Issue 1, 2017

Ni3S2 nanosheet-anchored carbon submicron tube arrays as high-performance binder-free anodes for Na-ion batteries

Abstract

Owing to the increasing concerns regarding limited lithium reserves, sodium-ion batteries (SIBs) have attained worldwide attention in recent years. However, there is still a challenge to find suitable anodes for SIBs with high capacity and a long cycle life. In this work, we propose a unique feather-like array-type anode composed of thin Ni3S2 nanosheets anchored on cracked carbon submicron tubes (CSTs) on a porous Ni foam substrate. The porous structure of the Ni foam facilitates electrode wetting by the electrolyte. The voids in between the Ni3S2/CST arrays provide free space for buffering volume changes upon sodiation/desodiation. The CSTs not only act as the support for Ni3S2 growth but also uniformly disperse the Ni3S2 nanosheets, leading to high capacity and good capacity retention. The Ni-supported Ni3S2/CSTs can deliver a high initial reversible capacity of 887 mA h g−1 at 50 mA g−1. The reversible capacity can be kept at 212 mA h g−1 after 260 cycles. This work will shed light on the design of high-performance SIB anodes.

Graphical abstract: Ni3S2 nanosheet-anchored carbon submicron tube arrays as high-performance binder-free anodes for Na-ion batteries

Supplementary files

Article information

Article type
Research Article
Submitted
01 Aug 2016
Accepted
22 Nov 2016
First published
23 Nov 2016

Inorg. Chem. Front., 2017,4, 131-138

Ni3S2 nanosheet-anchored carbon submicron tube arrays as high-performance binder-free anodes for Na-ion batteries

X. Xia, J. Xie, S. Zhang, B. Pan, G. Cao and X. Zhao, Inorg. Chem. Front., 2017, 4, 131 DOI: 10.1039/C6QI00286B

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