文献类型：期刊文献

英文题名：A Novel Perovskite Electron-Ion Conductive Coating to Simultaneously Enhance Cycling Stability and Rate Capability of Li1.2Ni0.13Co0.13Mn0.54O2 Cathode Material for Lithium-Ion Batteries

作者：Gao, Mingxi[1,2];Yan, Chenhui[1,2];Shao, Qinong[1,2];Chen, Jian[3];Zhang, Chenyang[4];Chen, Gairong[4];Jiang, Yinzhu[1,2];Zhu, Tiejun[1,2];Sun, Wenping[1,2];Liu, Yongfeng[1,2];Gao, Mingxia[1,2];Pan, Hongge[1,2]

第一作者：Gao, Mingxi

通讯作者：Gao, MX[1];Pan, HG[1];Gao, MX[2];Pan, HG[2]

机构：[1]Zhejiang Univ, State Key Lab Silicon Mat, Hangzhou 310027, Peoples R China;[2]Zhejiang Univ, Sch Mat Sci & Engn, Hangzhou 310027, Peoples R China;[3]Xian Technol Univ, Inst Sci & Technol New Energy, Xian 710021, Peoples R China;[4]Xinxiang Univ, Coll Chem & Chem Engn, Xinxiang 453003, Henan, Peoples R China

第一机构：Zhejiang Univ, State Key Lab Silicon Mat, Hangzhou 310027, Peoples R China

通讯机构：[1]corresponding author), Zhejiang Univ, State Key Lab Silicon Mat, Hangzhou 310027, Peoples R China;[2]corresponding author), Zhejiang Univ, Sch Mat Sci & Engn, Hangzhou 310027, Peoples R China.

年份：2021

卷号：17

期号：19

外文期刊名：SMALL

收录：;WOS:【SCI-EXPANDED(收录号:WOS:000632868900001)】；

基金：The authors gratefully acknowledge the financial support from the National Natural Science Foundation (Grant Nos. 51571178, 51831009, and U1601212), the National Materials Genome Project (Grant No. 2016YFB0700600), the Science and Technology Program of Zhejiang Province, China (Grant No. 2017C31085), and the Aerospace Innovation Fund of Shanghai (SAST2016116).

语种：英文

外文关键词：cycling stability and rate capability; electron; ion mixed conductive coating; Li; and Mn; rich oxide cathode materials; lithium; ion batteries; Nd; 0; 6Sr; 0; 4CoO; 3

摘要：Poor cycling stability and rate capability are two key issues needing to be solved for Li- and Mn-rich oxide cathode material for lithium-ion batteries (LIBs). Herein, a novel perovskite electron-ion mixed conductor Nd0.6Sr0.4CoO3 (NSCO) is used as the coating layer on Li1.2Ni0.13Co0.13Mn0.54O2 (LNCMO) to simultaneously enhance its cycling stability and rate capability. By coating 3 wt% NSCO, LNCMO-3NSCO exhibits an optimal cycling performance with a capacity retention of 99% at 0.1C (1C = 200 mA g(-1)) after 60 cycles, 91% at 1C after 300 cycles, and 54% at 20C after 1000 cycles, much better than 78%, 63%, and 3% of LNCMO, respectively. Even at a high charge and discharge rate of 50C, LNCMO-3NSCO exhibits a discharge capacity of 53 mAh g(-1) and a mid-point discharge voltage of 2.88 V, much higher than those of LNCMO (24 mA h g(-1) and 2.40 V, respectively). Benefiting from the high electronic conductivity (1.46 S cm(-1)) and ionic conductivity (1.48 x 10(-7) S cm(-1)), NSCO coating not only suppresses transition metals dissolution and structure transformation, but also significantly enhances electronic conductivity and Li+ diffusion coefficient of LNCMO by an order of magnitude.