Polarity-Matched Organic-Inorganic Interphase Directs Planar Zinc Deposition toward Highly Reversible Zn Anodes
Hang Lei1, Xincheng Zhou1, Tuo Xiao2
1Hubei Provincial Collaborative, Innovation Center for New Energy Microgrid, College of Electrical Engineering and New Energy, China Three Gorges University, Yichang 443002, China.
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Artificial organic-inorganic interphases offer a promising route to suppress dendrite growth and parasitic reactions in aqueous Zn-ion batteries, yet maintain interfacial integrity and control Zn crystallographic deposition. Here, we develop a polarity-matched Nafion-Zn(Ac)2 (NFCZn@Zn) interphase that self-assembles on Zn anodes. The acetate-rich Zn(Ac)2 sublayer provides strong Zn2+ binding and robust interaction with Nafion, preventing electrolyte-induced delamination. The hybrid interphase promotes planar zinc deposition while mitigating corrosion and byproduct formation. As a result, NFCZn@Zn symmetric cells achieve over 3000 h of stable cycling at 5 mA cm-2, withstand harsh conditions of 10 mA cm-2 and 10 mAh cm-2, and deliver high Coulombic efficiency. In full cells paired with VO2 cathodes, NFCZn@Zn enhances rate performance, reduces self-discharge, and improves long-term capacity retention compared with bare Zn anodes. This work provides a simple and scalable strategy to direct Zn2+ planar (002) deposition, enabling highly reversible and durable Zn-metal anodes.
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