Enhanced leaching of metals from spent lithium-ion batteries by catalytic carbothermic reduction  

作　　者：Ying-Chao Zhang Wen-Hao Yu Sheng-Ming Xu 

机构地区：[1]Institute of Nuclear and New Energy Technology,Tsinghua University,Beijing 100084,China [2]China National Petroleum&Chemical Planning Institute,Beijing 100013,China [3]Key Laboratory of Advanced Reactor Engineering and Safety of Ministry of Education,Tsinghua University,Beijing 100084,China [4]Beijing Key Lab of Fine Ceramics,Tsinghua University,Beijing 100084,China

出　　处：《Rare Metals》2023年第8期2688-2699,共12页稀有金属（英文版）

基　　金：financially supported by the National Key Research and Development Program of China(No.2018YFC1902205);the National Natural Science Foundation of China(Nos.51834008 and 52104398);China Postdoctoral Science Foundation(No.2022T150371)。

摘　　要：Spent Li-ion battery(LIB)recycling has become a challenge with the rapidly developing electric vehicle(EV)industry.To address the problems of high cost and low recovery of Li in the recycling of spent LIBs using traditional hydrometallurgical processes,we developed an alkali metal catalytic carbothermic reduction method to recover spent LiNi_(x)Co_(y)Mn_(z)O_(2)(NCM).Using alkali metal catalysts,such as NaOH,significantly reduced the temperature required for carbothermic NCM material reduction and realized targeted control of the phase of the reduction product,where Li was first separated by prior water leaching,followed by Ni,Co,and Mn recycling by acid leaching.The optimized carbothermic reduction conditions were a reaction time of 3 h,temperature of 550℃,NaOH dosage of 15 wt%,and graphite dosage of 15 wt%.The Li leaching efficiency reached 78.5 wt%during water leaching.And during acid leaching,the Ni,Co and Mn leaching efficiencies were 99.8 wt%,99.7 wt%,and 99.5wt%,respectively.This study provides strong technical support for the development of LIB industry.

关 键 词：Spent lithium-ion battery(LIB) Battery recycling LEACHING Lithium recovery Alkali metal catalytic carbothermic reduction 

分 类 号：TF803.21[冶金工程—有色金属冶金] X705[环境科学与工程—环境工程]