文献类型：期刊文献

英文题名：Confined construction of porous conductive framework Na3V2(PO4)3 nanocrystals and their ultrahigh rate and microtherm sodium storage performance

作者：Jiang, Nan[1];Chen, Long[1];Wang, Yitao[1];Jiang, Hao[1];Hu, Yanjie[1];Li, Chunzhong[1]

机构：[1]East China Univ Sci & Technol, Sch Mat Sci & Engn, Shanghai Environm Friendly Mat Tech Serv Platform, Key Lab Ultrafine Mat,Minist Educ, Shanghai 200237, Peoples R China

年份：2022

卷号：262

外文期刊名：CHEMICAL ENGINEERING SCIENCE

收录：;EI(收录号：20223612689757);WOS:【SCI-EXPANDED(收录号:WOS:000863103500012)】；

基金：This work was supported by the National Natural Science Foun-dation of China (21978088, 91534202, 51673063), Program of Shanghai Academic/Technology Research Leader (20XD1433600), the Program for Professor of Special Appointment (Eastern Scholar) at Shanghai Institutes of High Learning,and the Fundamental Research Funds for the Central Universities (222201718002), 2019 Shanghai "Science and Technology Innovation Action Plan" technical standard project (19DZ2205300).

语种：英文

外文关键词：Microtherm; Cathode; Sodium ion battery; Power density

摘要：Sodium-ion batteries have been extensively studied due to their high safety and high natural abundance characteristics. Na3V2(PO4)(3) (NVP) cathode materials, which have extraordinary rate performance and cycle stability, have become among the most promising cathode materials for commercialization. However, due to their low conductivity problem, it is still a serious challenge to develop a nanocrystalline and uniform conductive frame structure. This work reports a confinement reaction strategy derived from the chelation reaction, which can successfully realize electrode materials with adjustable internal NVP grains. The obtained ultrasmall grained carbon frame material showed to have ultrahigh rate performance, and it could reach 101 mAh g(-1) at 100C and 100 mA h g(-1) after 1800 cycles at 10C rate (capacity retention rate 99%). Moreover, it showed the characteristics of excellent low-temperature performance, and no capacity degradation at -20 & DEG;C after 1000 cycles. (c) 2022 Published by Elsevier Ltd.