Aqueous sodium-ion batteries(ASIBs)have attracted great attention in aqueous batteries due to their merit of high safety.However,the constrained work potential and insufficient chemical stability of anode materials in...Aqueous sodium-ion batteries(ASIBs)have attracted great attention in aqueous batteries due to their merit of high safety.However,the constrained work potential and insufficient chemical stability of anode materials in aqueous electro-lytes hinder the large-scale application of ASIBs.Sodium titanium phosphate,NaTi_(2)(PO_(4))_(3)(NTP),is considered one of the most promising anode materials for ASIBs due to its excellent electrochemical performance and tunable structure.Recently,great achievements have been made in the development of NTP,however,a comprehensive review of existing studies is still lacking.This article firstly introduces the basic properties of NTP and analyzes the existing challenges.Subsequently,it will provide a comprehensive overview of the key strategies related to the design and modification of NTP materials with optimized electrochemical performance.Finally,based on the current research status and practical needs,suggestions,and future perspectives for advancing NTP in practical applications of ASIBs are presented.This review aims to guide the future research trajectory from basic material innovation to industrial applications,thus promoting the large-scale commercializa-tion of ASIBs.展开更多
Li_(3)V_(2)(PO_(4))_(3) is a promising high-voltage cathode for zincion batteries,but it suffers from a poor electronic conductivity and vanadium dissolution in aqueous electrolytes.The growth of carboncoated Li_(3)V_...Li_(3)V_(2)(PO_(4))_(3) is a promising high-voltage cathode for zincion batteries,but it suffers from a poor electronic conductivity and vanadium dissolution in aqueous electrolytes.The growth of carboncoated Li_(3)V_(2)(PO_(4))_(3)(LVP@C)nanoparticles on carbon nanofibers(CNFs)has been achieved by an electrospinning technique followed by calcination.The protective carbon coating prevents the aggregation of the LVP nanoparticles and suppresses V dissolution by preventing direct contact with aqueous electrolytes.The CNFs derived from the electrospun nanofibers provide a 3D network to increase the electronic conductivity of the LVP electrode,and the LVP@C-CNF hybrid film can be directly used as a freestanding cathode for zinc-ion batteries without adding conductive additives and binders.A mechanism for the formation of a uniform and continuous carbon coating has been proposed.This nanostructure,combined with the uniform and intact carbon coverage,significantly increases the electronic conductivity.This LVP@C-CNF freestanding electrode has an excellent rate capability(47.3%retention at 2 C)and cycling stability(61.2%retention after 100 cycles)within the voltage range 0.6 V to 1.95 V and is highly suitable for zinc-ion battery applications.展开更多
NASICON-type Na_(3)V_(2)(PO_(4))_(3)(NVP)materials are seen as highly promising cathode materials in the field of sodium-ion batteries due to their low cost,a solid three-dimensional skeleton and good theoretical capa...NASICON-type Na_(3)V_(2)(PO_(4))_(3)(NVP)materials are seen as highly promising cathode materials in the field of sodium-ion batteries due to their low cost,a solid three-dimensional skeleton and good theoretical capacity,as well as high ionic conductivity.Nevertheless,the problem of low intrinsic electronic conductivity and energy density has limited the practical application of the materials.To address this issue,the relevant research team has successfully achieved remarkable research results through unremitting exploration and practical innovation.In this work,the crystal structure,ion migration mechanism and sodium storage mechanism of NVP cathode materials are systematically reviewed,with a focus on summarizing the latest progress of V-site doping modification research,classifying and exploring V-site doping from the perspectives of electronic structure,lattice strain and entropy,and briefly describing the optimization mechanism of V-site doping on electrochemical performance.In addition,the challenges and prospects for the future development of NVP cathode materials are presented,which are believed to provide new thinking for the design and development of high-performance NVP cathode materials and contribute to the large-scale application of sodium-ion batteries.展开更多
Na_(3)V_(2)(PO_(4))_(3)(NVP)has garnered great attentions as a prospective cathode material for sodium-ion batteries(SIBs)by virtue of its decent theoretical capacity,superior ion conductivity and high structural stab...Na_(3)V_(2)(PO_(4))_(3)(NVP)has garnered great attentions as a prospective cathode material for sodium-ion batteries(SIBs)by virtue of its decent theoretical capacity,superior ion conductivity and high structural stability.However,the inherently poor electronic conductivity and sluggish sodium-ion diffusion kinetics of NVP material give rise to inferior rate performance and unsatisfactory energy density,which strictly confine its further application in SIBs.Thus,it is of significance to boost the sodium storage performance of NVP cathode material.Up to now,many methods have been developed to optimize the electrochemical performance of NVP cathode material.In this review,the latest advances in optimization strategies for improving the electrochemical performance of NVP cathode material are well summarized and discussed,including carbon coating or modification,foreign-ion doping or substitution and nanostructure and morphology design.The foreign-ion doping or substitution is highlighted,involving Na,V,and PO_(4)^(3−)sites,which include single-site doping,multiple-site doping,single-ion doping,multiple-ion doping and so on.Furthermore,the challenges and prospects of high-performance NVP cathode material are also put forward.It is believed that this review can provide a useful reference for designing and developing high-performance NVP cathode material toward the large-scale application in SIBs.展开更多
为降低Li_(1+x)Al_(x)Ti_(2-x)(PO_(4))_(3)(LATP)电解质膜与锂金属负极之间的界面阻抗,抑制LATP与锂金属之间的副反应以及锂枝晶的生长,提高LATP电解质膜的性能,使用PVDF对LATP基电解质膜界面进行修饰,并研究其电化学性能。将LATP陶瓷...为降低Li_(1+x)Al_(x)Ti_(2-x)(PO_(4))_(3)(LATP)电解质膜与锂金属负极之间的界面阻抗,抑制LATP与锂金属之间的副反应以及锂枝晶的生长,提高LATP电解质膜的性能,使用PVDF对LATP基电解质膜界面进行修饰,并研究其电化学性能。将LATP陶瓷粉末与聚氧化乙烯、LIFSI混合均匀后浇筑成膜,将PVDF溶液均匀涂覆在电解质膜表面,干燥得到修饰后的电解质膜。通过电化学实验、充放电实验、表面表征等方法,研究PVDF修饰后电解质膜的性能。结果显示,PVDF影响了LATP的晶体结构,优化了锂离子迁移通道。修饰后电解质膜的室温离子电导率提升,室温下电化学窗口由3.74 V增加到4.10 V,锂离子迁移数由0.915提升到0.978,组装锂金属对称电池在0.05 m A/cm^(2)电流密度下的循环时间从45 h提升到280 h以上,有效抑制了锂枝晶的生长,提升了电解质膜与锂金属界面稳定性。在电流密度0.025、0.050、0.100、0.200 m A/cm^(2)下的极化电压分别为27、60、110、220 m V。在LFP|SSCEs-1|Li全电池中循环超过25圈后形成了良好的SEI界面。从第25圈到第100圈容量保持率为87%,库仑效率始终保持在95%以上。PVDF修饰层提升了LATP电解质膜的电化学性能以及和锂金属界面的稳定性,对全固态锂电池的应用具有积极意义。展开更多
基金supported by the Natural Sci-ence Foundation of Fujian Province (No.2024J011210)the High-Level Talent Start-Up Foundation of Xiamen Institute of Technology (No.YKJ23017R)。
文摘Aqueous sodium-ion batteries(ASIBs)have attracted great attention in aqueous batteries due to their merit of high safety.However,the constrained work potential and insufficient chemical stability of anode materials in aqueous electro-lytes hinder the large-scale application of ASIBs.Sodium titanium phosphate,NaTi_(2)(PO_(4))_(3)(NTP),is considered one of the most promising anode materials for ASIBs due to its excellent electrochemical performance and tunable structure.Recently,great achievements have been made in the development of NTP,however,a comprehensive review of existing studies is still lacking.This article firstly introduces the basic properties of NTP and analyzes the existing challenges.Subsequently,it will provide a comprehensive overview of the key strategies related to the design and modification of NTP materials with optimized electrochemical performance.Finally,based on the current research status and practical needs,suggestions,and future perspectives for advancing NTP in practical applications of ASIBs are presented.This review aims to guide the future research trajectory from basic material innovation to industrial applications,thus promoting the large-scale commercializa-tion of ASIBs.
文摘Li_(3)V_(2)(PO_(4))_(3) is a promising high-voltage cathode for zincion batteries,but it suffers from a poor electronic conductivity and vanadium dissolution in aqueous electrolytes.The growth of carboncoated Li_(3)V_(2)(PO_(4))_(3)(LVP@C)nanoparticles on carbon nanofibers(CNFs)has been achieved by an electrospinning technique followed by calcination.The protective carbon coating prevents the aggregation of the LVP nanoparticles and suppresses V dissolution by preventing direct contact with aqueous electrolytes.The CNFs derived from the electrospun nanofibers provide a 3D network to increase the electronic conductivity of the LVP electrode,and the LVP@C-CNF hybrid film can be directly used as a freestanding cathode for zinc-ion batteries without adding conductive additives and binders.A mechanism for the formation of a uniform and continuous carbon coating has been proposed.This nanostructure,combined with the uniform and intact carbon coverage,significantly increases the electronic conductivity.This LVP@C-CNF freestanding electrode has an excellent rate capability(47.3%retention at 2 C)and cycling stability(61.2%retention after 100 cycles)within the voltage range 0.6 V to 1.95 V and is highly suitable for zinc-ion battery applications.
基金supported by the National Natural Science Foundation of China(no.52574348)the Natural Science Foundation of Hebei Province(no.B2024501004)+2 种基金the Fundamental Research Funds for the Central Universities(no.N2423013)the Shijiazhuang Basic Research Project(no.241790667A)the Performance Subsidy Fund for Key Laboratory of Dielectric and Electrolyte Functional Material Hebei Province(no.22567627H).
文摘NASICON-type Na_(3)V_(2)(PO_(4))_(3)(NVP)materials are seen as highly promising cathode materials in the field of sodium-ion batteries due to their low cost,a solid three-dimensional skeleton and good theoretical capacity,as well as high ionic conductivity.Nevertheless,the problem of low intrinsic electronic conductivity and energy density has limited the practical application of the materials.To address this issue,the relevant research team has successfully achieved remarkable research results through unremitting exploration and practical innovation.In this work,the crystal structure,ion migration mechanism and sodium storage mechanism of NVP cathode materials are systematically reviewed,with a focus on summarizing the latest progress of V-site doping modification research,classifying and exploring V-site doping from the perspectives of electronic structure,lattice strain and entropy,and briefly describing the optimization mechanism of V-site doping on electrochemical performance.In addition,the challenges and prospects for the future development of NVP cathode materials are presented,which are believed to provide new thinking for the design and development of high-performance NVP cathode materials and contribute to the large-scale application of sodium-ion batteries.
基金partly supported by the National Natural Science Foundation of China(Grant No.52272225).
文摘Na_(3)V_(2)(PO_(4))_(3)(NVP)has garnered great attentions as a prospective cathode material for sodium-ion batteries(SIBs)by virtue of its decent theoretical capacity,superior ion conductivity and high structural stability.However,the inherently poor electronic conductivity and sluggish sodium-ion diffusion kinetics of NVP material give rise to inferior rate performance and unsatisfactory energy density,which strictly confine its further application in SIBs.Thus,it is of significance to boost the sodium storage performance of NVP cathode material.Up to now,many methods have been developed to optimize the electrochemical performance of NVP cathode material.In this review,the latest advances in optimization strategies for improving the electrochemical performance of NVP cathode material are well summarized and discussed,including carbon coating or modification,foreign-ion doping or substitution and nanostructure and morphology design.The foreign-ion doping or substitution is highlighted,involving Na,V,and PO_(4)^(3−)sites,which include single-site doping,multiple-site doping,single-ion doping,multiple-ion doping and so on.Furthermore,the challenges and prospects of high-performance NVP cathode material are also put forward.It is believed that this review can provide a useful reference for designing and developing high-performance NVP cathode material toward the large-scale application in SIBs.
文摘为降低Li_(1+x)Al_(x)Ti_(2-x)(PO_(4))_(3)(LATP)电解质膜与锂金属负极之间的界面阻抗,抑制LATP与锂金属之间的副反应以及锂枝晶的生长,提高LATP电解质膜的性能,使用PVDF对LATP基电解质膜界面进行修饰,并研究其电化学性能。将LATP陶瓷粉末与聚氧化乙烯、LIFSI混合均匀后浇筑成膜,将PVDF溶液均匀涂覆在电解质膜表面,干燥得到修饰后的电解质膜。通过电化学实验、充放电实验、表面表征等方法,研究PVDF修饰后电解质膜的性能。结果显示,PVDF影响了LATP的晶体结构,优化了锂离子迁移通道。修饰后电解质膜的室温离子电导率提升,室温下电化学窗口由3.74 V增加到4.10 V,锂离子迁移数由0.915提升到0.978,组装锂金属对称电池在0.05 m A/cm^(2)电流密度下的循环时间从45 h提升到280 h以上,有效抑制了锂枝晶的生长,提升了电解质膜与锂金属界面稳定性。在电流密度0.025、0.050、0.100、0.200 m A/cm^(2)下的极化电压分别为27、60、110、220 m V。在LFP|SSCEs-1|Li全电池中循环超过25圈后形成了良好的SEI界面。从第25圈到第100圈容量保持率为87%,库仑效率始终保持在95%以上。PVDF修饰层提升了LATP电解质膜的电化学性能以及和锂金属界面的稳定性,对全固态锂电池的应用具有积极意义。
