Volume 5, Issue 9 2100339
Research Article

Improving Na/Na3Zr2Si2PO12 Interface via SnOx/Sn Film for High-Performance Solid-State Sodium Metal Batteries

Jiayi Yang

Jiayi Yang

School of Materials Science and Engineering, Huazhong University of Science and Technology, Wuhan, Hubei, 430074 China

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Henghui Xu

Corresponding Author

Henghui Xu

School of Materials Science and Engineering, Huazhong University of Science and Technology, Wuhan, Hubei, 430074 China

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

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Jingyi Wu

Jingyi Wu

School of Materials Science and Engineering, Huazhong University of Science and Technology, Wuhan, Hubei, 430074 China

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Zhonghui Gao

Zhonghui Gao

Institute of New Energy for Vehicles, School of Materials Science and Engineering, Tongji University, Shanghai, 201804 China

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Fei Hu

Fei Hu

School of Materials Science and Engineering, Huazhong University of Science and Technology, Wuhan, Hubei, 430074 China

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Ying Wei

Ying Wei

School of Materials Science and Engineering, Huazhong University of Science and Technology, Wuhan, Hubei, 430074 China

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Yuyu Li

Yuyu Li

Key Laboratory of Optoelectronic Chemical Materials and Devices, School of Chemical and Environmental Engineering, Jianghan University, Wuhan, Hubei, 430074 China

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Dezhong Liu

Dezhong Liu

School of Materials Science and Engineering, Huazhong University of Science and Technology, Wuhan, Hubei, 430074 China

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Zhen Li

Corresponding Author

Zhen Li

School of Materials Science and Engineering, Huazhong University of Science and Technology, Wuhan, Hubei, 430074 China

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

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Yunhui Huang

Corresponding Author

Yunhui Huang

School of Materials Science and Engineering, Huazhong University of Science and Technology, Wuhan, Hubei, 430074 China

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

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First published: 01 August 2021
Citations: 38

Abstract

Sodium (Na) metal batteries have attracted much attention due to their rich resources, low cost, and high energy density. As a promising solid electrolyte, Na3Zr2Si2PO12 (NZSP) is expected to be used in solid-state Na metal batteries addressing the safety concerns. However, due to the poor contact between NZSP and the Na metal, the interfacial resistance is too large to gain proper performance for practical solid-state batteries (SSBs) application. Here, a SnOx/Sn film is successfully introduced to improve the interface between Na and NZSP for enhancing the electrochemical performance of SSBs. As a result, the Na/NZSP interfacial resistance is dramatically reduced from 581 to 3 Ω cm2. The modified Na||Na symmetric cell keeps cycling over 1500 h with an overpotential of 40 mV at 0.1 mA cm–2 at room temperature. Even at current densities of 0.3 and 0.5 mA cm–2, the cell still maintains an excellent cyclability. When coupled with NaTi2(PO4)3 and a Na3V2(PO4)3 cathode, the full-cell demonstrates a good performance at 0.2 C and 1 C, respectively. The present work provides an effective way to solve the interface issue of SSBs.

Conflict of Interest

The authors declare no conflict of interest.

Data Availability Statement

Research data are not shared.

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