Pseudocapacitance dominated Li_(3)VO_(4)encapsulated in N-doped graphene via 2D nanospace confined synthesis for superior lithium ion capacitors  

作　　者：Caili Yang Tao Long Ruotong Li Chunyang Wu Yuan-Li Ding 

机构地区：[1]National Key Laboratory of Electronic Thin Film and Integrated Devices,University of Electronic Science and Technology of China,Chengdu 611731,China [2]College of Materials Science and Engineering,Hunan University,Changsha 410082,China

出　　处：《Chinese Chemical Letters》2025年第2期512-517,共6页中国化学快报(英文版)

基　　金：financially supported by the National Natural Science Foundation of China(Nos.52001059,52072119);Hunan Provincial Natural Science Foundation(No.2023JJ50015);the 111 Project(No.D20015)。

摘　　要：A pseudocapacitance dominated anode material assembled from Li_(3)VO_(4)nanocrystals encapsulated in the interlayers of N-doped graphene has been developed via a facile 2D nanospace confined strategy for lithium ion capacitors(LICs).In this contribution,the N-doped graphene synthesized by a faicle solid state reaction using C_(3)N_(4)nanosheets as template and glucose as carbon source provides sufficient 2D nanospace for the confined and homogeneous growth of Li_(3)VO_(4)at the nanoscale,and simultaneously efficiently anchors each nanobuilding block inside the interlayers,thus realizing the utilizaiton of full potential of active components.The so-formed 3D hybrids not only ensure intimate electronic coupling between active materials and N-doped graphene,but also realize robust structure integrity.Owing to these unique advantages,the resulting hybrids show pseudocapacitance dominated lithium storage behaviors with capacitive contributions of over 90%at both low and high current rates.The LVO@C@NG delivers reversible capacities of 206 mAh/g at 10 A/g,capacity retention of 92.7%after 1000 cycles at 2 A/g,and a high energy density of 113.6 Wh/kg at 231.8 W/kg for LICs.

关 键 词：Lithium ion capacitor Li3VO4 GRAPHENE Anode PSEUDOCAPACITANCE 

分 类 号：TB383.1[一般工业技术—材料科学与工程] TM53[电气工程—电器]