Impact of lithium excess on the structural and electrochemical properties of the LiNi0.5Mn1.5O4 high-voltage cathode material

Yu-Feng Deng; Shi-Xi Zhao; Peng-Yuan Zhai; Guozhong Cao; Ce-Wen Nan

doi:10.1039/C5TA06339F

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Impact of lithium excess on the structural and electrochemical properties of the LiNi_0.5Mn_1.5O₄ high-voltage cathode material†

Yu-Feng Deng,^ab Shi-Xi Zhao,*^ab Peng-Yuan Zhai,^ab Guozhong Cao^c and Ce-Wen Nan^b

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* Corresponding authors

^a Graduate School at Shenzhen, Tsinghua University, Shenzhen 518055, China
E-mail: zhaosx@sz.tsinghua.edu.cn

^b School of Materials Science and Engineering, Tsinghua University, Beijing 100084, China

^c Department of Materials Science and Engineering, University of Washington, Seattle, WA 98195, USA

Abstract

LiNi_0.5Mn_1.5O₄-based cathode materials are synthesized by a one-step nonaqueous co-precipitation method. Appropriate excess lithium ions can extrude transition metal ions out of tetrahedral 8a sites, which could have a higher effect on the rate performance of LiNi_0.5Mn_1.5O₄ than the well-known factor, i.e. cationic order degree in 16d octahedral sites.

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Article information

DOI: https://doi.org/10.1039/C5TA06339F
Article type: Communication
Submitted: 12 Aug 2015
Accepted: 10 Sep 2015
First published: 14 Sep 2015

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J. Mater. Chem. A, 2015,3, 20103-20107

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Impact of lithium excess on the structural and electrochemical properties of the LiNi_0.5Mn_1.5O₄ high-voltage cathode material

Y. Deng, S. Zhao, P. Zhai, G. Cao and C. Nan, J. Mater. Chem. A, 2015, 3, 20103 DOI: 10.1039/C5TA06339F

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Journal of Materials Chemistry A