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Engineering the interplanar spacing of ammonium vanadates as a high-performance aqueous zinc-ion battery cathode

Author:
Tang, Boya, Zhou, Jiang, Fang, Guozhao, Liu, Fei, Zhu, Chuyu, Wang, Chao, Pan, Anqiang, Liang, Shuquan
Source:
Journal of materials chemistry A 2019 v.7 no.3 pp. 940-945
ISSN:
2050-7496
Subject:
ammonium compounds, batteries, cathodes, diffusivity, electrochemistry, energy, energy density
Abstract:
We report the engineering of the interplanar spacing of ammonium vanadates to achieve the optimal electrochemical performance as cathodes for aqueous zinc-ion batteries (ZIBs) and provide insights into the origin of the enhanced electrochemical behaviors. The NH₄V₄O₁₀ compound, with the largest interplanar spacing (9.8 Å) and high diffusion coefficient, exhibits high energy density (374.3 W h kg⁻¹) and power density (9000 W kg⁻¹) as well as superior long-term cycling performance (a discharge capacity of 255.5 mA h g⁻¹ can be maintained after 1000 cycles at 10 A g⁻¹). With the merits of impressive energy density and long cycle life, the NH₄V₄O₁₀ might be a new promising cathode for aqueous ZIBs for grid energy storage applications. This work provides a direction for choosing or designing the ideal high-performance cathode for aqueous ZIBs and other advanced battery systems.
Agid:
6269831