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Issue 15, 2018

Three-dimensional carbon network confined antimony nanoparticle anodes for high-capacity K-ion batteries

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Abstract

Antimony (Sb) represents a promising anode for K-ion batteries (KIBs) due to its high theoretical capacity and suitable working voltage. However, the large volume change that occurs in the potassiation/depotassiation process can lead to severe capacity fading. Herein, we report a high-capacity anode material by in situ confining Sb nanoparticles in a three-dimensional carbon framework (3D SbNPs@C) via a template-assisted freeze-drying treatment and subsequent carbothermic reduction. The as-prepared 3D SbNPs@C hybrid material delivers high reversible capacity and good cycling stability when used as the anode for KIBs. Furthermore, cyclic voltammetry and in situ X-ray diffraction analysis were performed to reveal the intrinsic mechanism of a K–Sb alloying reaction. Therefore, this work is of great importance to understand the electrochemical process of the Sb-based alloying reaction and will pave the way for the exploration of high performance KIB anode materials.

Graphical abstract: Three-dimensional carbon network confined antimony nanoparticle anodes for high-capacity K-ion batteries

Supplementary files

Article information


Submitted
10 Jan 2018
Accepted
07 Mar 2018
First published
08 Mar 2018

Nanoscale, 2018,10, 6820-6826
Article type
Communication

Three-dimensional carbon network confined antimony nanoparticle anodes for high-capacity K-ion batteries

C. Han, K. Han, X. Wang, C. Wang, Q. Li, J. Meng, X. Xu, Q. He, W. Luo, L. Wu and L. Mai, Nanoscale, 2018, 10, 6820 DOI: 10.1039/C8NR00237A

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