Constructing robust and fast desolvation interfacial layer with halloysite nanotubes/polydopamine for dendrite-free and durable zinc metal anode

作者：Yanchen Sun, Kai Liu, Yingjie Zhang, Sijia Zhao, Junjie Sun, Shuai Wang, Zhenni Huang, Tauseef Shahid, Zhu‐Jun Yao, Yefeng Yang · 发表于：Journal of Energy Storage · 年份：2025 · DOI：10.1016/j.est.2025.117237 · 被引用次数：9 · 研究领域：Advanced battery technologies research、Advanced Battery Materials and Technologies、Electrochemical Analysis and Applications

Metallic zinc is recognized as a promising anode candidate for aqueous zinc-based batteries (AZBs), however, issues such as dendrite formation and parasitic side reactions severely deteriorate its reversibility and practical lifespan. In this study, we construct a robust and fast desolvation interfacial layer composed of halloysite nanotubes and polydopamine (HNTs/PDA) on the surface of Zn foil to achieve dendrite-free and durable Zn anodes. The amino and hydroxyl groups in PDA promote the desolvation process of Zn(H 2 O) 6 2+ , resulting in a uniform dispersion of Zn 2+ flux, while the negatively charged siloxane groups on the outer surface of HNTs function as an ion sieve, homogenizing the Zn 2+ flux distribution and alleviating concentration polarization. Additionally, the positively charged aluminum hydroxyl groups and hollow tubular structure of HNTs effectively trap SO 4 2− and OH − through electrostatic adsorption, thereby suppressing side reactions. Consequently, the symmetric cell based on HNTs/PDA@Zn can be stably cycled for over 2000 h at 1 mA cm −2 with a capacity of 1 mAh cm −2 , demonstrating excellent cycling performance. When paired with a V 2 O 5 cathode, the HNTs/PDA@Zn||V 2 O 5 full cell delivers high discharge capacity and long cycle stability without significant performance deterioration over 1800 cycles at 5.0 A g −1 .