Title

S-Doped Carbon-Coated FeS2/C@C Nanorods for Potassium Storage

Publication Name

Acta Metallurgica Sinica (English Letters)

Abstract

Potassium-ion batteries (PIBs) are promising scalable energy storage system; however, one of the challenges for its potential application is the huge volume variations during cycling due to the insertion/extraction of large size potassium ions. Here, we fabricated the S-doped carbon-coated rod-like FeS /C@C, which not only effectively alleviate the volume variations upon cycling but also can improve electrical conductivity and maintain the structural integrity. As an anode material for PIBs, the rod-like FeS /C@C electrodes delivered excellent rate performance (175 mA h g at 0.5 A g ) and stable cycle performance (262 mA h g after 100 cycles at 0.1 A g ). The superior excellent performance is associated with the unique structure of FeS /C@C. The as-synthesized FeS /C@C is demonstrated to be a potential anode for PIBs. 2 2 2 2 −1 −1 −1 −1

Open Access Status

This publication is not available as open access

Volume

34

Issue

3

First Page

321

Last Page

328

Funding Number

51302079

Funding Sponsor

National Natural Science Foundation of China

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Link to publisher version (DOI)

http://dx.doi.org/10.1007/s40195-020-01050-y