Concentrated perchlorate-based electrolyte facilitates Zn anode-compatible in situ solid electrolyte interphase

IF 9.6 1区材料科学 Q1 MATERIALS SCIENCE, MULTIDISCIPLINARY

Rare Metals Pub Date : 2024-09-11 DOI:10.1007/s12598-024-02972-7

Yin-Sheng Li, Li-Shan Geng, Bo-Mian Zhang, Zi-He Wei, Hao Fan, Jing-Hao Li, Wen-Cong Feng, Liang Zhou

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Abstract

Zinc perchlorate (Zn(ClO₄)₂) electrolytes have demonstrated favorable low-temperature performance in aqueous zinc-ion batteries (AZIBs). However, the Zn anode encounters serious dendrite formation and parasitic reactions in zinc perchlorate electrolytes, which is caused by the fast corrosive kinetics at room temperature. Herein, a concentrated perchlorate-based electrolyte consisting of 4.0 M Zn(ClO₄)₂ and saturated NaClO₄ solution is developed to achieve dendrite-free and stable AZIBs at room temperature. The ClO₄⁻ participates in the primary solvation sheath of Zn²⁺, facilitating the in situ formation of Zn₅(OH)₈Cl₂·H₂O-rich solid electrolyte interphase (SEI) to suppress the corrosion effect of ClO₄⁻. The Zn anode protected by the SEI achieves stable Zn plating/stripping over 3000 h. Furthermore, the MnO₂||Zn full cells manifest a stable specific capacity of 200 mAh·g⁻¹ at 28 °C and 101 mAh·g⁻¹ at − 20 °C. This work introduces a promising approach for boosting the room-temperature performance of perchlorate-based electrolytes for AZIBs.

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以高氯酸盐为基础的浓缩电解质促进了与锌阳极相容的原位固体电解质相变

高氯酸锌（Zn(ClO4)2）电解质在水性锌离子电池（AZIB）中表现出良好的低温性能。然而，在高氯酸锌电解质中，锌阳极会遇到严重的枝晶形成和寄生反应，这是由室温下的快速腐蚀动力学引起的。本文开发了一种由 4.0 M Zn(ClO4)2 和饱和 NaClO4 溶液组成的高氯酸盐基浓缩电解液，以实现室温下无枝晶且稳定的 AZIB。ClO4- 参与了 Zn2+ 的主溶解鞘，促进了富含 Zn5(OH)8Cl2-H2O 的固态电解质间相（SEI）的原位形成，从而抑制了 ClO4- 的腐蚀效应。此外，MnO2||Zn全电池在28 °C时的比容量稳定在200 mAh-g-1，在-20 °C时的比容量稳定在101 mAh-g-1。这项研究为提高 AZIB 的高氯酸盐基电解质的室温性能提供了一种可行的方法。

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来源期刊

Rare Metals 工程技术-材料科学：综合

CiteScore

12.10

自引率

12.50%

发文量

2919

审稿时长

2.7 months

期刊介绍： Rare Metals is a monthly peer-reviewed journal published by the Nonferrous Metals Society of China. It serves as a platform for engineers and scientists to communicate and disseminate original research articles in the field of rare metals. The journal focuses on a wide range of topics including metallurgy, processing, and determination of rare metals. Additionally, it showcases the application of rare metals in advanced materials such as superconductors, semiconductors, composites, and ceramics.