Issue 16, 2024

Expanded graphite incorporated with Li4Ti5O12 nanoparticles as a high-rate lithium-ion battery anode

Abstract

Due to their small interlayer spacing and a low lithiation potential close to Li+ deposition, current graphite anodes suffer from weak kinetics, and lithium deposition in a fast-charging process, hindering their practical application in high-power lithium-ion batteries (LIBs). In this work, expanded graphite incorporated with Li4Ti5O12 nanoparticles (EG/LTO) was synthesized via moderate oxidization of artificial graphite following a solution coating process. The EG/LTO has sufficient porosity for fast Li+ diffusion and a dense Li4Ti5O12 layer for decreased interface reaction resistance, resulting in excellent fast-charging properties. EG/LTO presented a high reversible capacity of 272.8 mA h g−1 at 3.74 A g−1 (10C), much higher than that of the original commercial graphite (50.1 mA h g−1 at 10C) and even superior to that of hard carbon. In addition, EG/LTO exhibited capacity retention rate of 98.4% after 500 cycles at 10C, demonstrating high structural stability during a long cycling process. This study provides a protocol for a solution chemistry method to prepare fast-charging graphite anode materials with high stability for high-power LIBs.

Graphical abstract: Expanded graphite incorporated with Li4Ti5O12 nanoparticles as a high-rate lithium-ion battery anode

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Article information

Article type
Paper
Submitted
01 Feb 2024
Accepted
26 Mar 2024
First published
09 Apr 2024
This article is Open Access
Creative Commons BY-NC license

RSC Adv., 2024,14, 11276-11283

Expanded graphite incorporated with Li4Ti5O12 nanoparticles as a high-rate lithium-ion battery anode

J. Zhao, X. Zhu, W. Zhang, J. Qiu, F. Zhai, H. Zhang, G. Cao, S. Gao, F. Ding and Y. Xiang, RSC Adv., 2024, 14, 11276 DOI: 10.1039/D4RA00832D

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