Volume 20, Issue 31 2312288
Research Article

Multifunctional Heterostructured Fe3O4-FeTe@MCM Electrocatalyst Enabling High-Performance Practical Lithium-Sulfur Batteries Via Built-in Electric Field

Yi-bo Gao

Yi-bo Gao

Key Laboratory for Ecological Metallurgy of Multimetallic Mineral (Ministry of Education), School of Metallurgy, Northeastern University, Shenyang, 110819 P. R. China

State Key Laboratory of Biochemical Engineering Institute of Process Engineering, Chinese Academy of Sciences; Key Laboratory of Biopharmaceutical Preparation and Delivery, Chinese Academy of Sciences, No. 1 Beierjie, Zhongguancun, Beijing, 100190 P. R. China

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Guo-qiang Liu

Corresponding Author

Guo-qiang Liu

Key Laboratory for Ecological Metallurgy of Multimetallic Mineral (Ministry of Education), School of Metallurgy, Northeastern University, Shenyang, 110819 P. R. China

Sichuan Vocational and Technical College, Suining, 629000 P. R. China

E-mail: [email protected]; [email protected]; [email protected]

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Hai-tao Geng

Hai-tao Geng

State Key Laboratory of Biochemical Engineering Institute of Process Engineering, Chinese Academy of Sciences; Key Laboratory of Biopharmaceutical Preparation and Delivery, Chinese Academy of Sciences, No. 1 Beierjie, Zhongguancun, Beijing, 100190 P. R. China

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Xin He

Xin He

State Key Laboratory of Biochemical Engineering Institute of Process Engineering, Chinese Academy of Sciences; Key Laboratory of Biopharmaceutical Preparation and Delivery, Chinese Academy of Sciences, No. 1 Beierjie, Zhongguancun, Beijing, 100190 P. R. China

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Xiang-ming Na

Corresponding Author

Xiang-ming Na

State Key Laboratory of Biochemical Engineering Institute of Process Engineering, Chinese Academy of Sciences; Key Laboratory of Biopharmaceutical Preparation and Delivery, Chinese Academy of Sciences, No. 1 Beierjie, Zhongguancun, Beijing, 100190 P. R. China

E-mail: [email protected]; [email protected]; [email protected]

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Fu-shuang Liu

Fu-shuang Liu

Key Laboratory for Ecological Metallurgy of Multimetallic Mineral (Ministry of Education), School of Metallurgy, Northeastern University, Shenyang, 110819 P. R. China

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Bao Li

Bao Li

Collaborative Innovation Center of Henan Province for Green Manufacturing of Fine Chemicals, Key Laboratory of Green Chemical Media and Reactions, Ministry of Education, School of Chemistry and Chemical Engineering, Henan Normal University, Xinxiang, 453007 P. R. China

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Bao Wang

Corresponding Author

Bao Wang

State Key Laboratory of Biochemical Engineering Institute of Process Engineering, Chinese Academy of Sciences; Key Laboratory of Biopharmaceutical Preparation and Delivery, Chinese Academy of Sciences, No. 1 Beierjie, Zhongguancun, Beijing, 100190 P. R. China

E-mail: [email protected]; [email protected]; [email protected]

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First published: 03 March 2024
Citations: 7

Abstract

The development of capable of simultaneously modulating the sluggish electrochemical kinetics, shuttle effect, and lithium dendrite growth is a promising strategy for the commercialization of lithium-sulfur batteries. Consequently, an elaborate preparation method is employed to create a host material consisting of multi-channel carbon microspheres (MCM) containing highly dispersed heterostructure Fe3O4-FeTe nanoparticles. The Fe3O4-FeTe@MCM exhibits a spontaneous built-in electric field (BIEF) and possesses both lithophilic and sulfophilic sites, rendering it an appropriate host material for both positive and negative electrodes. Experimental and theoretical results reveal that the existence of spontaneous BIEF leads to interfacial charge redistribution, resulting in moderate polysulfide adsorption which facilitates the transfer of polysulfides and diffusion of electrons at heterogeneous interfaces. Furthermore, the reduced conversion energy barriers enhanced the catalytic activity of Fe3O4-FeTe@MCM for expediting the bidirectional sulfur conversion. Moreover, regulated Li deposition behavior is realized because of its high conductivity and remarkable lithiophilicity. Consequently, the battery exhibited long-term stability for 500 cycles with 0.06% capacity decay per cycle at 5 C, and a large areal capacity of 7.3 mAh cm−2 (sulfur loading: 9.73 mg cm−2) at 0.1 C. This study provides a novel strategy for the rational fabrication of heterostructure hosts for practical Li-S batteries.

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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