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NiS2 nanoparticles anchored on open carbon nanohelmets as an advanced anode for lithium-ion batteries

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Abstract

Low intrinsic conductivity and large volume expansion seriously restrict the efficient lithium storage performance of metal sulfides. Here, we fabricate a hybrid material of NiS2 nanoparticles/carbon nanohelmets (NiS2/CNHs) to address the above issues. As an anode material in lithium-ion batteries, NiS2/CNHs exhibit excellent cycling stability (490 mA h g−1 after 3000 cycles at 5 A g−1) and rate properties (412 mA h g−1 at 10 A g−1), outperforming other NiSx-based anode materials. These remarkable performances originate from the three-dimensional helmet-like integrated architecture of NiS2/CNHs, which reduces the electrode resistance due to the tight combination between NiS2 and CNHs, provides efficient diffusion paths for the electrolyte and Li+ owing to the amorphous nanoporous carbon structure, and significantly mitigates the aggregation and buffers the large volumetric expansion of NiS2 nanoparticles upon long-term cycling thanks to the open three-dimensional architecture and well-dispersed NiS2 nanoparticles on it.

Graphical abstract: NiS2 nanoparticles anchored on open carbon nanohelmets as an advanced anode for lithium-ion batteries

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Article information


Submitted
18 Oct 2019
Accepted
13 Dec 2019
First published
13 Dec 2019

This article is Open Access

Nanoscale Adv., 2020, Advance Article
Article type
Paper

NiS2 nanoparticles anchored on open carbon nanohelmets as an advanced anode for lithium-ion batteries

D. D. Yang, M. Zhao, R. D. Zhang, Y. Zhang, C. C. Yang and Q. Jiang, Nanoscale Adv., 2020, Advance Article , DOI: 10.1039/C9NA00661C

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