Synthesizing core-shell Ni-rich LiNi_(x)Co_(y)Mn_(z)O_(2) from spent Li-ion battery leachate  

作　　者：Seongdeock Jeong Sanghyuk Park Dongwoo Kim Gyeongbin Ko Wooseok Kim Sungkyu Kim Sungho Ban Haeun Lee Yonghoon Kim Kyungjung Kwon 

机构地区：[1]Department of Energy and Mineral Resources Engineering,Sejong University,Gwangjin-gu,Seoul 05006,Republic of Korea [2]Autonomous Intelligent Unmanned Flying Vehicles Institute,Sejong University,Gwangjin-gu,Seoul 05006,Republic of Korea [3]Department of Nanotechnology&Advanced Materials Engineering,Sejong University,Gwangjin-gu,Seoul 05006,Republic of Korea [4]Battery Cell Development Team,Hyundai Motor Company,Hwaseong-si,Gyeonggi-do 18280,Republic of Korea

出　　处：《Journal of Energy Chemistry》2024年第12期128-138,共11页能源化学（英文版）

基　　金：supported by Basic Science Research Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Science and ICT (2023R1A2C100571511,RS-2023-00254424);the Ministry of Education(2020R1A6A1A03038540)。

摘　　要：As the global electric vehicle market continues to grow,the recycling of Li-ion battery (LIB) becomes more important worldwide and the resynthesis of cathode materials would be the most value-added recycling approach taking into account limited metal resources.Although resynthesized homogenous LiNi_(x)Co_(y)Mn_(z)O_(2)(NCM) from spent LIB leachate shows comparable battery performance to pristine NCM from virgin materials,there is general concern in its cycling performance.Here,we synthesize core–shell(CS) Ni-rich NCM,which consists of Ni-rich NCM as the core and NCM derived from the original or purified leachate of spent LIBs as the shell.Resynthesized CS Ni-rich NCM exhibits improved rate capability resulting from expanded interslab thickness in the NCM structure.CS Ni-rich NCM from purified LIB leachate shows improvement in cycling performance and thermal stability.It specifically delivers a capacity retention of 86.6%at a high temperature after 80 cycles compared to that (75.0%) of pristine CS Ni-rich NCM.These improvements are caused by a relatively high Mg content on the shell and the widespread distribution of Al through the CS structure.CS Ni-rich NCM derived from spent LIB leachate provides a new alternative approach to conventional LIB recycling methods,which would utilize efficiently limited metal resources for the sustainable LIB production.

关 键 词：Li-ion battery Recycling LEACHATE NCM CORE-SHELL 

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