Liu Dongbo, Li Xiao-Min, Jia Junchao, Long Xingyu, Yan Junpeng, Xiao Mengyang, Ibragimov Aziz Bakhtiyarovich, Gao Junkuo
China-Uzbekistan Joint Laboratory on Advanced Porous Materials, School of Materials Science and Engineering, Zhejiang Sci-Tech University Hangzhou 310018 P. R. China
Institute of General and Inorganic Chemistry, Uzbekistan Academy of Sciences Tashkent 100170 Uzbekistan.
Chem Sci. 2025 May 26;16(25):11581-11586. doi: 10.1039/d5sc01923k. eCollection 2025 Jun 25.
The development of aqueous electrolytes exhibiting high ionic conductivities through solvent-free methods is of great significance for the progress of aqueous battery technology. This study presents a high-performance ionic conductor engineered through a synergistic chaotropic effect and defective structure using a solvent-free approach. The combination of localized acidification at vacancy sites and doping chaotropic LiI enhances ionic diffusion in D-UiO-66-LiI. The generated cationic substructure promotes ion confinement effects within the D-UiO-66-LiI pores, establishing efficient conduction pathways. Furthermore, temperature-dependent analysis reveals that thermal energy increases ion movement and weakens the hydration of Li ions, not only increasing ion mobility but also maintaining the water networks through dynamic hydrogen bonding reconstruction. These coordinated effects enable D-UiO-66-LiI to achieve ultrahigh ionic conductivities across wide temperature and humidity ranges.
通过无溶剂方法开发具有高离子电导率的水性电解质对水性电池技术的进步具有重要意义。本研究提出了一种通过协同离液效应和缺陷结构，采用无溶剂方法设计的高性能离子导体。空位处的局部酸化与掺杂离液剂LiI的结合增强了D-UiO-66-LiI中的离子扩散。生成的阳离子亚结构促进了D-UiO-66-LiI孔内的离子限制效应，建立了有效的传导途径。此外，温度依赖性分析表明，热能增加了离子运动并削弱了锂离子的水合作用，不仅提高了离子迁移率，还通过动态氢键重建维持了水网络。这些协同效应使D-UiO-66-LiI在宽温度和湿度范围内实现超高离子电导率。
