functional abnormalities, including high-voltage interlock function failure and abnormal active discharge. Subsequently, safety goals such as preventing high-voltage electric shock are set, functional safety requirements such as accurately obtaining collision signals and timely discharging high-voltage electricity are formulated, and requirements for external signal sources and other technologies are clearly defined, constructing a complete high-voltage safety protection system. The research results provide important technical support and standardized references for the high-voltage safety functional design of drive motor systems in new energy vehicles, and are of great significance for improving the high-voltage safety level of the new energy vehicle industry, expecting to play a key role in subsequent product development and standard improvement. 展开更多
关键词 Drive motor system high-voltage safety Functional safety design HAZOP method
在线阅读 下载PDF
Recent fluorination strategies in solid electrolytes for high-voltage solid-state lithium-ion batteries
17
作者 An-Chun Tang Er-Hai Hu +5 位作者 Bei-Er Jia Chu-Bin Wan Zi-Yue Wen Shuen Tso Xin Ju Qing-Yu Yan 《Rare Metals》 2025年第4期2268-2293,共26页
High-voltage solid-state lithium-ion batteries(SSLIBs)have attracted considerable research attention in recent years due to their high-energy-density and superior safety characteristics.However,the integration of high... High-voltage solid-state lithium-ion batteries(SSLIBs)have attracted considerable research attention in recent years due to their high-energy-density and superior safety characteristics.However,the integration of high-voltage cathodes with solid electrolytes(SEs)presents multiple challenges,including the formation of high-impedance layers from spontaneous chemical reactions,electrochemical instability,insufficient interfacial contact,and lattice expansion.These issues significantly impair battery performance and potentially lead to battery failure,thus impeding the commercialization of high-voltage SSLIBs.The incorporation of fluorides,known for their robust bond strength and high free energy of formation,has emerged as an effective strategy to address these challenges.Fluorinated electrolytes and electrode/electrolyte interfaces have been demonstrated to significantly influence the reaction reversibility/kinetics,safety,and stability of rechargeable batteries,particularly under high voltage.This review summarizes recent advancements in fluorination treatment for high-voltage SEs,focusing on solid polymer electrolytes(SPEs),inorganic solid electrolytes(ISEs),and composite solid electrolytes(CSEs),along with the performance enhancements these strategies afford.This review aims to provide a comprehensive understanding of the structure-property relationships,the characteristics of fluorinated interfaces,and the application of fluorinated SEs in high-voltage SSLIBs.Further,the impacts of residual moisture and the challenges of fluorinated SEs are discussed.Finally,the review explores potential future directions for the development of fluorinated SSLIBs. 展开更多
关键词 Solid electrolytes high-voltage Fluorine chemistry Solid-state lithium-ion batteries Fluorinated interphase
原文传递
A high-voltage tolerance gel polymer electrolyte functioned by surface dielectric layer enabling durable supercapacitors
18
作者 Yuge Bai Yuanyuan Feng +8 位作者 Kaiming Wang Yuting Yin Nan Li Jianlin Chen Bin Zhao Fei Shen Hao Chen Fan Zhang Xiaogang Han 《Rare Metals》 2025年第9期6185-6198,共14页
Immense attention has been focused on developing supercapacitors in the field of energy storage by virtue of their exceptional power density,extended cycling stability and operational safety.However,traditional liquid... Immense attention has been focused on developing supercapacitors in the field of energy storage by virtue of their exceptional power density,extended cycling stability and operational safety.However,traditional liquid electrolytes pose severe challenges in response to leakage,high volatility and low electrochemical stability issues.To address these problems,we have developed a novel composite polymer membrane for gel polymer electrolytes(GPEs).This membrane features an internal fibrous framework composed of shape-memory polymers,while surface dielectric layers of PVDF-HFP cross-linked with modified TiO_(2)nanoparticles are constructed on both sides of the framework.This configuration modulates the Stern layer potential gradient and diffuse layer ionic distribution through dielectric polarization,thereby suppressing electrolyte decomposition at high voltages,mitigating side reactions and facilitating ionic conduction.The resultant quasi-solid-state supercapacitor demonstrates excellent electrochemical stability at a voltage of 3.5 V,achieving an energy density of 43.87 Wh kg^(-1),with a high-power density of 22.66 kW kg^(-1)along with exceptional cyclic stability and mechanical flexibility.The synergistic structural design offers a safe and efficient energy harvesting solution for wearable electronic devices and portable energy storage systems. 展开更多
关键词 SUPERCAPACITORS Gel polymer electrolyte UV cross-linking Dielectric layer high-voltage resistance
原文传递
Developing inorganic-rich interphases through single-solvent siloxane electrolytes with weak solvation characteristics for high-voltage Ni-rich batteries
19
作者 Yuanqin Li Lijiao Quan +2 位作者 Jiarong He Lidan Xing Weishan Li 《Journal of Energy Chemistry》 2025年第8期18-30,共13页
Enhancing the energy density of lithium-ion batteries through high-voltage cathodes holds great pro-mise.However,traditional carbonate-based electrolytes face significant challenges due to limited oxida-tive stability... Enhancing the energy density of lithium-ion batteries through high-voltage cathodes holds great pro-mise.However,traditional carbonate-based electrolytes face significant challenges due to limited oxida-tive stability and poor compatibility with high-nickel materials.This study introduces a novel electrolyte that combines bis(triethoxysilyl)methane(DMSP)as the sole solvent with lithium bis(fluorosulfonyl)imide(LiFSI)as the lithium salt.This formulation significantly improves the stability of LiNi_(0.8)Co_(0.1)Mn_(0.1)O_(2)(NCM811)cathodes and graphite anodes.The capacity retention of the NCM811 elec-trode increases from 5%to 95%after 1000 cycles at 1 C(3.0-4.5 V),while that of the graphite anode is improved from 22%to 92%after 400 cycles at 0.2 C(0.005-3.0 V).The NCM811//graphite pouch cell exhibits enhanced retention,rising from 12%to 66%at 25℃and from 3%to 65%at 60℃after 300 cycles at 0.2 C.Spectroscopic characterization and theoretical calculations reveal that the steric hindrance of the Si-O-CH_(3)groups in DMSP creates a weakly solvating structure,promoting the formation of Lit^(+)-FSI^(-)ion pairs and aggregation clusters,which enriches the electrode interphase with LiF,Li_(3)N,and Li_(2)SO_(3).Furthermore,DMSP with abundant Si-O effectively enhances the elasticity of the interphase layer,scav-enging harmful substances such as HF and suppressing gas evolution and transition metal dissolution.The simplicity of the DMSP-based electrolyte formulation,coupled with its superior performance,ensures scalability for large-scale manufacturing and practical application in the high-voltage battery.This work provides critical insights into improving interfacial chemistry and addressing compatibility issues in high-voltageNi-rich cathodes. 展开更多
关键词 Lithium-ion batteries high-voltage cathode Single-solvent siloxane Solvation structure Scavenging effect
在线阅读 下载PDF
High-voltage solid-sate electrolytes for advanced lithium-ion batteries
20
作者 Zhijun Wu Hao Tian +7 位作者 Dali Ji Xin Zhang Lanxun Li Zichen Lou Wenping Sun Mingxia Gao Yongfeng Liu Hongge Pan 《Journal of Energy Chemistry》 2025年第6期713-731,I0015,共20页
Solid-state batteries(SSBs) are highly attractive on account of their high energy density and good safety.In high-voltage and high-current conditions,however,the interface reactions,structural changes,and decompositio... Solid-state batteries(SSBs) are highly attractive on account of their high energy density and good safety.In high-voltage and high-current conditions,however,the interface reactions,structural changes,and decomposition of the electrolyte impede the transmission of lithium ions in all-solid-state lithium batteries(ASSLBs),significantly reducing the charging and discharging capacity and cycling stability of the battery and therefore restricting its practical applications.The main content of review is to conduct an in-depth analysis of the existing problems of solid-state batteries from the aspects of interface reactions,material failure,ion migration,and dendrite growth,and points out the main factors influencing the electrochemical performance of ASSLBs.Additionally,the compatibility and ion conduction mechanisms between polymer electrolytes,inorganic solid electrolytes,and composite electrolytes and the electrode materials are discussed.Furthermore,the perspectives of electrode materials,electrolyte properties,and interface modification are summarized and prospected,providing new optimization directions for the future commercialization of high-voltage solid-state electrolytes. 展开更多
关键词 All-solid-state batteries Solid-state electrolytes high-voltage electrolytes Interface compatibility lonic conduction
在线阅读 下载PDF
上一页 1 2 250 下一页 到第
使用帮助 返回顶部