废旧LiCoO_(2)材料再生LiNi_(0.8)Co_(0.1)Mn_(0.1)O_(2)正极材料及性能  

Regeneration Process of LiNi_(0.8)Co_(0.1)Mn_(0.1)O_(2)Cathode Material from Spent LiCoO_(2) Batteries and Its Performance

作　　者：吴彤[1] 王官格 刘博睿 巩珊珊 黄擎 苏岳锋[1,2] Wu Tong;Wang Guange;Liu Borui;Gong Shanshan;Huang Qing;Su Yuefeng(School of Materials Science and Engineering,Beijing Institute of Technology,Beijing 100081,China;Chongqing Innovation Center,Beijing Institute of Technology,Chongqing 401135,China)

机构地区：[1]北京理工大学材料学院,北京100081 [2]北京理工大学重庆创新中心,重庆401135

出　　处：《稀有金属材料与工程》2021年第9期3256-3261,共6页Rare Metal Materials and Engineering

基　　金：国家自然科学基金(21875022,U1664255);国家重点研发计划(2016YFB0100301)。

摘　　要：以废旧LiCoO_(2)电池为原料,通过预处理、酸浸、共沉淀步骤,实现了LiNi_(0.8)Co_(0.1)Mn_(0.1)O_(2)正极材料的再生。ICP-OES分析浸出液中的元素含量,SEM和XRD表征材料形貌和结构,扣式电池的电化学测试定量分析材料的电化学性能。研究表明,利用浸出液可以再生与空白形貌相似和层状结构良好的正极材料(R-NCM),(R-NCM)在0.2C、2.8~4.3V电压范围内进行充放电循环测试,首周放电比容量可达到210.8mAh/g,经过50周充放电循环后放电比容量仍有183 mAh/g,容量保持率为87%,表现出良好的循环稳定性,为废旧锂离子电池的再生提供支撑并指出发展方向。LiNi_(0.8)Co_(0.1)Mn_(0.1)O_(2) cathode material was re-synthesized from discard LiCoO_(2) batteries by pre-treatment, acid leaching and co-precipitation.The concentration of metal ion in leachate was analyzed by ICP-OES, the morphology and structure of cathode materials were characterized by the SEM and XRD, and the electrochemical properties of coin batteries were performed by the electrochemical tests. The results show that the regenerated material(R-NCM) from acid leaching lixivium exhibits the desired morphology and well layer structure. Under the condition of 2.8~4.3 V, the initial discharge capacity of R-NCM is 210.8 m Ah/g at 0.2 C. After 50 cycles, the discharge capacity and capacity retention of re-synthesized cathode material are 183 mAh/g, 87%, respectively, showing good cycle performance, providing support and development direction for the regeneration of used lithium-ion batteries.

关 键 词：废旧LiCoO_(2)电池 酸浸出 再生 LiNi_(0.8)Co_(0.1)Mn_(0.1)O_(2)正极材料 回收 

分 类 号：TM912.9[电气工程—电力电子与电力传动]