Volume 39, Issue 7 pp. 1878-1884
Concise Report

Double-Coated Fe2N@TiO2@C Yolk-Shell Submicrocubes as an Advanced Anode for Potassium-Ion Batteries

Yichen Du

Yichen Du

Jiangsu Key Laboratory of New Power Batteries, Jiangsu Collaborative Innovation Center of Biomedical Functional Materials, School of Chemistry and Materials Science, Nanjing Normal University, Nanjing, Jiangsu, 210023 China

These authors contributed equally to this work.

Dedicated to the Special Issue of Nanostructured Materials for Electrochemical Energy Conversion and Storage.

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Wangsuo Weng

Wangsuo Weng

Jiangsu Key Laboratory of New Power Batteries, Jiangsu Collaborative Innovation Center of Biomedical Functional Materials, School of Chemistry and Materials Science, Nanjing Normal University, Nanjing, Jiangsu, 210023 China

These authors contributed equally to this work.

Dedicated to the Special Issue of Nanostructured Materials for Electrochemical Energy Conversion and Storage.

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Zhuangzhuang Zhang

Zhuangzhuang Zhang

Jiangsu Key Laboratory of New Power Batteries, Jiangsu Collaborative Innovation Center of Biomedical Functional Materials, School of Chemistry and Materials Science, Nanjing Normal University, Nanjing, Jiangsu, 210023 China

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Yanan He

Yanan He

Jiangsu Key Laboratory of New Power Batteries, Jiangsu Collaborative Innovation Center of Biomedical Functional Materials, School of Chemistry and Materials Science, Nanjing Normal University, Nanjing, Jiangsu, 210023 China

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Jingyi Xu

Jingyi Xu

Jiangsu Key Laboratory of New Power Batteries, Jiangsu Collaborative Innovation Center of Biomedical Functional Materials, School of Chemistry and Materials Science, Nanjing Normal University, Nanjing, Jiangsu, 210023 China

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Tian Yang

Tian Yang

Jiangsu Key Laboratory of New Power Batteries, Jiangsu Collaborative Innovation Center of Biomedical Functional Materials, School of Chemistry and Materials Science, Nanjing Normal University, Nanjing, Jiangsu, 210023 China

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Jianchun Bao

Corresponding Author

Jianchun Bao

Jiangsu Key Laboratory of New Power Batteries, Jiangsu Collaborative Innovation Center of Biomedical Functional Materials, School of Chemistry and Materials Science, Nanjing Normal University, Nanjing, Jiangsu, 210023 China

E-mail: [email protected]; [email protected]Search for more papers by this author
Xiaosi Zhou

Corresponding Author

Xiaosi Zhou

Jiangsu Key Laboratory of New Power Batteries, Jiangsu Collaborative Innovation Center of Biomedical Functional Materials, School of Chemistry and Materials Science, Nanjing Normal University, Nanjing, Jiangsu, 210023 China

E-mail: [email protected]; [email protected]Search for more papers by this author
First published: 08 March 2021
Citations: 13

Main observation and conclusion

Rationally designing inexpensive iron nitrides that have large conductivity, high theoretical capacity, and rapid ionic diffusion kinetics is of great importance for realizing their practical application in potassium-ion batteries. In this work, we have constructed double-shelled Fe2N@TiO2@C yolk-shell submicrocubes with porous Fe2N yolk as an anode material for stable and high-rate capability potassium-ion batteries. This special structure can effectively buffer the large volume variation of electrode during cycling, supply abundant reaction sites to host potassium ions, and enhance electronic conductivity of the electrode material. Benefiting from these structural and compositional advantages, the Fe2N@TiO2@C yolk-shell submicrocube anode delivers high specific capacity, long-term cyclability, and remarkable rate property.image

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