Low-temperature synthesized Li4Mn5O12-like cathode with hybrid cation- and anion-redox capacities

Yang Liu; Guang Liu; Hui Xu; Yuheng Zheng; Yunhui Huang; Sa Li; Ju Li

doi:10.1039/C9CC02006C

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Low-temperature synthesized Li₄Mn₅O₁₂-like cathode with hybrid cation- and anion-redox capacities†

Yang Liu,^ab Guang Liu,^ab Hui Xu,^ab Yuheng Zheng,^ab Yunhui Huang,^ab Sa Li*^ab and Ju Li

*^c

Author affiliations

* Corresponding authors

^a School of Materials Science and Engineering, Tongji University, Shanghai 201804, China
E-mail: lisa@tongji.edu.cn

^b Institute of New Energy for Vehicles, Tongji University, Shanghai 201804, China

^c Department of Nuclear Science and Engineering and Department of Materials Science and Engineering, Massachusetts Institute of Technology, Cambridge, MA 02139, USA
E-mail: liju@mit.edu

Abstract

The Li-rich spinel Li₄Mn₅O₁₂ (Li(Mn_5/3Li_1/3)O₄) historically only shows a reversible cation-redox reaction, with a theoretical capacity of 135.5 mA h g⁻¹. However, we found that a simple 400 °C solid-state synthesis method gives a Li₄Mn₅O₁₂-like nanoparticulate cathode that yields significant reversible hybrid cation- and anion-redox capacities. A high specific capacity of 212 mA h g⁻¹ was achieved. The reversible anion-redox contribution is attributed to the tiny particle size (<10 nm), which facilitates electron tunneling, and a possible random solid-solution in the Li(Mn_5/3Li_1/3)O₄ lattice due to the low synthesis temperature.

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Article information

DOI: https://doi.org/10.1039/C9CC02006C
Article type: Communication
Submitted: 12 Mar 2019
Accepted: 25 Apr 2019
First published: 26 Apr 2019
This article is Open Access

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Chem. Commun., 2019,55, 8118-8121

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Low-temperature synthesized Li₄Mn₅O₁₂-like cathode with hybrid cation- and anion-redox capacities

Y. Liu, G. Liu, H. Xu, Y. Zheng, Y. Huang, S. Li and J. Li, Chem. Commun., 2019, 55, 8118 DOI: 10.1039/C9CC02006C

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