Volume 18, Issue 41 2204005
Research Article

Cobalt Nanoparticles Loaded on MXene for Li-S Batteries: Anchoring Polysulfides and Accelerating Redox Reactions

Qinhua Gu

Qinhua Gu

Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences, Shenyang, 110016 China

School of Materials Science and Engineering, University of Science and Technology of China, Shenyang, 110016 China

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Yujie Qi

Yujie Qi

Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences, Shenyang, 110016 China

School of Materials Science and Engineering, University of Science and Technology of China, Shenyang, 110016 China

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Junnan Chen

Junnan Chen

Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences, Shenyang, 110016 China

School of Materials Science and Engineering, University of Science and Technology of China, Shenyang, 110016 China

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Ming Lu

Corresponding Author

Ming Lu

Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences, Shenyang, 110016 China

Key Laboratory of Preparation and Application of Environmental Friendly Materials of the Ministry of Education, The Joint Laboratory of MXene Materials, Key Laboratory of Functional Materials Physics and Chemistry of the Ministry of Education, Jilin Normal University, Changchun, 130103 China

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

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Bingsen Zhang

Corresponding Author

Bingsen Zhang

Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences, Shenyang, 110016 China

School of Materials Science and Engineering, University of Science and Technology of China, Shenyang, 110016 China

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

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First published: 12 September 2022
Citations: 13

Abstract

Catalysis is regarded as an effective strategy to fundamentally increase sulfur utilization, accelerating the kinetics of the transformation between lithium polysulfides (LiPSs) and lithium sulfide (Li2S) on a substrate. However, the intermodulation of catalysts and sulfur species is elusive, which is limited to the comprehensive analysis of electrochemical performance in the dynamic reaction process. Herein, cobalt nanoparticles loaded on MXene nanosheets (Co/Ti2C) are selected as sulfur hosts and the representative catalyst. By combining ex situ electrochemical results and interfacial structural chemical monitoring, the catalysis process of Co/Ti2C toward LiPSs conversion is revealed, and the outstanding performance originates from the optimization of chemical adsorption, catalytic activity, and lithium-ion transfer behaviors, which is based on electronic/ion modulation and sufficient interfaces among catalysts and electrolyte. This work can guide the construction of electronic modulation at triple-phase interface catalysis to overcome the shuttle effect and facilitate sulfur redox kinetics in Li-S batteries.

Conflict of Interest

The authors declare no conflict of interest.

Data Availability Statement

Research data are not shared.

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