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Published on: June 9, 2023
Controllable amorphization and morphology engineering on mixed-valence MOFs for ultra-fast and high-stability
Junjie Yu1, Yan Wu1, Tianlang Peng1
1Key Laboratory of Novel Materials for Sensor of Zhejiang Province and New Energy Materials Research Center, College of Materials and Environmental Engineering, Hangzhou Dianzi University, Hangzhou, 310018, P. R. China. xshu@hdu.edu.cn.
Abstract:
Coulombic efficiency (CE) and rate capability are crucial parameters for advanced secondary batteries. Herein, for the first time, we report controllable amorphization and morphology engineering on mixed-valence Fe(II,III)-MOFs from the crystalline to amorphous state and micro-clustered to hollow nano-spherical geometry through valence manipulation by a dissolved oxygen-mediated pathway. The disordered structure and the hollow nanostructure can endow the MOFs with the highest initial CE (>80%) to date for MOF electrodes, and ultrafast and super-stable near-pseudocapacitance lithium storage. These findings can provide new ideas for the engineering of MOF systems for application in LIBs.
