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Well-ordered spherical LiNi0.8Co0.1Mn0.1O2 cathode material for lithium-ion batteries

Published online by Cambridge University Press:  11 November 2019

Gai Yang ,
Xianzhong Qin Open the ORCID record for Xianzhong Qin [Opens in a new window] ,
Bo Wang ,
Feipeng Cai  and
Jian Gao
Gai Yang
Affiliation:
Shandong Academy of Sciences, Energy Research Institute, Qilu University of Technology, Jinan 250014, China
Xianzhong Qin*
Affiliation:
Shandong Academy of Sciences, Energy Research Institute, Qilu University of Technology, Jinan 250014, China
Bo Wang
Affiliation:
Shandong Academy of Sciences, Energy Research Institute, Qilu University of Technology, Jinan 250014, China
Feipeng Cai
Affiliation:
Shandong Academy of Sciences, Energy Research Institute, Qilu University of Technology, Jinan 250014, China
Jian Gao*
Affiliation:
New Energy Martials Laboratory, Sichuan Changhong Electric Co., Ltd., Chengdu, Sichuan 610041, China
*
a)Address all correspondence to these authors. e-mail: [email protected]
b)e-mail: [email protected]
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Abstract

Nickel-rich layered oxide LiNi0.8Co0.1Mn0.1O2 suffers from severe structural instability and irreversible capacity loss during cycling due to cation disorder of Li+ and Ni2+. To solve this problem, the precursor Ni0.8Co0.1Mn0.1(OH)2 and well-ordered LiNi0.8Co0.1Mn0.1O2 cathode materials were successfully synthesized via controlled crystallization and high-temperature solid-state methods. The structure, morphology, and electrochemical performance of the precursor and LiNi0.8Co0.1Mn0.1O2 powders were investigated. The results show that the precursor Ni0.8Co0.1Mn0.1(OH)2 is made of sphere-like particles composed of needle-like primary crystal and LiNi0.8Co0.1Mn0.1O2 possesses a perfect layered structure with low Li/Ni disorder. Electrochemical data demonstrate that the material rate capabilities are 203.3, 187.7, 170.4, and 163 mA h/g from 0.1C to 10C, respectively. The capacity retention is 87.9% after 100 cycles at 1C, even the cut-off voltage was increased to 4.5 V. The high discharge capacity and outstanding cycling life can be attributed to the merits of a perfect crystal lattice with low Li/Ni disorder, fast lithium ion transport, and relatively low charge transfer resistance.

Keywords

chemical synthesiselectronic materialcrystallographic structure
Type
Article
Information
Journal of Materials Research , Volume 35 , Issue 1: Focus Section: Advances in Battery Technology: Material Innovations in Design and Fabrication , 14 January 2020 , pp. 51 - 57
Copyright
Copyright © Materials Research Society 2019 

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