锂离子电池负极石墨再生  

Regeneration of Negative Graphite in Lithium-Ion Batteries

作　　者：陈宇 周游 李强 王皓 Chen Yu;Zhou You;Li Qiang;Wang Hao(Guangdong Brunp Recycling Technology Co.,Ltd.,Foshan 528100,China;Key Laboratory of Battery Recycling in Guangdong Province,Foshan 528100,China;Yichang Brunp Recycling Technology Co.,Ltd.,Yichang 443000,China;Yichang Green and Low-carbon Key Laboratory of Battery Recycling,Yichang 443000,China)

机构地区：[1]广东邦普循环科技有限公司,广东佛山528100 [2]广东省电池循环利用重点实验室,广东佛山528100 [3]宜昌邦普循环科技有限公司,湖北宜昌443000 [4]宜昌市电池循环与绿色低碳重点实验室,湖北宜昌443000

出　　处：《广东化工》2025年第6期34-37,共4页Guangdong Chemical Industry

摘　　要：锂离子电池负极石墨回收再生的影响因素包括无机和有机类杂质的残余、石墨晶体和颗粒的破坏、处理工艺与参数等。对影响负极石墨回收再生的因素进行了研究,通过酸洗去除金属类无机杂质,通过筛分-分级-热处理降低有机类杂质的影响,通过石墨化和包覆碳化修复石墨晶体和颗粒的破坏,优化了除杂和修复的工艺参数。结果表明,在50 g/L-50 g/L的盐酸-硫酸混酸酸洗除杂和添加4%沥青包覆碳化修复的优选条件下,再生石墨成品的首次充放电效率高达94%,具有优异的电化学性能。The influencing factors of graphite recycling and regeneration of lithium-ion battery anode include the residue of inorganic and organic impurities,the destruction of graphite crystals and particles,and the treatment process and parameters.The factors affecting the recovery and regeneration of graphite from the anode were studied,the inorganic impurities of metals were removed by pickling,the influence of organic impurities was reduced by sieving-classifying-heat treatment,the damage of graphite crystals and particles was repaired by graphitization and carbonization,and the process parameters of impurity removal and repair were optimized.The results show that the first charge-discharge efficiency of the regenerative graphite product is as high as 94%and has excellent electrochemical performance under the preferred conditions of 50 g/L-50 g/L hydrochloric acid-sulfuric acid mixed acid pickling to remove impurities and adding 4%asphalt coating for carbonization repair.

关 键 词：废旧石墨 石墨再生 电池回收 除杂 修复 

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