Authors
Jinxi Ye, Jingyu Xu, Shubing Zhen, Yuyun Xie, Jiayuan Luo, Xinhao Li, Yushi Wu, Haiqin Tang, Qian Qu, Tong Zhang
Published in
Small (Weinheim an der Bergstrasse, Germany). Pages e76425. Oct 21, 2026. Epub Oct 21, 2026.
Abstract
Rechargeable aqueous zinc ion batteries (AZIBs) are constrained by dendrite growth and water driven side reactions at the zinc anode, which erode reversibility and shorten cycle life. Here we show that a single silicotungstic acid (STA) etching step can simultaneously engineer the crystal orientation and interfacial chemistry of zinc anodes. The etching selectively reconstructs the Zn surface to expose Zn(101) facets while introducing a Keggin-type [SiW12O40]4--rich interphase. This dual engineered architecture accelerates interfacial charge transfer, raises the Zn2+ transference number from 0.38 to 0.62, and lowers the desolvation activation energy from 38.70 to 28.51 kJ mol-1, while the interphase suppresses hydrogen evolution and corrosion. As a result, the STA-Zn anode sustains uniform, dendrite free deposition with the favorable (101) texture retained during cycling. In symmetric cells, STA-Zn delivers a stable lifespan exceeding 3100 h, and the Zn||Ti cell maintains an average Coulombic efficiency (CE) of 97.95% ± 2.95% after 2000 cycles. A Zn||α-VO2 full cell further demonstrates increased rate capability, cycling stability, and anti-self-discharge performance. This work shows that one step etching can couple facet engineering with interphase design, providing a practical route toward highly reversible zinc metal anodes.
PMID:
42904542
Bibliographic data and abstract were imported from PubMed on 23 Oct 2026.
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