1. Highly reversible Zn anodes enabled by in-situ construction of zincophilic zinc polyacrylate interphase for aqueous Zn-ion batteries.
- Author
-
Song, Yue-Xian, Chen, Xiao-Jiang, Wang, Jiao, Wang, Kai, Zhang, Yao-Hui, Zhang, Li-Xin, Zhong, Xiao-Bin, Liang, Jun-Fei, and Wen, Rui
- Abstract
In-situ construction of zinc polyacrylate (ZPAA) interphase on Zn anode tunes the interfacial electric field and permits rapid Zn-ion transport for facilitating uniform Zn deposition due to superior zincophilicity and inherent ion-diffusion channel, thus achieving an excellent Zn plating/stripping cycling stability. [Display omitted] The irreversibility and low utilization of Zn anode stemming from the corrosion and dendrite growth have largely limited the commercialization of aqueous zinc batteries. Here, a carbonyl-rich polymer interphase of zinc polyacrylate (ZPAA) is spontaneously in-situ constructed on Zn anode to address the above-mentioned dilemmas. The ZPAA interlayer enables fast transport kinetics of Zn2+ and tailors the interfacial electric field for realizing the uniform Zn deposition due to superior zincophilicity, high Zn2+ transference number and inherent ion-diffusion channel. Importantly, acting as a buffer interphase with strong adhesion and isolation of electrolytes, this functional layer effectively protects the Zn electrode against the water-induced erosion and passivation. Remarkably, the ZPAA@Zn electrode realizes an enhanced Coulombic efficiency of 99.71 % within 2200 cycles, delivers an ultra-long cycling stability over 7660 h (>319 days, 1 mA cm−2) and 2460 h (5 mA cm−2) with lower voltage hysteresis. Also, the ZPAA@Zn/MnO 2 full cell maintains a high capacity of 114 mAh/g after 2000 cycles, much better that of untreated Zn/MnO 2 cell (25 mAh/g). This concept of in-situ fabricating ion-sieve-like polymer interphase provides a facile approach to stabilize Zn anode and further paves a way for high-performance aqueous batteries. [ABSTRACT FROM AUTHOR]
- Published
- 2025
- Full Text
- View/download PDF