Volume 135, Issue 2 e202215110
Zuschrift

Empowering Zn Electrode Current Capability Along Interfacial Stability by Optimizing Intrinsic Safe Organic Electrolytes

Farva Ilyas

Farva Ilyas

School of Chemistry and Chemical Engineering, Shanghai Jiao Tong University, Shanghai, 200240 China

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Jiahang Chen

Jiahang Chen

School of Chemistry and Chemical Engineering, Shanghai Jiao Tong University, Shanghai, 200240 China

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Yang Zhang

Yang Zhang

School of Chemistry and Chemical Engineering, Shanghai Jiao Tong University, Shanghai, 200240 China

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Huichao Lu

Huichao Lu

School of Chemistry and Chemical Engineering, Shanghai Jiao Tong University, Shanghai, 200240 China

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Yudai Huang

Yudai Huang

State Key Laboratory of Chemistry and Utilization of Carbon-Based Energy Resources, College of Chemistry, Xinjiang University, Urumqi 830046 Xinjiang, China

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Huiyang Ma

Huiyang Ma

College of Chemistry, Zhengzhou University, Henan, 450001, Zhengzhou China

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Jiulin Wang

Corresponding Author

Jiulin Wang

School of Chemistry and Chemical Engineering, Shanghai Jiao Tong University, Shanghai, 200240 China

State Key Laboratory of Chemistry and Utilization of Carbon-Based Energy Resources, College of Chemistry, Xinjiang University, Urumqi 830046 Xinjiang, China

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First published: 12 November 2022

Abstract

Metallic Zn is one of the most promising anodes, but its practical application has been hindered by dendritic growth and serious interfacial reactions in conventional electrolytes. Herein, ionic liquids are adopted to prepare intrinsically safe electrolytes via combining with TEP or TMP solvents. With this synergy effect, the blends of TEP/TMP with an IL fraction of ≈25 wt% are found to be promising electrolytes, with ionic conductivities comparable to those of standard phosphate-based electrolytes while electrochemical stabilities are considerably improved; over 1000 h at 2.0 mA cm−2 and ≈350 h at 5.0 mA cm−2 with a large areal capacity of 10 mAh cm−2. The use of functionalized IL turns out to be a key factor in enhancing the Zn2+ transport due to the interaction of Zn2+ ions with IL-zincophilic sites resulting in reduced interfacial resistance between the electrodes and electrolyte upon cycling leading to spongy-like highly porous, homogeneous, and dendrite-free zinc as an anode material.

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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