Some facets of the Mg/Na_(3)VCr_(0.5)Fe_(0.5)(PO_(4))_(3) battery  

作　　者：Gregorio F.Ortiz 

机构地区：[1]Xiamen Key Laboratory of Optoelectronic Materials and Advanced Manufacturing,Institute of Luminescent Materials and Information Displays,College of Materials Science and Engineering,Huaqiao University,Xiamen 361021,China

出　　处：《Chinese Chemical Letters》2024年第10期469-473,共5页中国化学快报（英文版）

基　　金：supported by the Scientific Research Funds of Huaqiao University and Xiamen University Foreign Young Talents Program(No.G2022149004L)。

摘　　要：Magnesium rechargeable batteries(MRBs)present opportunities for grid-scale energy storage applications as a complement to Li-ion batteries(LIBS).The major challenges are the low reversible capacity,inferior cycling stability and unsatisfactory energy densities.Na_(3)VCr_(0.5)Fe_(0.5)(PO_(4))_(3) with a well-defined NASIONtype structure is used as cathode in Mg cell.Two-electrons reaction(~116 m Ah/g),1.5 V average voltage and 65%of capacity retention over 100 cycles are accomplished.Mg is inserted by a biphasic reaction with the participation of V3+/V4+/V5+redox couples in the electrochemical reaction while the non-active redox couples such as Cr^(3+)/Cr^(4+)and Fe^(2+)/Fe^(3+)served as stabilizer to buffer the volume variation.A thermal stability up to~412℃ is also exhibited.Therefore,incorporating a mixture of three transition metal(V/Cr/Fe)in this type of structures will broaden new perspectives for realizing high performance cathodes for MRBs.

关 键 词：Multi-electron reaction Mg batteries NASICON Na_(3)VCr_(0.5)Fe_(0.5)(PO_(4))_(3) Ironand chromium doping 

分 类 号：TM912[电气工程—电力电子与电力传动] TQ131.12[化学工程—无机化工]