Volume 63, Issue 48 e202408906
Research Article

P-doped RuSe2 on Porous N-Doped Carbon Matrix as Catalysts for Accelerated Sulfur Redox Reactions

Dr. Bin Li

Dr. Bin Li

School of Chemistry and Chemical Engineering, Shandong University, Jinan, 250100 P. R. China

Contribution: Writing - original draft (lead), Writing - review & editing (lead)

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Dr. Peng Wang

Dr. Peng Wang

School of Chemistry and Chemical Engineering, Shandong University, Jinan, 250100 P. R. China

Contribution: Writing - review & editing (supporting)

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Dr. Jia Yuan

Dr. Jia Yuan

School of Chemistry and Chemical Engineering, Shandong University, Jinan, 250100 P. R. China

Contribution: Writing - review & editing (supporting)

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Dr. Ning Song

Dr. Ning Song

School of Chemistry and Chemical Engineering, Shandong University, Jinan, 250100 P. R. China

Contribution: Writing - review & editing (supporting)

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Prof. Jinkui Feng

Prof. Jinkui Feng

School of Materials Science and Engineering, Shandong University, Jinan, 250061 P. R. China

Contribution: Writing - review & editing (supporting)

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Prof. Shenglin Xiong

Corresponding Author

Prof. Shenglin Xiong

School of Chemistry and Chemical Engineering, Shandong University, Jinan, 250100 P. R. China

Contribution: Conceptualization (lead), Funding acquisition (lead), Project administration (lead), Writing - review & editing (lead)

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Prof. Baojuan Xi

Corresponding Author

Prof. Baojuan Xi

School of Chemistry and Chemical Engineering, Shandong University, Jinan, 250100 P. R. China

Contribution: Conceptualization (equal), Formal analysis (lead), Funding acquisition (equal), Writing - original draft (equal), Writing - review & editing (lead)

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First published: 28 August 2024
Citations: 17

Graphical Abstract

A new catalyst of phosphorus doped RuSe2 (P-RuSe2) with the enhanced conductivity and the modulation of the d-band center is engineered via a rational screening strategy, which augments its effectiveness in interacting with LiPSs and hence exhibits enhanced electrochemical performance in terms of high capacity, superior rate capability and stable cycle life.

Abstract

Monocomponent catalysts exhibit the limited catalytic conversion of polysulfides due to their intrinsic electronic structure, but their catalytic activity can be improved by introducing heteroatoms to regulate its electronic structure. However, the rational selection principles of doping elements remain unclear. Here, we are guided by theoretical calculations to select the suitable doping elements based on the balanced relationship between the adsorption strength of lithium polysulfides (LiPSs) and catalytic activity of lithium sulfide. We apply the screening method to develop a new catalyst of phosphorus doped RuSe2, manifesting the further enhanced conductivity compared with original RuSe2, facilitating charge transfer and further modulating the d-band center of RuSe2, thereby augmenting its effectiveness in interacting with LiPSs. Consequently, the assembled cell exhibits an areal capacity of 7.7 mAh cm−2, even under high sulfur loading of 8.0 mg cm−2 and a lean electrolyte condition (5.0 μL mg−1). This rational screening strategy offers a robust solution for the design of advanced catalysts in the field of lithium-sulfur batteries and potentially other domains as well.

Conflict of Interests

The authors declare no conflict of interest.

Data Availability Statement

Research data are not shared.

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