Solid-state synthesis of Li[Li0.2Mn0.56Ni0.16Co0.08]O2 cathode materials for lithium-ion batteries--颗粒学报PARTICUOLOGY

Hao, W., Zhan, H., Chen, H., Wang, Y., Tan, Q., & Su, F. (2014). Solid-state synthesis of Li[Li0.2Mn0.56Ni0.16Co0.08]O2 cathode materials for lithium-ion batteries. Particuology, 15, 18–26. https://doi.org/10.1016/j.partic.2013.01.004

Solid-state synthesis of Li[Li_0.2Mn_0.56Ni_0.16Co_0.08]O₂ cathode materials for lithium-ion batteries

Wenjuan Hao ^{a b}, Hanhui Zhan ^a, Han Chen ^b, Yanhong Wang ^b, Qiangqiang Tan ^b, Fabing Su ^b *

a School of Environment Science and Spatial Informatics, China University of Mining and Technology, Xuzhou 221116, China
b State Key Laboratory of Multiphase Complex Systems, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, China

10.1016/j.partic.2013.01.004

Volume 15, August 2014, Pages 18-26

Received 30 October 2012, Revised 25 December 2012, Accepted 8 January 2013, Available online 24 April 2013.

E-mail: fbsu@mail.ipe.ac.cn

Highlights

• Li[Li_0.2Mn_0.56Ni_0.16Co_0.08]O₂ was synthesized by solid-state method.

• Effects of calcination temperature, time, and quenching methods were investigated.

• Material synthesized at 800 °C for 12 h and quenched in air shows best electrochemical property.

Abstract

Layered Li[Li_0.2Mn_0.56Ni_0.16Co_0.08]O₂ cathode materials were synthesized via a solid-state reaction for Li-ion batteries, in which lithium hydroxide monohydrate, manganese dioxide, nickel monoxide, and cobalt monoxide were employed as metal precursors. To uncover the relationship between the structure and electrochemical properties of the materials, synthesis conditions such as calcination temperature and time as well as quenching methods were investigated. For the synthesized Li[Li_0.2Mn_0.56Ni_0.16Co_0.08]O₂ materials, the metal components were found to be in the form of Mn⁴⁺, Ni²⁺, and Co³⁺, and their molar ratio was in good agreement with stoichiometric ratio of 0.56:0.16:0.08. Among them, the one synthesized at 800 °C for 12 h and subsequently quenched in air showed the best electrochemical performances, which had an initial discharge specific capacity and coulombic efficiency of 265.6 mAh/g and 84.0%, respectively, and when cycled at 0.5, 1, and 2 C, the corresponding discharge specific capacities were 237.3, 212.6, and 178.6 mAh/g, respectively. After recovered to 0.1 C rate, the discharge specific capacity became 259.5 mAh/g and the capacity loss was only 2.3% of the initial value at 0.1 C. This work suggests that the solid-state synthesis route is easy for preparing high performance Li[Li_0.2Mn_0.56Ni_0.16Co_0.08]O₂ cathode materials for Li-ion batteries.

Graphical abstract

Keywords

Lithium-ion batteries; Cathode material; Solid-state synthesis; Lithium-rich material; Electrochemical properties

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