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Issue 26, 2018
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Copper sulfide nanoparticles as high-performance cathode materials for magnesium secondary batteries

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Abstract

Magnesium secondary batteries are promising candidates for large-scale energy storage systems with high safety, because of the dendrite-free electrodeposition of the magnesium anode. However, the search for available cathode materials remains a significant challenge, hindering their development. In this work, we report copper sulfide nanoparticles as high-performance cathode materials for magnesium secondary batteries, which deliver a high reversible capacity of 175 mA h g−1 at 50 mA g−1. The cathode also shows an excellent rate capability providing 90 mA h g−1 at 1000 mA g−1 and an outstanding long-term cyclability over 350 cycles. The beneficial properties are ascribed to the small-sized copper sulfide particles which facilitate the solid-state diffusion kinetics. Further investigation on the mechanism demonstrates that the reaction is a typical conversion reaction, and the excellent cycling stability is due to the CuS nanoparticles which are not facile to aggregate during cycling. This work introduces an abundant, low-cost and high-performance cathode material for magnesium secondary batteries, and provides feasibility for the practical application of magnesium secondary battery systems in large-scale energy storage devices.

Graphical abstract: Copper sulfide nanoparticles as high-performance cathode materials for magnesium secondary batteries

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Publication details

The article was received on 25 Apr 2018, accepted on 04 Jun 2018 and first published on 04 Jun 2018


Article type: Paper
DOI: 10.1039/C8NR03375G
Citation: Nanoscale, 2018,10, 12526-12534
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    Copper sulfide nanoparticles as high-performance cathode materials for magnesium secondary batteries

    M. Wu, Y. Zhang, T. Li, Z. Chen, S. Cao and F. Xu, Nanoscale, 2018, 10, 12526
    DOI: 10.1039/C8NR03375G

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