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Issue 21, 2020
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Solvent-free synthesis of morphology-controllable nickel sulfides via one-pot plasma reactions for high-performance lithium-ion batteries

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Abstract

Nickel sulfides (NS) occupy a vital position in the fields of catalysis and energy storage by virtue of their outstanding functional properties. Currently, NS are usually synthesized by solid-state sulfidation and gas-sulfidation methods that require long preparation periods and high energy consumption and wet chemistry approaches involving toxic reagents or solvents and tedious processing steps. Here, taking advantage of microwave plasma triggered by corona discharge, NS with controllable morphology can be synthesized in an ordinary household microwave oven within minutes via a solvent-free one-pot plasma reaction. The plasma with inherent high energy can significantly accelerate the reaction kinetics, thereby shortening the synthetic process and cutting the energy costs. When used as freestanding lithium-ion battery cathodes, the synthesized stone-forest-like NS deliver high rate capacity and superior cycling stability simultaneously. This green method can also realize morphology-controllable synthesis of copper sulfides, and it can be foreseen that this eco-friendly, high-efficiency and low-cost strategy can be extended to other metal sulfides and other metal compounds such as phosphides, carbides and selenides, opening new avenues for green synthesis and materials design.

Graphical abstract: Solvent-free synthesis of morphology-controllable nickel sulfides via one-pot plasma reactions for high-performance lithium-ion batteries

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Article information


Submitted
29 Jun 2020
Accepted
22 Sep 2020
First published
23 Sep 2020

Green Chem., 2020,22, 7460-7467
Article type
Paper

Solvent-free synthesis of morphology-controllable nickel sulfides via one-pot plasma reactions for high-performance lithium-ion batteries

Y. Yang, J. Wang, C. Wang, R. Guan, D. Lu, S. Zhao, S. Liu and X. Bian, Green Chem., 2020, 22, 7460
DOI: 10.1039/D0GC02208J

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