Water-shielding electric double layer and stable interphase engineering for durable aqueous zinc-ion batteries

Zhongyou Peng, Shulong Li, Ling Tang, Jinyang Zheng, Licheng Tan () and Yiwang Chen ()
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Zhongyou Peng: Nanchang University
Shulong Li: Nanchang University
Ling Tang: Nanchang University
Jinyang Zheng: Nanchang University
Licheng Tan: Nanchang University
Yiwang Chen: Nanchang University

Nature Communications, 2025, vol. 16, issue 1, 1-13

Abstract: Abstract Aqueous zinc-ion batteries persistently encounter interface issues stemming from the water-rich electrical double layer and unstable solid-electrolyte interphase, drastically compromising reversibility and cyclability. Here we show that trace amounts of nonionic amphiphilic polysorbate additives promote the formation of water-shielding electric double layer and stabilize solid-electrolyte interphase for practical zinc-ion batteries. We demonstrate that polysorbate molecules can produce preferential chemisorption and directional arrangement on the Zn anode, spontaneously forming water-shielding layer to suppress the water-related side reactions. Simultaneously, polysorbate molecules can assist the construction of organic-inorganic hybrid interphase, which effectively regulates the uniform distribution of electric field and guides preferential orientation Zn deposition to achieve ordered plating/stripping with high Zn utilization. Consequently, the polysorbate-containing electrolyte enables a long cycle life of 8060 h at 1 mA cm−2, 1 mAh cm−2 for Zn||Zn cell, and highly reversible Zn plating/stripping in Zn||Cu cell over 3900 cycles. The full cells paired with V2O5/rGO and MnO2 deliver the improved capacity and sustained stability.

Date: 2025
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DOI: 10.1038/s41467-025-59830-y

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