Regeneration and reuse of anode graphite from spent lithium-ion batteries with low greenhouse gas (GHG) emissions  

作　　者：Junjie Liu Hui Shi Ke Yu Yanni Geng Xingyu Hu Genping Yi Jianzhi Zhang Xubiao Luo 

机构地区：[1]National-Local Joint Engineering Research Center of Heavy Metals Pollutants Control and Resource Utilization,Nanchang Hangkong University,Nanchang 330063,China [2]Key Laboratory of Jiangxi Province for Persistent Pollutants Control and Resources Recycle,Nanchang Hangkong University,Nanchang 330063,China [3]School of Environment and Energy,Shenzhen Graduate School,Peking University,Shenzhen 518055,China [4]State Key Lab of Urban Water Resource and Environment,School of Civil and Environmental Engineering,Harbin Institute of Technology Shenzhen,Shenzhen 518055,China

出　　处：《Chinese Chemical Letters》2023年第10期111-115,共5页中国化学快报（英文版）

基　　金：financially supported by the National Key Research and Development Program of China(No.2019YFC1907900);the National Natural Science Foundation of China(Nos.52125002 and 52100043);the National Science Foundation of Jiangxi Province(No.20202BABL213037)。

摘　　要：Regenerating spent graphite(SG)from retired lithium-ion batteries(LIBs)can effectively avoid resource waste.However,the technology is challenged by the impurity content and energy consumption.In this study,micro-expanded graphite(MEG)was synthesized by one-step oxidation method using waste LIBs anode graphite as material and perchloric acid as intercalation and oxidant agent.Then,its performance as a LIBs anode material were investigated as well as the greenhouse gas(GHG)emissions of the whole process were calculated.Perchloric acid was successfully embedded in the SG during the reaction,which effectively removed the impurities in the graphite.Defects introduced during intercalation and delamination,such as nanopores and intercrystalline cracks.Both provide additional space for Li ions during charging and discharging,thereby promoting capacity enhancement.The prepared MEG expresses a rate capability as high as 340.32 m Ah/g at a current density of 0.1 C and still retains 81.73%of the capacity after 100 cycles at a current density of 1 C.Additionally,the GHG emissions of the synthesis process of this article and other literatures are compared.The results demonstrated that perchloric acid treatment process provides a low-carbon,time-and energy-saving approach for regenerated SG as battery grade material.

关 键 词：Spent graphite Retired lithium-ion batteries Greenhouse gas emissions Regenerated Perchloric acid Micro-expanded graphite 

分 类 号：TQ127.11[化学工程—无机化工] X705[环境科学与工程—环境工程]