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Issue 11, 2017, Issue in Progress
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In situ synthesis of homogeneous Ce2S3/MoS2 composites and their electrochemical performance for lithium ion batteries

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Abstract

Homogeneous Ce2S3/MoS2 composite have been fabricated via an in situ sulfurization method and their structure, morphology and electrochemical properties are researched systematically for the first time. Ce2S3/MoS2 composite present spherical secondary particles of 0.5–1 μm in diameter. The cycling performance and rate property of Ce2S3/MoS2 composite are better than those of Ce2S3 and MoS2 as anode materials for lithium ion batteries. Among them, Ce2S3/MoS2 composite (cationic ratio of Ce : Mo in 4 : 1) have an initial discharge capacity of 225.5 mA h g−1, a coulombic efficiency of 99.1% and a reversible capacity as high as 661.7 mA h g−1, a coulombic efficiency of 99.7% after 500 cycles at a current density of 100 mA g−1 and the highest discharge capacity of 285.6 mA h g−1 at a high current density of 1000 mA g−1, showing the best cycling performance and rate capability among the as-prepared Ce2S3/MoS2 composite. The reason is that the compositing between MoS2 and Ce2S3 can maintain the stability of the structure during the charge/discharge process and the existence of Ce2S3 enhances the electrical conductivity of Ce2S3/MoS2 composite and further improves the reversible capacities and rate performance of Ce2S3/MoS2 composite.

Graphical abstract: In situ synthesis of homogeneous Ce2S3/MoS2 composites and their electrochemical performance for lithium ion batteries

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Article information


Submitted
18 Dec 2016
Accepted
12 Jan 2017
First published
20 Jan 2017

This article is Open Access

RSC Adv., 2017,7, 6309-6314
Article type
Paper

In situ synthesis of homogeneous Ce2S3/MoS2 composites and their electrochemical performance for lithium ion batteries

B. Hou, X. Wang, J. Wang, J. Yao, H. Zhang, W. Yu, G. Liu, X. Dong and L. Wang, RSC Adv., 2017, 7, 6309
DOI: 10.1039/C6RA28352G

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