Issue 2, 2018

High performance composites of spinel LiMn2O4/3DG for lithium ion batteries

Abstract

A highly crystalline nanosized spinel LiMn2O4/3DG composite cathode material for high rate lithium ion batteries was successfully prepared by mixing spinel LiMn2O4 particles with reduced graphene oxide (3DG). Spinel LiMn2O4 and reduced three-dimensional graphene oxide were synthesized using a hydrothermal method and freeze-drying technology, respectively. The structure, morphology and electrochemical performance of the synthesized materials were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), cyclic voltammetry (CV), electrochemical impedance spectroscopy (EIS) and galvanostatic charge–discharge techniques. The results showed that the LiMn2O4/3DG composites exhibited excellent rate capability and stable cycling performance. The discharge capacity was 131 mA h g−1 and the capacity remains at 89.3% after 100 cycles at a 0.5 C rate, while the discharge capacity was 90 mA h g−1 at 10 C. Compared with spinel LiMn2O4 materials, the LiMn2O4/3DG composites showed obvious improvement in electrochemical performance.

Graphical abstract: High performance composites of spinel LiMn2O4/3DG for lithium ion batteries

Article information

Article type
Paper
Submitted
20 Nov 2017
Accepted
11 Dec 2017
First published
03 Jan 2018
This article is Open Access
Creative Commons BY-NC license

RSC Adv., 2018,8, 877-884

High performance composites of spinel LiMn2O4/3DG for lithium ion batteries

X. D. Luo, Y. Z. Yin, M. Yuan, W. Zeng, G. Lin, B. Huang, Y. W. Li and S. H. Xiao, RSC Adv., 2018, 8, 877 DOI: 10.1039/C7RA12613A

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