水溶液
锌
材料科学
接口(物质)
债券
结晶学
化学
化学工程
纳米技术
冶金
业务
有机化学
工程类
吉布斯等温线
财务
作者
Shuai Wang,Haoran Wang,Jiguo Tu,Lei Huang,Shenzhen Deng,Bingang Xu,Lei Wei
出处
期刊:ACS Nano
[American Chemical Society]
日期:2025-01-21
标识
DOI:10.1021/acsnano.4c13735
摘要
Hydrogen evolution reaction and Zn dendrite growth, originating from high water activity and the adverse competition between the electrochemical kinetics and mass transfer, are the main constraints for the commercial applications of the aqueous zinc-based batteries. Herein, a weak H-bond interface with a suspension electrolyte is developed by adding TiO2 nanoparticles into the electrolytes. Owing to the strong polarity of Ti-O bonds in TiO2, abundant hydroxyl functional groups are formed between the TiO2[110] active surface and aqueous environment, which can produce a weak H-bond interface by disrupting the initial H-bond networks between the water molecules, thereby accelerating the mass transfer of Zn2+ and reducing the water activity. In consequence, the Zn||Zn symmetrical cells display reversible Zn plating/stripping behaviors with a high Coulombic efficiency of 99.7% over 700 cycles. Moreover, the TiO2-based suspension strategy is also applicable to other zinc salt systems and exhibits fast plating/stripping behaviors. The suspension electrolyte enables long-term full cells, including Zn||PANI hybrid capacitors and Zn||ZnVO full batteries.
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