Promoting Proton Migration Kinetics by Ni <sup>2+</sup> Regulating Enables Improved Aqueous Zn?MnO <sub>2</sub> Batteries
نویسندگان
چکیده
The energy storage behaviors of MnO2 for aqueous Zn-MnO2 batteries mainly depend on the Zn2+/H+ intercalation but are limited by poor ion/electron migration dynamics and stability. Herein, a strategy is proposed that promoting proton kinetics ameliorates H+ activity introducing Ni2+ into ?-MnO2 (Ni-MnO2). can lower diffusion barrier selectively induce ion intercalation, thereby alleviating electrostatic interaction with lattice. Moreover, enables adjacent [MnO6] octahedrons to have better electron conductivity. Ni-MnO2 exhibits superior rate performance (nearly four times specific capacity compared MnO2) ultra-long-cycle stability (100% retention after 11 000 cycles at 3.0 A g?1). calculation indicates allows migrate rapidly along one-dimensional tunnel due reduction activation caused regulating, thus achieving excellent reaction kinetics. This work brings great potential development high-performance batteries.
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ژورنال
عنوان ژورنال: Energy & environmental materials
سال: 2022
ISSN: ['2575-0348', '2575-0356']
DOI: https://doi.org/10.1002/eem2.12340