Synergetic Structural Optimizations of Zinc Anodes and Electrolytes to Enable Zinc–Iodine Batteries with Excellent Low-Temperature Performances

作者：Qingqing Ren, Xinyue Tang, Gang Sun, Yaqing Guo, Yixing Li, Xu‐Lei Sui, Zhen‐Bo Wang · 发表于：ACS Nano · 年份：2025 · DOI：10.1021/acsnano.5c07752 · 被引用次数：13 · 研究领域：Advanced battery technologies research、Electrocatalysts for Energy Conversion、Perovskite Materials and Applications

Challenges like zinc dendrite growth, hydrogen evolution, and electrolyte freezing hinder the development of aqueous Zn-based batteries. To address these issues, we implemented synergetic structural optimizations. A stress-mediated (002)-textured Zn anode was fabricated and characterized via cross-sectional electron channeling contrast. Additionally, ethylene glycol was used to further promote planar Zn electrodeposition via regulation of its kinetics, with Zn crystal nucleation observed. Interestingly, low concentrations of I – ions were incorporated into the ZnSO 4 electrolyte and formed a hydrophobic inner Helmholtz plane on the Zn anode, effectively suppressing hydrogen evolution. As a result, the modified Zn symmetric battery achieved an impressive 7710 h of stable cycling at 5 mA cm –2 /1 mAh cm –2 and 1800 h at 12 mA cm –2 /6 mAh cm –2 . Furthermore, the modified Zn–I 2 battery demonstrated an outstanding low-temperature performance, delivering a discharge capacity of 89 mAh g –1 at 0.2 A g –1 after 2300 cycles at −30 °C.