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CuGaS2 nanoplates: a robust and self-healing anode for Li/Na ion battery in wide temperature range of 268-318 K

Abstract

The practical application of power batteries in electric vehicles (EVs) and hybrid electric vehicles (HEVs) system is hindered by the narrow operating temperature range due to the degradation of solid-electrolyte interface (SEI) layer at high temperature and poor ion/electron diffusion kinetics at low temperature. Herein, we firstly report CuGaS2 hexagonal nanoplates as novel and robust anode material working in a wide temperature range. CuGaS2 nanoplates with lateral size of 2-3 μm and thickness of 180-200 nm have been successfully synthesized by a vapor thermal transformation from its oxide counterpart CuGaO2. The thermal workability of as-syntheiszed CuGaS2 is benifited from the synergistic effect including high conductivity of copper and the self-healing nature of liquid metal gallium. The room temperature performance of CuGaS2 as lithium ion battery anode electrode exhibits a high reversible capacity over 521 mAh g-1 after 600 cycles at a high current density of 5 A g-1. Furthermore, as temperature lifted to 318 K, the CuGaS2 electrode exhibits a stable and reversible capacity over 784 mAh g-1 a high current density of 0.5 A g-1; even at the low-temperature of 268 K, a reversible capacity over 407 mAh g-1 can be realized, which is much superior to that of the commercial graphite anode.

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Publication details

The article was received on 19 Oct 2017, accepted on 04 Dec 2017 and first published on 06 Dec 2017


Article type: Paper
DOI: 10.1039/C7TA09197D
Citation: J. Mater. Chem. A, 2017, Accepted Manuscript
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    CuGaS2 nanoplates: a robust and self-healing anode for Li/Na ion battery in wide temperature range of 268-318 K

    Y. Song, Y. Li, Z. Lin , Z. Pan, Y. Jiang, P. Wang, Y. Zhou, F. Fang, L. Hu and D. Sun, J. Mater. Chem. A, 2017, Accepted Manuscript , DOI: 10.1039/C7TA09197D

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