期刊
MATERIALS LETTERS
卷 291, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.matlet.2021.129419
关键词
Energy storage and conversion; Microstructure; Nanocomposites; Iron organic framework; Metal sulfides; Fe1-xS/SC
资金
- National Nature Science Foundation of China [U1904198]
- Henan science and technology public relations project [192102310467]
- Key scientific project of Higher education of Henan province [18A140028]
Metal sulfides are popular in energy storage systems due to their high theoretical capacity and readily available raw materials. However, obstacles need to be overcome before their application in potassium ion batteries. Fe1-xS/SC nanosheets exhibit excellent electrochemical performance as an anode for PIBs, with high reversible capacity and super rate performance.
Metal sulfides are popular in energy storage system for unique advantages, including high theoretical capacity and readily available raw materials. However, there are some obstacles to overcome before application in potassium ion batteries (PIBs). Huge changes in volume during insertion/extraction of K+, which will cause the structure destruction of the electrode and lead to rapid decay of capacity. In addition, due to the poor electrical conductivity of Fe1-xS, the rate performance is always poor. Herein, Fe1-xS/ S-doped carbon nanosheets (Fe1-xS/SC) were synthesized. When applied Fe1-xS/SC as anode for PIBs, it exhibits excellent electrochemical performance: a reversible capacity of 430 mAh g(-1) can be maintained at 50 mA g(-1) after 300 cycles, a super rate performance of 255 and 170 mAh g(-1) at 1000 and 2000 mA g(-1) can be observed. (C) 2021 Published by Elsevier B.V.
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