Improving the Electrochemical Performance of Ni-Rich LiNi0.8Co0.1Mn0.1O2 by Enlarging the Li Layer Spacing

doi:10.1002/ente.201700939

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	Improving the Electrochemical Performance of Ni-Rich LiNi0.8Co0.1Mn0.1O2 by Enlarging the Li Layer Spacing
	Wu, Kang; Jia, Guofeng; Shangguan, Xuehui; Yang, Guowei; Zhu, Zenghu; Peng, Zhengjun; Zhuge, Qin; Li, Faqiang; Cui, Xiaoling; Liu, Suqin
	2018-10
发表期刊	ENERGY TECHNOLOGY
ISSN	2194-4288
卷号	6 期号:10 页码:1885-1893
摘要	Ni-rich cathode materials have high capacities but exhibit serious capacity attenuation. Therefore, a strategy for modifying a LiNi0.8Co0.1Mn0.1O2 cathode material by Na doping of the Li+ sites is proposed to improve its electrochemical performance. In this work, Li1-xNaxNi0.8Co0.1Mn0.1O2 (x=0, 0.01, 0.03) materials are synthesized by a co-precipitation and solid-state sintering method, and their structures and electrochemical properties are analyzed. X-ray diffraction (XRD) results suggest that all the prepared materials have a typical hexagonal layered structure with no impurities. The spacing of the Li layers increases from 2.59251 angstrom to 2.59805 angstrom, which shows that a small amount of larger Na ions (0.102 nm) occupy the Li sites (0.076 nm). Additionally, electrochemical measurements show that the high-rate performance and cycling stability are significantly improved when some of the Li+ sites in LiNi0.8Co0.1Mn0.1O2 are occupied by Na+. Specifically, the capacity retention of Li0.99Na0.01Ni0.8Co0.1Mn0.1O2 is 91 % after 100 cycles at a rate of 10 C. Meanwhile, the mechanism about electrochemical performance was improved by doping Na+ into Li+ sites of LiNi0.8Co0.1Mn0.1O2 has been further discussed.
DOI	10.1002/ente.201700939
引用统计
文献类型	期刊论文
条目标识符	http://ir.isl.ac.cn/handle/363002/34488
专题	盐湖资源与化学实验室
推荐引用方式 GB/T 7714	Wu, Kang,Jia, Guofeng,Shangguan, Xuehui,et al. Improving the Electrochemical Performance of Ni-Rich LiNi0.8Co0.1Mn0.1O2 by Enlarging the Li Layer Spacing[J]. ENERGY TECHNOLOGY,2018,6(10):1885-1893.
APA	Wu, Kang.,Jia, Guofeng.,Shangguan, Xuehui.,Yang, Guowei.,Zhu, Zenghu.,...&Liu, Suqin.(2018).Improving the Electrochemical Performance of Ni-Rich LiNi0.8Co0.1Mn0.1O2 by Enlarging the Li Layer Spacing.ENERGY TECHNOLOGY,6(10),1885-1893.
MLA	Wu, Kang,et al."Improving the Electrochemical Performance of Ni-Rich LiNi0.8Co0.1Mn0.1O2 by Enlarging the Li Layer Spacing".ENERGY TECHNOLOGY 6.10(2018):1885-1893.

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