Issue 8, 2019

High-performance spinel LiMn2O4@carbon core–shell cathode materials for Li-ion batteries

Abstract

A core–shell-type spinel LiMn2O4/carbon composite was synthesized by a simple and cost-effective mechanofusion method (dry particle coating) with a highly uniform coating. Electrochemical characterizations demonstrated that the surface-engineered core–shell-like material exhibited superior rate retention as well as cycling stability than pristine LMO due to improved intrinsic conductivity and easy electrolyte access. As a result, in the half-cell configuration, the core–shell carbon composite delivered reversible specific capacity of 103 mA h g−1 after 1000 cycles at 0.75C with 82% capacity retention; however, the pristine material showed specific capacity of 78 mA h g−1 and 76% capacity retention after 600 cycles. Similarly, in the full cell studies, the core–shell material exhibited 70% capacity retention, whereas the pristine material retained only 53% after 1000 cycles at 0.1 A g−1. The spinel LiMn2O4@carbon core–shell material obtained by the mechanofusion method may be a practical cathode material in high-performance lithium-ion batteries toward high energy applications.

Graphical abstract: High-performance spinel LiMn2O4@carbon core–shell cathode materials for Li-ion batteries

Supplementary files

Article information

Article type
Paper
Submitted
01 May 2019
Accepted
22 May 2019
First published
23 May 2019

Sustainable Energy Fuels, 2019,3, 1988-1994

High-performance spinel LiMn2O4@carbon core–shell cathode materials for Li-ion batteries

V. Selvamani, N. Phattharasupakun, J. Wutthiprom and M. Sawangphruk, Sustainable Energy Fuels, 2019, 3, 1988 DOI: 10.1039/C9SE00274J

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