Issue 44, 2021

Hierarchical microstructure constructed with graphitic carbon-coated Ni3S2 nanoparticles anchored on N-doped mesoporous carbon nanoflakes for optimized sodium storage

Abstract

A hierarchical microstructure constructed with graphitic-carbon-coated Ni3S2 nanoparticles anchored on N-doped mesoporous carbon nanoflakes was fabricated using a nickel-based micro–nano structure as a precursor and polydopamine as a carbon source. By optimizing the microstructure, the obtained Ni3S2/carbon composite compounded with the thickest carbon nanoflakes delivers ultrafast and stable Na-ion storage performance, and can maintain a reversible charge capacity of 372 mA h g−1 at a current density of 5 A g−1 over 250 cycles, and 316 mA h g−1 even at a current density of 20 A g−1 for 2000 cycles. These remarkable electrochemical properties can be attributed to its hierarchical microstructure of graphitic-carbon-coated Ni3S2 particles and N-doped mesoporous carbon nanoflakes, which provide easy accessibility to the electrolyte, fast electron transport and Na+ diffusion, and even relieve the strain caused by the volume expansion upon cycling.

Graphical abstract: Hierarchical microstructure constructed with graphitic carbon-coated Ni3S2 nanoparticles anchored on N-doped mesoporous carbon nanoflakes for optimized sodium storage

Supplementary files

Article information

Article type
Paper
Submitted
23 Aug 2021
Accepted
23 Oct 2021
First published
25 Oct 2021

Nanoscale, 2021,13, 18734-18740

Hierarchical microstructure constructed with graphitic carbon-coated Ni3S2 nanoparticles anchored on N-doped mesoporous carbon nanoflakes for optimized sodium storage

J. Xu, Q. Sun, H. Chen, W. Yan and P. Lu, Nanoscale, 2021, 13, 18734 DOI: 10.1039/D1NR05539A

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