Aqueous zinc ion battery(ZIB)with many virtues such as high safety,cost-effective,and good environmental compatibility is a large-scale energy storage technology with great application potential.Nevertheless,its appli...Aqueous zinc ion battery(ZIB)with many virtues such as high safety,cost-effective,and good environmental compatibility is a large-scale energy storage technology with great application potential.Nevertheless,its application is severely hindered by the slow diffusion of zinc ions in desirable cathode materials.Herein,a technique of water-incorporation coupled with oxygen-vacancy modulation is exploited to improve the zinc ions diffusion kinetics in vanadium pentoxide(V_(2)O_5)cathode for ZIB.The incorporated water molecules replace lattice oxygen in V_(2)O_5,and function as pillars to expand interlayer distance.So the structural stability can be enhanced,and the zinc ions diffusion kinetics might also be promoted during the repeated intercalation/deintercalation.Meanwhile,the lattice water molecules can effectively enhance conductivity due to the electronic density modulation effect.Consequently,the modulated V_(2)O_5(H-V_(2)O_5)cathode behaves with superior rate capacity and stable durability,achieving 234 mA h g^(-1)over 9000 cycles even at 20 A g^(-1).Furthermore,a flexible all-solid-state(ASS)ZIB has been constructed,exhibiting an admirable energy density of 196.6 Wh kg^(-1)and impressive power density of 20.4 kW kg^(-1)as well as excellent long-term lifespan.Importantly,the assembled flexible ASS ZIB would be able to work in a large temperature span(from-20 to 70℃).Additionally,we also uncover the energy storage mechanism of the H-V_(2)O_5 electrode,offering a novel approach for creating high-kinetics cathodes for multivalent ion storage.展开更多
The development of zinc ion batteries (ZIBs) with large capacity,high rate,and durable cathode material is a crucial and urgent task.Ni Co_(2)O_(4)(NCO) has received ever-growing interest as a potential cathode materi...The development of zinc ion batteries (ZIBs) with large capacity,high rate,and durable cathode material is a crucial and urgent task.Ni Co_(2)O_(4)(NCO) has received ever-growing interest as a potential cathode material for ZIBs,owing to the high theoretical capacity,rich source,cost-effective,and versatile redox nature.However,due to the slow dynamics of the NCO electrodes,its practical application in highperformance systems is severely limited.Herein,we report an electron density modulated NCO nanosheets (N-NCO NSs) with high-kinetics Zn^(2+)-storage capability as an additive-free cathode for flexible all-solid-state (ASS) ZIBs.By virtue of the enhanced electronic conductivity,improved reaction kinetics,and increased active sites,the optimized N-NCO NSs electrode delivers a high capacity of 357.7 m Ah g^(-1)at 1.0 A g^(-1)and a superior rate capacity of 201.4 m Ah g^(-1)at 20 A g^(-1).More importantly,a flexible ASS ZIBs device is manufactured using a solid polymer electrolyte of a poly (vinylidene fluoride hexafluoropropylene)(PVDF-HFP) film.The flexible ASS ZIBs device shows superb durability with 80.2%capacity retention after 20,000 cycles and works well in the range of-20–70℃.Furthermore,the flexible ASS ZIBs achieves an impressive energy density as high as 578.1 W h kg^(-1)with a peak power density of 33.6 k W kg^(-1),substantially outperforming those latest ZIBs.This work could provide valuable insights for constructing high-kinetics and high-capability cathodes with long-term stability for flexible ASS ZIBs.展开更多
Dual-ion batteries(DIBs)have gained widespread attention thanks to their high operating voltage,low cost,and environmental friendliness.However,the development of DIBs is dramatically limited by the unsatisfactory rat...Dual-ion batteries(DIBs)have gained widespread attention thanks to their high operating voltage,low cost,and environmental friendliness.However,the development of DIBs is dramatically limited by the unsatisfactory rate capacity and cycling performance of anode materials.Herein,we adopted a waterincorporation approach to design a V_(2)O_(5) anode with an extended interlayer gap(W-V_(2)O_(5)).The incorporated H_(2)O not only offered ample space and abundant channels for efficient ion/electron intercalation/diffusion,but also improved structural stability during the repeated charge and discharge processes.Consequently,the W-V_(2)O_(5) electrode delivered an enhanced specific capacity(293.2 vs.264.4 mA h g^(-1) at 1C),rate property(48.2%vs.24.6% from 1C to 70C),and cycling stability(96.8%vs.74.6% over 1000 cycles).Furthermore,a DIBs device with fast kinetics was assembled with a graphite cathode and W-V_(2)O_(5) NS anode,which could work normally in a wide range of current densities.This work opens a new avenue for designing layered materials for energy-storage devices with high rate and good durability.展开更多
This study explored the effects of Maillard reaction on the structural alterations and antioxidant potential of abalone myofibrillar protein conjugates with glucose(GMPs)produced at varying temperatures(50℃-90℃).Our...This study explored the effects of Maillard reaction on the structural alterations and antioxidant potential of abalone myofibrillar protein conjugates with glucose(GMPs)produced at varying temperatures(50℃-90℃).Our findings revealed that GMPs with varying degrees of grafting were prepared,displaying structural transformations such as increasedα-helix andβ-sheet contents,particularly at 80℃(GMP-80),achieving an optimal grafting degree(30.67%±1.55%).Subsequent in vitro gastrointestinal digestion of GMP-80 yielded digestion products with remarkable antioxidant activities,including 2,2-diphenyl-1-picrylhydrazyl(DPPH),2,2′-azinobis(3-ethylbenzothiazoline)-6-sulfonic acid(ABTS),and ferric reducing antioxidant power(FRAP)scavenging with IC_(50) values of 2.77±0.37,0.52±0.07,and 25.67±0.61 mg/mL,respectively.Compared with control,GMP-80 digests significantly prolonged lifespan,improved locomotor activity,efficiently scavenged ROS,and boosted antioxidant enzyme activity(P<0.05)in Caenorhabditis elegans.These findings provided insights into the structure-bioactivity relationship of GMPs and offered theoretical guidance for optimizing Maillard reaction conditions to elevate the processing quality and nutritional value of abalone protein.展开更多
Wind power technology has been widely used due to its characteristics of environmental protection,sustainability and low cost.The yaw system plays a vital role in improving the energy capture efficiency of a wind turb...Wind power technology has been widely used due to its characteristics of environmental protection,sustainability and low cost.The yaw system plays a vital role in improving the energy capture efficiency of a wind turbine.However,the method of layout determination is lacking in the yaw system.To solve this problem,a method that combines the Delphi method and the analytic hierarchy process was proposed in this study.Twelve evaluation indexes,including transmission efficiency,ratio range,operating temperature range and others,were identified by screening 18 technical indicators using the Delphi method.Subsequently,the evaluation system of the yaw system was established.Then,six configuration schemes were selected.Experts’scores of schemes were collected according to the evaluation system and the score matrix of evaluation indexes was obtained.The hierarchical model of the evaluation indexes of the yaw system was established and the comprehensive weight was obtained by using the analytic hierarchy process.After calculating the comprehensive evaluation score,the comprehensive evaluation result was obtained.The 2Z-X(A)negative mechanism,which achieved the highest score of 0.9227,is the optimal scheme.A new method and specific process are provided for designers.The research gap in the scheme selection method for yaw systems is filled.展开更多
基金the Natural Science Foundation of Guangdong Province of China(2023A1515011672)the Educational Commission of Guangdong Province of China(2022ZDZX3048)+1 种基金the Research projects for college students of Guangdong Industry Polytechnic College(XSKYL202208)the Key Laboratory of Electrochemical Energy Storage and Energy Conversion of Hainan Province,School of Chemistry and Chemical Engineering,Hainan Normal University,Haikou,South Longkun Rd.571158,P.R.China(KFKT2023003)。
文摘Aqueous zinc ion battery(ZIB)with many virtues such as high safety,cost-effective,and good environmental compatibility is a large-scale energy storage technology with great application potential.Nevertheless,its application is severely hindered by the slow diffusion of zinc ions in desirable cathode materials.Herein,a technique of water-incorporation coupled with oxygen-vacancy modulation is exploited to improve the zinc ions diffusion kinetics in vanadium pentoxide(V_(2)O_5)cathode for ZIB.The incorporated water molecules replace lattice oxygen in V_(2)O_5,and function as pillars to expand interlayer distance.So the structural stability can be enhanced,and the zinc ions diffusion kinetics might also be promoted during the repeated intercalation/deintercalation.Meanwhile,the lattice water molecules can effectively enhance conductivity due to the electronic density modulation effect.Consequently,the modulated V_(2)O_5(H-V_(2)O_5)cathode behaves with superior rate capacity and stable durability,achieving 234 mA h g^(-1)over 9000 cycles even at 20 A g^(-1).Furthermore,a flexible all-solid-state(ASS)ZIB has been constructed,exhibiting an admirable energy density of 196.6 Wh kg^(-1)and impressive power density of 20.4 kW kg^(-1)as well as excellent long-term lifespan.Importantly,the assembled flexible ASS ZIB would be able to work in a large temperature span(from-20 to 70℃).Additionally,we also uncover the energy storage mechanism of the H-V_(2)O_5 electrode,offering a novel approach for creating high-kinetics cathodes for multivalent ion storage.
基金the Basic and Applied Basic Research Project of Guangdong Province(2019A1515110827)the Science and Technology Planning Project of Guangzhou(202102080169)+3 种基金the Education Commission of Guangdong Province(2019GKTSCX015)the Advanced Functional Materials Scientific Research and Technical Service Team(X20190197)Guangdong Training Programs of Scientific and Technological Innovation for Undergraduates(pdjh2021a0715)the Innovation Training Program for Undergraduate of Hainan Normal University(2021024)。
文摘The development of zinc ion batteries (ZIBs) with large capacity,high rate,and durable cathode material is a crucial and urgent task.Ni Co_(2)O_(4)(NCO) has received ever-growing interest as a potential cathode material for ZIBs,owing to the high theoretical capacity,rich source,cost-effective,and versatile redox nature.However,due to the slow dynamics of the NCO electrodes,its practical application in highperformance systems is severely limited.Herein,we report an electron density modulated NCO nanosheets (N-NCO NSs) with high-kinetics Zn^(2+)-storage capability as an additive-free cathode for flexible all-solid-state (ASS) ZIBs.By virtue of the enhanced electronic conductivity,improved reaction kinetics,and increased active sites,the optimized N-NCO NSs electrode delivers a high capacity of 357.7 m Ah g^(-1)at 1.0 A g^(-1)and a superior rate capacity of 201.4 m Ah g^(-1)at 20 A g^(-1).More importantly,a flexible ASS ZIBs device is manufactured using a solid polymer electrolyte of a poly (vinylidene fluoride hexafluoropropylene)(PVDF-HFP) film.The flexible ASS ZIBs device shows superb durability with 80.2%capacity retention after 20,000 cycles and works well in the range of-20–70℃.Furthermore,the flexible ASS ZIBs achieves an impressive energy density as high as 578.1 W h kg^(-1)with a peak power density of 33.6 k W kg^(-1),substantially outperforming those latest ZIBs.This work could provide valuable insights for constructing high-kinetics and high-capability cathodes with long-term stability for flexible ASS ZIBs.
基金the Basic and Applied Basic Research Project of Guangdong Province(2019A1515110827)Science and Technology Planning Project of Guangzhou(202102080169)+3 种基金Education Commission of Guangdong Province(2022ZDZX3048)Advanced Functional Materials Scientific Research and Technical Service Team(X20190197)Undergraduate research projects of Guangdong Industry Polytechnic College(XSKYL202208)Exquisite Education Project of Guangdong Industry Polytechnic College(JZYR202120).
文摘Dual-ion batteries(DIBs)have gained widespread attention thanks to their high operating voltage,low cost,and environmental friendliness.However,the development of DIBs is dramatically limited by the unsatisfactory rate capacity and cycling performance of anode materials.Herein,we adopted a waterincorporation approach to design a V_(2)O_(5) anode with an extended interlayer gap(W-V_(2)O_(5)).The incorporated H_(2)O not only offered ample space and abundant channels for efficient ion/electron intercalation/diffusion,but also improved structural stability during the repeated charge and discharge processes.Consequently,the W-V_(2)O_(5) electrode delivered an enhanced specific capacity(293.2 vs.264.4 mA h g^(-1) at 1C),rate property(48.2%vs.24.6% from 1C to 70C),and cycling stability(96.8%vs.74.6% over 1000 cycles).Furthermore,a DIBs device with fast kinetics was assembled with a graphite cathode and W-V_(2)O_(5) NS anode,which could work normally in a wide range of current densities.This work opens a new avenue for designing layered materials for energy-storage devices with high rate and good durability.
基金supported by[Joint Fund Project of Fujian Natural Science Foundation]under Grant[2022J01804][Joint Fund Project of Xiamen Natural Science Foundation]under Grant[3502Z20227203][National Fund Cultivation Program Project of Jimei University]under Grant[ZP2023011].
文摘This study explored the effects of Maillard reaction on the structural alterations and antioxidant potential of abalone myofibrillar protein conjugates with glucose(GMPs)produced at varying temperatures(50℃-90℃).Our findings revealed that GMPs with varying degrees of grafting were prepared,displaying structural transformations such as increasedα-helix andβ-sheet contents,particularly at 80℃(GMP-80),achieving an optimal grafting degree(30.67%±1.55%).Subsequent in vitro gastrointestinal digestion of GMP-80 yielded digestion products with remarkable antioxidant activities,including 2,2-diphenyl-1-picrylhydrazyl(DPPH),2,2′-azinobis(3-ethylbenzothiazoline)-6-sulfonic acid(ABTS),and ferric reducing antioxidant power(FRAP)scavenging with IC_(50) values of 2.77±0.37,0.52±0.07,and 25.67±0.61 mg/mL,respectively.Compared with control,GMP-80 digests significantly prolonged lifespan,improved locomotor activity,efficiently scavenged ROS,and boosted antioxidant enzyme activity(P<0.05)in Caenorhabditis elegans.These findings provided insights into the structure-bioactivity relationship of GMPs and offered theoretical guidance for optimizing Maillard reaction conditions to elevate the processing quality and nutritional value of abalone protein.
基金supported by the Sichuan University-Dazhou Municipal People’s Government Strategic Cooperation Special Funds Project of China(2022CDDZ-08).
文摘Wind power technology has been widely used due to its characteristics of environmental protection,sustainability and low cost.The yaw system plays a vital role in improving the energy capture efficiency of a wind turbine.However,the method of layout determination is lacking in the yaw system.To solve this problem,a method that combines the Delphi method and the analytic hierarchy process was proposed in this study.Twelve evaluation indexes,including transmission efficiency,ratio range,operating temperature range and others,were identified by screening 18 technical indicators using the Delphi method.Subsequently,the evaluation system of the yaw system was established.Then,six configuration schemes were selected.Experts’scores of schemes were collected according to the evaluation system and the score matrix of evaluation indexes was obtained.The hierarchical model of the evaluation indexes of the yaw system was established and the comprehensive weight was obtained by using the analytic hierarchy process.After calculating the comprehensive evaluation score,the comprehensive evaluation result was obtained.The 2Z-X(A)negative mechanism,which achieved the highest score of 0.9227,is the optimal scheme.A new method and specific process are provided for designers.The research gap in the scheme selection method for yaw systems is filled.
