Issue 27, 2018

Preparation of Sb nanoparticles in molten salt and their potassium storage performance and mechanism

Abstract

Sb nanoparticles with a size of 55 nm are fabricated via the reduction of SbCl3 by metallic Al in the molten salt of SbCl3 at 80 °C. In situ XRD patterns and ex situ Raman spectra show that the potassium storage mechanism is an alloying-type with the formation of a cubic K3Sb phase when fully potassiated and an amorphous phase when fully depotassiated. As an anode for potassium-ion batteries, Sb nanoparticles coated with graphene could deliver a reversible capacity of 381 mA h g−1 at 100 mA g−1, and maintain a capacity of 210 mA h g−1 at 500 mA g−1 for 200 cycles.

Graphical abstract: Preparation of Sb nanoparticles in molten salt and their potassium storage performance and mechanism

Supplementary files

Article information

Article type
Paper
Submitted
11 mei 2018
Accepted
21 jun 2018
First published
22 jun 2018

Nanoscale, 2018,10, 13236-13241

Preparation of Sb nanoparticles in molten salt and their potassium storage performance and mechanism

Z. Yi, N. Lin, W. Zhang, W. Wang, Y. Zhu and Y. Qian, Nanoscale, 2018, 10, 13236 DOI: 10.1039/C8NR03829E

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