Volume 21, Issue 24 2502257
Research Article

Optimizing Adsorption-Catalysis Synergy to Accelerate Sulfur Conversion Kinetics in Room-Temperature Na-S Batteries

Yujie Shi

Yujie Shi

School of Materials and Energy, and LONGi Institute of Future Technology, Lanzhou University, Lanzhou, 730000 China

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Limou Zhang

Limou Zhang

School of Materials and Energy, and LONGi Institute of Future Technology, Lanzhou University, Lanzhou, 730000 China

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Ting Wang

Ting Wang

School of Materials and Energy, and LONGi Institute of Future Technology, Lanzhou University, Lanzhou, 730000 China

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Runze Ma

Runze Ma

School of Materials and Energy, and LONGi Institute of Future Technology, Lanzhou University, Lanzhou, 730000 China

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Dongjiao Wang

Dongjiao Wang

School of Materials and Energy, and LONGi Institute of Future Technology, Lanzhou University, Lanzhou, 730000 China

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Yujun Fu

Yujun Fu

School of Materials and Energy, and LONGi Institute of Future Technology, Lanzhou University, Lanzhou, 730000 China

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RuiPu Du

RuiPu Du

School of Materials and Energy, and LONGi Institute of Future Technology, Lanzhou University, Lanzhou, 730000 China

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Junfei Zhang

Junfei Zhang

School of Materials and Energy, and LONGi Institute of Future Technology, Lanzhou University, Lanzhou, 730000 China

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Dequan Liu

Dequan Liu

School of Materials and Energy, and LONGi Institute of Future Technology, Lanzhou University, Lanzhou, 730000 China

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Liang Wu

Liang Wu

School of Mathematics and Physics, Lanzhou Jiaotong University, Lanzhou, 730000 China

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Weihan Li

Corresponding Author

Weihan Li

Department of Mechanical and Materials Engineering, Western University, London, Ontario, N6A 5B9 Canada

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

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Ying Wu

Corresponding Author

Ying Wu

School of Materials and Energy, and LONGi Institute of Future Technology, Lanzhou University, Lanzhou, 730000 China

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

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Deyan He

Corresponding Author

Deyan He

School of Materials and Energy, and LONGi Institute of Future Technology, Lanzhou University, Lanzhou, 730000 China

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

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First published: 25 April 2025

Abstract

Room-temperature sodium-sulfur (RT Na-S) batteries are expected to become the next-generation energy storage system due to their ultrahigh theoretically energy density of 1274 Wh kg−1, abundant sulfur resource, and low cost. However, practical application is hindered by challenges of severe shuttle effect and sluggish S conversion kinetics. In this study, a series of nano-sized nickel-based chalcogenides are designed and fabricated as electrocatalysts for S cathode. The p orbitals originated from different anions show great effect on the partial-filled d orbital of the metal Ni site, which further regulates the electronic states of the catalytic site. Theoretical and experimental results confirm the excellent electrocatalytic performance of NiSe electrocatalyst with low reaction energy barriers, moderate adsorption capability, and strong catalytic conversion ability, consistent with Sabatier's principle. The optimized NiSe catalyst presents a high reversible capacity of 720.4 mAh g−1 with excellent durability over 200 cycles at 0.2 A g−1 retained a capacity of 401.4 mAh g−1 after 1000 cycles at 2 A g−1 in RT Na-S batteries. This work presents the balancing of adsorption and catalytic conversion toward polysulfides via the modulation of d/p orbitals of active sites.

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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