In recent years,sodium-ion batteries(SIBs)have become one of the hot discussions and have gradually moved toward industrialization.However,there are still some shortcomings in their performance that have not been well...In recent years,sodium-ion batteries(SIBs)have become one of the hot discussions and have gradually moved toward industrialization.However,there are still some shortcomings in their performance that have not been well addressed,including phase transition,structural degradation,and voltage platform.High entropy materials have recently gained significant attention from researchers due to their effects on thermodynamics,dynamics,structure,and performance.Researchers have attempted to use these materials in sodium-ion batteries to overcome their problems,making it a modification method.This paper aims to discuss the research status of high-entropy cathode materials for sodium-ion batteries and summarize their effects on sodium-ion batteries from three perspectives:Layered oxide,polyanion,and Prussian blue.The infiuence on material structure,the inhibition of phase transition,and the improvement of ion diffusivity are described.Finally,the advantages and disadvantages of high-entropy cathode materials for sodium-ion batteries are summarized,and their future development has prospected.展开更多
1概述肺癌是最常见的恶性肿瘤之一,在世界各地,肺癌均居恶性肿瘤死亡构成比的第一位,其发病率和死亡率仍在不断升高。据世界卫生组织（World Health Organization,WHO）下属的国际癌症研究机构（International Agency for Research on C...1概述肺癌是最常见的恶性肿瘤之一,在世界各地,肺癌均居恶性肿瘤死亡构成比的第一位,其发病率和死亡率仍在不断升高。据世界卫生组织（World Health Organization,WHO）下属的国际癌症研究机构（International Agency for Research on Cancer,IARC）出版的GLOBOCAN 2012估计：全世界肺癌新发病例1 8 2.5万（男性124.2万,女性58.3万）.展开更多
To overcome reliance on molds and the difficulty of fabricating complex geometries with traditional C/C composites,direct ink writing(DIW)with UV/heat dual curing was employed to produce high-performance C/C composite...To overcome reliance on molds and the difficulty of fabricating complex geometries with traditional C/C composites,direct ink writing(DIW)with UV/heat dual curing was employed to produce high-performance C/C composites.The rheological properties of the composite inks were systematically analyzed to assess the effects of phenolic resin(PR)and carbon fiber(CF)content.Results show pronounced shear-thinning behavior and strong thixotropy-both essential for stable DIW.Additionally,UV/heat curing behavior was characterized to provide theoretical insights for optimizing curing parameters.Notably,CF addition is found to significantly attenuate UV light penetration compared to pure PR.As CF content increases,the critical UV irradiation energy rises sharply from 68.47 to 911.19 mJ/cm^(2),necessitating precise adjustments to curing parameters.Preforms were pyrolyzed in a carbon tube furnace to examine pore-formation characteristics,and chemical vapor infiltration(CVI)was applied to filling the resulting pores,yielding C/C composites with a flexural strength of 115.19 MPa.展开更多
Due to its high electrical conductivity and platinum-like electronic structure,molybdenum phosphide(MoP)has attracted extensive attention as a potential catalyst for the hydrogen evolution reaction(HER)by water splitt...Due to its high electrical conductivity and platinum-like electronic structure,molybdenum phosphide(MoP)has attracted extensive attention as a potential catalyst for the hydrogen evolution reaction(HER)by water splitting.Nevertheless,in the oxygen evolution reaction(OER),the electrocatalytic performance of MoP did not achieve satisfactory results.Therefore,novel nitrogen-doped carbon-encapsulated Ladoped MoP nanoparticles(La-MoP@N/C)are synthesized,which show outstanding durability and electrocatalytic activity in both HER and OER.Detailed structural characterization and calculations confirm that La doping not only effectively adjusts the electron density around Mo and P atoms,accelerates the adsorption and desorption processes,but also increases the number of active sites.Low overpotentials of 113 and 388 mV for HER and OER at 10 mA cm−2 are achieved with the optimized La0.025-Mo0.975P@N/C.Furthermore,the two-electrode electrolyzer assembled with La0.025-Mo0.975P@N/C also presents impressive water splitting performance.This study indicates that rare earth doping can be used as an efficient strategy to control the local electronic structure of phosphides precisely,which can also be extended to other electrocatalysts.展开更多
P2-type layered oxide cathode materials have attracted extensive attention due to their simple preparation,high specific capacity,adjustable voltage range,and high packing density.However,the harmful phase transitions...P2-type layered oxide cathode materials have attracted extensive attention due to their simple preparation,high specific capacity,adjustable voltage range,and high packing density.However,the harmful phase transitions that occur at high voltage severely limit their practical application.Herein,a novel high-valence tungsten doped P2-Na_(0.67)Ni_(0.33)Mn_(0.67)O_(2)cathode material was prepared using the sol–gel method.Through diffusion kinetics analysis and in situ X-ray diffraction(in situ XRD),it has been proven that W^(6+)not only enhances the Na^(+)diffusion coefficient but also reduces the P2–O2 phase transition.The optimized NNMO-W1%delivers a high discharge specific capacity of 163 mAh·g^(-1)at 0.1C,and the capacity retention rate is as high as 77.6%after 1000 cycles at 10C.This is mainly due to that W^(6+)enters the lattice,optimizing the arrangement of primary particles.This work sheds light on the design and construction of high-performance layered oxides cathode materials.展开更多
文摘目的 探讨血栓弹力图联合血小板抗体在肝癌患者输血中的指导作用。方法 选取肝癌患者100例,按输血指导方法的不同分组,按常规凝血功能指标指导输血的患者作为A组(n=35),按常规凝血功能指标+血小板抗体指导输血的患者作为B组(n=30),采用血栓弹力图+血小板抗体+常规凝血功能指标指导输血的患者作为C组(n=35)。比较C组输血前后R、K、α角、MA、CI值,记录并比较输血前后3组PT、APPT、TT、FIB,统计分析输血前后3组血液成分(红细胞、新鲜冷冻血浆、冷沉淀、血小板)、输注量及输注后1、24 h校正指数(CCI)值。结果 C组输血后R、K低于输血前(P<0.05),α角、MA、CI高于输血前(P<0.05)。输血前3组凝血功能指标比较,P>0.05;输血后C组PT、APPT、TT低于A组和B组(P<0.05),FIB高于A组和B组(P<0.05)。C组血液成分输注量低于A组和B组(P<0.05),B组血液成分输注量低于A组(P<0.05)。输注后1、24 h C组CCI值均高于A组和B组(P<0.05),输注后1、24 h B组CCI值高于A组(P<0.05)。结论 血栓弹力图联合血小板抗体检测在肝癌患者输血指导中具有重要作用,能够有效优化输血方案并提高输血效果。
基金the National Natural Science Foundation of China Key Program(No.U22A20420)Changzhou Leading Innovative Talents Introduction and Cultivation Project(No.CQ20230109)for supporting our work。
文摘In recent years,sodium-ion batteries(SIBs)have become one of the hot discussions and have gradually moved toward industrialization.However,there are still some shortcomings in their performance that have not been well addressed,including phase transition,structural degradation,and voltage platform.High entropy materials have recently gained significant attention from researchers due to their effects on thermodynamics,dynamics,structure,and performance.Researchers have attempted to use these materials in sodium-ion batteries to overcome their problems,making it a modification method.This paper aims to discuss the research status of high-entropy cathode materials for sodium-ion batteries and summarize their effects on sodium-ion batteries from three perspectives:Layered oxide,polyanion,and Prussian blue.The infiuence on material structure,the inhibition of phase transition,and the improvement of ion diffusivity are described.Finally,the advantages and disadvantages of high-entropy cathode materials for sodium-ion batteries are summarized,and their future development has prospected.
文摘1概述肺癌是最常见的恶性肿瘤之一,在世界各地,肺癌均居恶性肿瘤死亡构成比的第一位,其发病率和死亡率仍在不断升高。据世界卫生组织（World Health Organization,WHO）下属的国际癌症研究机构（International Agency for Research on Cancer,IARC）出版的GLOBOCAN 2012估计：全世界肺癌新发病例1 8 2.5万（男性124.2万,女性58.3万）.
基金supported by State Key Laboratory of Powder Metallurgy,Central South University,Changsha,China.
文摘To overcome reliance on molds and the difficulty of fabricating complex geometries with traditional C/C composites,direct ink writing(DIW)with UV/heat dual curing was employed to produce high-performance C/C composites.The rheological properties of the composite inks were systematically analyzed to assess the effects of phenolic resin(PR)and carbon fiber(CF)content.Results show pronounced shear-thinning behavior and strong thixotropy-both essential for stable DIW.Additionally,UV/heat curing behavior was characterized to provide theoretical insights for optimizing curing parameters.Notably,CF addition is found to significantly attenuate UV light penetration compared to pure PR.As CF content increases,the critical UV irradiation energy rises sharply from 68.47 to 911.19 mJ/cm^(2),necessitating precise adjustments to curing parameters.Preforms were pyrolyzed in a carbon tube furnace to examine pore-formation characteristics,and chemical vapor infiltration(CVI)was applied to filling the resulting pores,yielding C/C composites with a flexural strength of 115.19 MPa.
基金financially supported by the Natural Science Foundation of Jiangsu Province(BK20240972)the Changzhou Leading Innovative Talents Introduction and Cultivation Project(Nos.CQ20230109 and CQ20230108)+1 种基金the Jiangsu Provincial Double-Innovation Doctor(No.JSSCBS20230439)the National Natural Science Foundation of China Key Program(No.U22A20420).
文摘Due to its high electrical conductivity and platinum-like electronic structure,molybdenum phosphide(MoP)has attracted extensive attention as a potential catalyst for the hydrogen evolution reaction(HER)by water splitting.Nevertheless,in the oxygen evolution reaction(OER),the electrocatalytic performance of MoP did not achieve satisfactory results.Therefore,novel nitrogen-doped carbon-encapsulated Ladoped MoP nanoparticles(La-MoP@N/C)are synthesized,which show outstanding durability and electrocatalytic activity in both HER and OER.Detailed structural characterization and calculations confirm that La doping not only effectively adjusts the electron density around Mo and P atoms,accelerates the adsorption and desorption processes,but also increases the number of active sites.Low overpotentials of 113 and 388 mV for HER and OER at 10 mA cm−2 are achieved with the optimized La0.025-Mo0.975P@N/C.Furthermore,the two-electrode electrolyzer assembled with La0.025-Mo0.975P@N/C also presents impressive water splitting performance.This study indicates that rare earth doping can be used as an efficient strategy to control the local electronic structure of phosphides precisely,which can also be extended to other electrocatalysts.
基金supported by the National Natural Science Foundation of China Key Program(No.U22A20420)Changzhou Leading Innovative Talents Introduction and Cultivation Project(No.CQ20230109)the Key Project of Jiangsu Provincial Basic Research Program(No.BK20243032)。
文摘P2-type layered oxide cathode materials have attracted extensive attention due to their simple preparation,high specific capacity,adjustable voltage range,and high packing density.However,the harmful phase transitions that occur at high voltage severely limit their practical application.Herein,a novel high-valence tungsten doped P2-Na_(0.67)Ni_(0.33)Mn_(0.67)O_(2)cathode material was prepared using the sol–gel method.Through diffusion kinetics analysis and in situ X-ray diffraction(in situ XRD),it has been proven that W^(6+)not only enhances the Na^(+)diffusion coefficient but also reduces the P2–O2 phase transition.The optimized NNMO-W1%delivers a high discharge specific capacity of 163 mAh·g^(-1)at 0.1C,and the capacity retention rate is as high as 77.6%after 1000 cycles at 10C.This is mainly due to that W^(6+)enters the lattice,optimizing the arrangement of primary particles.This work sheds light on the design and construction of high-performance layered oxides cathode materials.
