Cathode properties of a controlled crystallinity nano-Li1.2Cr0.4Mn0.4O2 cathode for lithium ion batteries

Ayuko Kitajou; Shohei Matsuda; Koji Ohara; Kazutaka Ikeda; Shunsuke Muto

doi:10.1039/D4MR00051J

Cathode properties of a controlled crystallinity nano-Li_1.2Cr_0.4Mn_0.4O₂ cathode for lithium ion batteries†

Ayuko Kitajou,

*^a Shohei Matsuda,^a Koji Ohara,^b Kazutaka Ikeda^c and Shunsuke Muto

^de

Author affiliations

* Corresponding authors

^a Graduate School of Sciences and Technology for Innovation, Yamaguchi University, 2-16-1 Tokiwadai, Ube, Yamaguchi 755-8611, Japan
E-mail: kitajou@yamaguchi-u.ac.jp

^b Faculty of Materials for Energy, Shimane University, 1060, Nishikawatsu-Cho, Matsue, Shimane, Japan

^c Institute of Materials Structure Science, High Energy Accelerator Research Organization (KEK), Tokai, Ibaraki 319-1106, Japan

^d Graduate School of Engineering, Nagoya University, Furo-cho, Chikusa-ku, Nagoya, Aichi 464-8603, Japan

^e Advanced Measurement Technology Center, Institute of Materials and Systems for Sustainability, Nagoya University, Furo-cho, Chikusa-ku, Nagoya, Aichi 464-8603, Japan

Abstract

The milled-Li_1.2Cr_0.4Mn_0.4O₂ (milled-LCMO) cathode, a promising material for next-generation Li ion batteries, is prepared by dry ball-milling of layered rocksalt-type Li_1.2Cr_0.4Mn_0.4O₂ (layered-LCMO) obtained by solid-state synthesis. Despite undergoing ball-milling treatment, resulting in separation into Cr-rich and Mn-rich phases along with Li₂O, milled-LCMO still exhibited a reversible capacity of 277 mA h g⁻¹ at a rate of 16 mA g⁻¹. However, it was also revealed that its cyclability was poor due to the contribution of oxygen redox in the charging process. On the other hand, layered-LCMO exhibited better cyclability because charge and discharge reactions proceeded only through the Cr redox. The thermally treated Li_1.2Cr_0.4Mn_0.4O₂ was prepared as a cathode material that combines the favorable properties of these two materials. In fact, each thermally treated sample showed a larger reversible capacity than the layered-LCMO obtained by the solid-phase method, and the cyclability recovered as the heat treatment temperature increased.

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Article information

DOI: https://doi.org/10.1039/D4MR00051J
Article type: Paper
Submitted: 16 Maijs 2024
Accepted: 30 Sept. 2024
First published: 08 Okt. 2024
This article is Open Access

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RSC Mechanochem., 2025, Advance Article

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Cathode properties of a controlled crystallinity nano-Li_1.2Cr_0.4Mn_0.4O₂ cathode for lithium ion batteries

A. Kitajou, S. Matsuda, K. Ohara, K. Ikeda and S. Muto, RSC Mechanochem., 2025, Advance Article , DOI: 10.1039/D4MR00051J

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