Bilateral in-situ functionalization towards Ah-scale aqueous zinc metal batteries

Yexin Song, Manjing Chen, Ziyang Zhong, Zhexuan Liu (), Shuquan Liang and Guozhao Fang ()
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Yexin Song: Central South University
Manjing Chen: Central South University
Ziyang Zhong: Central South University
Zhexuan Liu: Central South University
Shuquan Liang: Central South University
Guozhao Fang: Central South University

Nature Communications, 2025, vol. 16, issue 1, 1-14

Abstract: Abstract Developing practical technical index of aqueous zinc metal batteries (ZMBs) is crucial to support safe large-scale energy storage. However, the realistic performance demonstration of ampere hour (Ah)-scale aqueous ZMBs under high mass loading and large areal capacity, which is the key to the industrial application of aqueous ZMBs, remains a critical challenge. In this paper, we propose a bilateral in-situ functionalization strategy in response to the issues that face high mass loading and large areal capacity of aqueous ZMBs. A gradient interface of Zn negative electrode was formed by directional adsorption and in-situ decomposition of organic sodium salt electrolyte additive. It avoids the influences from the fluctuation of electrolyte state and positive electrode dissolution, realizing uniform large-capacity plating/stripping in Ah-scale pouch cell. The positive electrode interface was also in-situ modified by electrolyte additive, which not only facilitated ion intercalation but also suppressed positive electrode dissolution through adsorption at the interface, thereby achieving high-loading stability. As a result, the cyclic stability in coin cell maintained more than 4000 cycles at 2 A g−1, underscoring the superior compared to its counterpart. More importantly, the Ah-scale pouch cell can last more than 680 cycles with an accumulated capacity of 319.6 Ah. This work offers a roadmap for designing practical Ah-scale ZMB pouch cells.

Date: 2025
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DOI: 10.1038/s41467-025-58153-2

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