材料科学
锂(药物)
烧结
球磨机
阴极
晶体结构
化学工程
X射线吸收精细结构
电化学
电解质
矿物学
冶金
结晶学
化学
电极
光谱学
物理化学
内分泌学
工程类
物理
医学
量子力学
作者
Ying-Qian Han,Yong You,Hou Chen,Xiang Xiao,Yiran Xing,Yujuan Zhao
出处
期刊:Journal of The Electrochemical Society
[The Electrochemical Society]
日期:2021-04-01
卷期号:168 (4): 040525-040525
被引量:26
标识
DOI:10.1149/1945-7111/abf4e8
摘要
Efficient and environmentally-friendly methods are needed to recycle spent power lithium-ion batteries. In this research, a simple solid-state method without secondary pollution is used to directly recover the cathode material from spent power lithium-ion batteries. The recycled LiNi 0.5 Co 0.2 Mn 0.3 O 2 (S-LNCM) crystal cathode material was activated by high-energy ball-milling after pre-heating to remove C and F elements derived from the electrolyte. In situ high-temperature XRD was used to explore the crystal regeneration process of the recycled materials during sintering. The XRD refinement results and TEM images indicated that serious cation mixing was reduced, and phase transitions on the surface of the spent material restored its layered structure. XAFS spectra showed that the coordination structure of the regenerated materials was almost the same as that of a commercial material. The first discharge capacity of the regenerated materials (LNCM-950, 140 mAh g −1 , 0.2 C) was much higher than that of the spent materials (10 mAh g −1 , 0.2 C), and the cyclic stability (97%) was higher than that of the commercial material (91%) at 0.2 C after 50 cycles. These results show that simple solid-state method combined with high-energy ball-milling can be used to easily repair the crystal structure and electrochemical performance of spent LiNi 0.5 Co 0.2 Mn 0.3 O 2 material.
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