Suppressing transition metal dissolution and deposition in lithium-ion batteries using oxide solid electrolyte coated polymer separator  

作　　者：Zhao Yan Hongyi Pan Junyang Wang Rusong Chen Fei Luo Xiqian Yu Hong Li 闫昭;潘弘毅;汪君洋;陈汝颂;罗飞;禹习谦;李泓(Beijing Advanced Innovation Center for Materials Genome Engineering,Institute of Physics,Chinese Academy of Sciences,Beijing 100190,China;School of Physical Sciences,University of Chinese Academy of Sciences,Beijing 100049,China;Yangtze River Delta Physics Research Center Co.,Ltd.,Liyang 213300,China;Tianmulake Excellent Anode Materials Co.,Ltd.,Liyang 213300,China)

机构地区：[1]Beijing Advanced Innovation Center for Materials Genome Engineering,Institute of Physics,Chinese Academy of Sciences,Beijing 100190,China [2]School of Physical Sciences,University of Chinese Academy of Sciences,Beijing 100049,China [3]Yangtze River Delta Physics Research Center Co.,Ltd.,Liyang 213300,China [4]Tianmulake Excellent Anode Materials Co.,Ltd.,Liyang 213300,China

出　　处：《Chinese Physics B》2020年第8期495-500,共6页中国物理B（英文版）

基　　金：the National Key R&D Program of China(Grant No.2016YFB0100100);the National Natural Science Foundation of China(Grant Nos.51822211,U1932220,U1964205,and U19A2018).

摘　　要：The dissolution of transition metal(TM)cations from oxide cathodes and the subsequent migration and deposition on the anode lead to the deconstruction of cathode materials and uncontrollable growth of solid electrode interphase(SEI).The above issues have been considered as main causes for the performance degradation of lithium-ion batteries(LIBs).In this work,we reported that the solid oxide electrolyte Li1.5Al0.5Ti1.5(PO4)3(LATP)coating on polyethylene(PE)polymer separator can largely block the TM dissolution and deposition in LIBs.Scanning electron microscopy(SEM),second ion mass spectroscopy(SIMS),and Raman spectroscopy characterizations reveal that the granular surface of the LATP coating layer is converted to a dense morphology due to the reduction of LATP at discharge process.The as-formed dense surface layer can effectively hinder the TM deposition on the anode electrode and inhibit the TM dissolution from the cathode electrode.As a result,both the LiCoO2/SiO-graphite and LiMn2O4/SiO-graphite cells using LATP coated PE separator show substantially enhanced cycle performances compared with those cells with Al2O3 coated PE separator.

关 键 词：transition metal dissolution CATHODE lithium-ion batteries solid electrolyte SEPARATOR 

分 类 号：TQ317[化学工程—高聚物工业] TM912[电气工程—电力电子与电力传动]