The Effects of Incorporated Sn in Resynthesized Ni-Rich Cathode Materials on Their Lithium-Ion Battery Performance

被引:18
作者
Kang, Hee [1 ,2 ]
Lee, Ko-woon [2 ]
Kwon, Kyungjung [1 ]
Song, Junho [2 ]
机构
[1] Sejong Univ, Dept Energy & Mineral Resources Engn, 209 Neungdong Ro, Seoul 05006, South Korea
[2] Korea Elect Technol Inst, 25 Saenari Ro, Seongnam Si 13509, Gyeonggi Do, South Korea
关键词
lithium-ion battery; cathode; recycling; Sn; ELECTROCHEMICAL PERFORMANCE; METAL VALUES; RECOVERY; SEPARATION; RECYCLE; WASTES; COBALT;
D O I
10.3390/met7100395
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
LiNixCoyMnz (NCM), one of the most promising candidates for high-capacity cathode materials in Li-ion batteries (LIBs), is synthesized with various amounts of Sn. Sn-incorporated NCM from the resynthesis of NMC in leach liquor containing Sn from spent LIBs is characterized by scanning electron microscopy, energy-dispersive X-ray spectroscopy, X-ray diffraction, X-ray photoelectron spectroscopy, particle strength tests, and electrochemical tests. Sn-incorporated NCM has a globular form, and the uniform distribution of Sn inside cathode materials is confirmed. As Sn is introduced, the (003) diffraction peak tends to shift to a smaller angle and particle breaking strength increases. It is found that Sn-incorporated cathode active materials have better cycle performance and rate capability than pristine cathode active material although the discharge capacity slightly decreases. Because there is a trade-off between decreased discharge capacity and improved cycling and rate performance, the incorporation of Sn in resynthesized NCM should be carefully designed and conducted.
引用
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页数:11
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