Volume 20, Issue 43 2402845
Research Article

Tailoring Stress-Relieved Structure for SnSe Toward High Performance Potassium Ion Batteries

Naiqing Ren

Naiqing Ren

CAS Key Laboratory of Precision and Intelligent Chemistry, Department of Materials Science and Engineering, University of Science and Technology of China, Hefei, Anhui, 230026 China

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Xiaoying Li

Xiaoying Li

CAS Key Laboratory of Precision and Intelligent Chemistry, Department of Materials Science and Engineering, University of Science and Technology of China, Hefei, Anhui, 230026 China

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Lifeng Wang

Lifeng Wang

CAS Key Laboratory of Precision and Intelligent Chemistry, Department of Materials Science and Engineering, University of Science and Technology of China, Hefei, Anhui, 230026 China

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Juntao Si

Juntao Si

CAS Key Laboratory of Precision and Intelligent Chemistry, Department of Materials Science and Engineering, University of Science and Technology of China, Hefei, Anhui, 230026 China

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Sihan Zeng

Sihan Zeng

CAS Key Laboratory of Precision and Intelligent Chemistry, Department of Materials Science and Engineering, University of Science and Technology of China, Hefei, Anhui, 230026 China

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Huaibing Liu

Huaibing Liu

CAS Key Laboratory of Precision and Intelligent Chemistry, Department of Materials Science and Engineering, University of Science and Technology of China, Hefei, Anhui, 230026 China

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Haiyan He

Haiyan He

CAS Key Laboratory of Precision and Intelligent Chemistry, Department of Materials Science and Engineering, University of Science and Technology of China, Hefei, Anhui, 230026 China

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Chunhua Chen

Corresponding Author

Chunhua Chen

CAS Key Laboratory of Precision and Intelligent Chemistry, Department of Materials Science and Engineering, University of Science and Technology of China, Hefei, Anhui, 230026 China

Email: [email protected]

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First published: 19 June 2024
Citations: 1

Abstract

Metal chalcogenides as an ideal family of anode materials demonstrate a high theoretical specific capacity for potassium ion batteries (PIBs), but the huge volume variance and poor cyclic stability hinder their practical applications. In this study, a design of a stress self-adaptive structure with ultrafine SnSe nanoparticles embedded in carbon nanofiber (SnSe@CNF) via the electrospinning technology is presented. Such an architecture delivers a record high specific capacity (272 mAh g−1 at 50 mA g−1) and high-rate performance (125 mAh g−1 at 1 A g−1) as a PIB anode. It is decoded that the fundamental understanding for this great performance is that the ultrafine SnSe particles enhance the full utilization of the active material and achieve stress relief as the stored strain energy from cycling is insufficient to drive crack propagation and thus alleviates the intrinsic chemo-mechanical degradation of metal chalcogenides.

Conflict of Interest

The authors declare no conflict of interest.

Data Availability Statement

The data that support the findings of this study are available from the corresponding author upon reasonable request.

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