Overcharge to Remove Cathode Passivation Layer for Reviving Failed Li–O_(2)Batteries  

作　　者：Kai Chen Dong-Yue Yang Jin Wang Gang Huang Xin-Bo Zhang 

机构地区：[1]State Key Laboratory of Rare Earth Resource Utilization,Changchun Institute of Applied Chemistry,Chinese Academy of Sciences,Changchun 130022 [2]School of Applied Chemistry and Engineering,University of Science and Technology of China,Hefei 230026

出　　处：《CCS Chemistry》2023年第3期641-653,共13页中国化学会会刊（英文）

基　　金：This work was financially supported by the National Natural Science Foundation of China(21725103);National Key R&D Program of China(2020YFE0204500);Key Research Program of the Chinese Academy of Sciences(ZDRW-CN-2021-3);Changchun Science and Technology Development Plan Funding Project(21ZY06);K.C.Wong Education Foundation(GJTD-2018-09).

摘　　要：Prolonging the lifetime of batteries is a long-term pursuit,and it is also one of the prerequisites for the practical application of batteries.However,this endeavor is challenging for high-energy Li–O_(2)batteries due to their poor charge efficiency and cathode passivation-induced by-products accumulation.Here,we demonstrated that overcharging Li–O_(2)batteries could facilitate the decomposition of accumulated residue products and revive the cathode;thus,the battery lifespan could be significantly extended.This long battery lifetime not only made full use of the Li anode but also enabled the battery to recycle in a safer way without the risk of firing and explosion.Furthermore,overcharge could be used in Li–O_(2)batteries with high mass loading,high rate,and large capacity.This overcharge strategy simplified the cathode regenerating procedures and realized system-level efficient use of battery components,thereby prolonging the life of Li–O_(2)batteries to meet the requirements of practical applications.

关 键 词：OVERCHARGE Li-O_(2)battery battery life REVIVE battery failure mechanism 

分 类 号：TM912[电气工程—电力电子与电力传动]