Volume 9, Issue 7 2401930
Research Article

Fabrication of a Mechanically Robust Solid-Electrolyte Interphase on Sodium-Metal Anodes by Anion Modulation for Ambient Sodium-Air Batteries

Xiaofeng Lei

Xiaofeng Lei

School of Materials Science and Engineering, Tianjin University of Technology, Tianjin, 300384 China

School of Materials Science and Engineering, Linyi University, Linyi, 276000 China

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Menglin He

Menglin He

School of Materials Science and Engineering, Tianjin University of Technology, Tianjin, 300384 China

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Pingli Wu

Corresponding Author

Pingli Wu

Key Laboratory of Optoelectronic Chemical Materials and Devices (Ministry of Education), School of Optoelectronic Materials & Technology, Jianghan University, Wuhan, 430056 China

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

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Chao Ma

Chao Ma

School of Materials Science and Engineering, Tianjin University of Technology, Tianjin, 300384 China

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Xu Liu

Xu Liu

School of Materials Science and Engineering, Tianjin University of Technology, Tianjin, 300384 China

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Chongyan Yao

Chongyan Yao

School of Materials Science and Engineering, Tianjin University of Technology, Tianjin, 300384 China

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Wenfeng Cui

Wenfeng Cui

School of Materials Science and Engineering, Tianjin University of Technology, Tianjin, 300384 China

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Qingxu Zhang

Qingxu Zhang

School of Materials Science and Engineering, Tianjin University of Technology, Tianjin, 300384 China

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Caicai Li

Caicai Li

Key Laboratory of Optoelectronic Chemical Materials and Devices (Ministry of Education), School of Optoelectronic Materials & Technology, Jianghan University, Wuhan, 430056 China

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Huiqiao Li

Corresponding Author

Huiqiao Li

Key Laboratory of Optoelectronic Chemical Materials and Devices (Ministry of Education), School of Optoelectronic Materials & Technology, Jianghan University, Wuhan, 430056 China

State Key Laboratory of Materials Processing and Die & Mould Technology, School of Materials Science and Engineering, Huazhong University of Science and Technology (HUST), Wuhan, 430074 China

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

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Xizheng Liu

Corresponding Author

Xizheng Liu

School of Materials Science and Engineering, Tianjin University of Technology, Tianjin, 300384 China

Key Laboratory of Optoelectronic Chemical Materials and Devices (Ministry of Education), School of Optoelectronic Materials & Technology, Jianghan University, Wuhan, 430056 China

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

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First published: 30 April 2025

Abstract

The stabilization of metallic-Na anodes by the fabrication of a mechanically stable solid-electrolyte interphase (SEI) can enable the construction of stable Na-air batteries (NABs) that can be used as practicable energy-storage devices in ambient air. This study reports in situ fabrication of air-stable Na anodes protected by SEI films for stable NABs. The regulation of anions in the electrolyte generated hierarchically layered SEI on Na anodes; the sequential deposition of inorganic salts and organic components is modulated by controlling the competitive reduction of salt and solvent molecules on the Na surface. Metallic-Na anodes with hierarchical SEI comprising an outer salt-rich and inner organic-component-rich layer showed highly reversible stripping/plating. The high stability of the SEI layer in ambient air can be attributed to synergism between its hydrophilic inorganic and hydrophobic organic components. NABs with hierarchical-SEI-modified Na anodes showed stable cycling for >1900 h in ambient air. This study can guide the design of stable metallic anodes and facilitate the future development of diverse Na-based rechargeable 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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