Environmental and economic assessment of structural repair technologies for spent lithium-ion battery cathode materials  

作　　者：Jiao Lin Jiawei Wu Ersha Fan Xiaodong Zhang Renjie Chen Feng Wu Li Li 

机构地区：[1]Beijing Key Laboratory of Environmental Science and Engineering,School of Materials Science and Engineering,Beijing Institute of Technology,Beijing 100081,China [2]Guangdong Key Laboratory of Battery Safety,Guangzhou Institute of Energy Testing,Guangzhou 511447,China [3]Collaborative Innovation Center of Electric Vehicles in Beijing,Beijing 100081,China [4]Advanced Technology Research Institute,Beijing Institute of Technology,Jinan 250300,China

出　　处：《International Journal of Minerals,Metallurgy and Materials》2022年第5期942-952,共11页矿物冶金与材料学报（英文版）

基　　金：supported by the National Natural Science Foundation of China (Nos. 51972030 and 51772030);the S&T Major Project of Inner Mongolia Autonomous Region in China (No. 2020ZD0018);the Beijing Outstanding Young Scientists Program (No. BJJWZYJH01201910007023);the Guangdong Key Laboratory of Battery Safety (No. 2019B121203008)

摘　　要：The existing recycling and regeneration technologies have problems,such as poor regeneration effect and low added value of products for lithium(Li)-ion battery cathode materials with a low state of health.In this work,a targeted Li replenishment repair technology is proposed to improve the discharge-specific capacity and cycling stability of the repaired LiCoO_(2) cathode materials.Compared with the spent cathode material with>50%Li deficiency,the Li/Co molar ratio of the regenerated LiCoO_(2) cathode is>0.9,which completely removes the Co_(3)O_(4) impurity phase formed by the decomposition of LixCoO_(2) in the failed cathode material after repair.The repaired LiCoO_(2) cathode mater-ials exhibit better cycling stability,lower electrochemical impedance,and faster Li^(+)diffusion than the commercial materials at both 1 and 10 C.Meanwhile,Li_(1.05)CoO_(2) cathodes have higher Li replenishment efficiency and cycling stability.The energy consumption and greenhouse gas emissions of LiCoO_(2) cathodes produced by this repair method are significantly reduced compared to those using pyrometallurgical and hydro-metallurgical recycling processes.

关 键 词：spent lithium-ion batteries structural repair solid-phase sintering process environmental and economic assessment 

分 类 号：TQ131.11[化学工程—无机化工] TM912[电气工程—电力电子与电力传动]