二氧化碳热处理退役锂离子电池石墨负极材料的电化学性能再生研究  

Electrochemical Performance Regeneration of Graphite Anode Materials from Retired Lithium-ion Batteries Treated with Carbon Dioxide Thermal Processing

作　　者：高芮芮 燕溪溪 张素娜[1] 乔永民 刘震 应思斌 王利军[1,4] Gao Ruirui;Yan Xixi;Zhang Suna;Qiao Yongmin;Liu Zhen;Ying Sibin;Wang Lijun(School of Energy and Materials,Shanghai Polytechnic University,Shanghai,201209;Chenzhou Shanshan New Material Co.,Ltd.,Hu'nan,423400;Zhejiang Xinlixiang Technology Co.,Ltd.,Zhejiang,311607;Nantong Fumi New Material Technology Co.,Ltd.,Jiangsu,226200)

机构地区：[1]上海第二工业大学能源与材料学院,上海201209 [2]郴州杉杉新材料有限公司,湖南423400 [3]浙江新锂想科技有限责任公司,浙江311607 [4]南通复米新材料科技有限公司,江苏226200

出　　处：《当代化工研究》2024年第23期67-69,共3页Modern Chemical Research

基　　金：郴州2022年国家可持续发展议程创新示范区建设省级专项“微晶石墨锂电负极材料关键技术综合应用”(项目编号:2022sfq26)。

摘　　要：采用柠檬酸对精细拆解退役锂离子电池(Lithium-ion Batteries,LIBs)得到的极片进行剥离,得到废弃石墨(Spent Graphite,SG),利用二氧化碳对SG进行热处理,探究了不同温度下二氧化碳对石墨结构及其电化学性能的影响。采用X射线衍射仪(X-ray Diffractometer,XRD)、电感耦合等离子体(Inductively Coupled Plasma,ICP)、全自动微孔分析仪(Brunauer-Emmett-Teller,BET)和锂电池测试系统等对废弃石墨提纯样品进行结构表征和电化学性能测试。结果表明,在500℃下得到的再生石墨电化学性能最优,首次放电容量可达342.35 mAh/g,相当于商业石墨负极材料的性能。We employed citric acid to delaminate the electrodes obtained from meticulously disassembled retired lithiumion batteries(LIBs),yielding spent graphite(SG).Subsequently,we subjected SG to thermal treatment using carbon dioxide to investigate the impact of varying temperatures on the graphite structure and its electrochemical performance.Characterization of the purified spent graphite samples was conducted using an X-ray diffractometer(XRD),inductively coupled plasma(ICP),fully automatic micropore analyzer(BET),and a lithium battery testing system to assess structural and electrochemical properties.The findings revealed that the regenerated graphite obtained at 500℃exhibited the optimal electrochemical performance,with an initial discharge capacity of 342.35 mAh/g,which is comparable to the performance of commercial graphite anode materials.

关 键 词：资源回收 退役锂离子电池 二氧化碳 热处理 电化学性能 

分 类 号：TM912[电气工程—电力电子与电力传动]