期刊
NANO LETTERS
卷 16, 期 3, 页码 1794-1802出版社
AMER CHEMICAL SOC
DOI: 10.1021/acs.nanolett.5b04788
关键词
Nickel-zinc batteries; zinc-air batteries; hybrid batteries; high power; high energy
类别
资金
- Natural Sciences and Engineering Research Council of Canada (NSERC)
- University of Waterloo
Herein, a proof-of-concept of novel hybrid rechargeable battery based on electrochemical reactions of both nickel-zinc and zinc-air batteries is demonstrated using NiO/Ni(OH)(2) nanoflakes self-assembled into mesoporous spheres as the active electrode material. The hybrid battery operates on two sets of fundamentally different battery reactions combined at the cell level, unlike in other hybrid systems where batteries of different reactions are simply connected through an external circuitry. As a result of combining nickel-zinc and zinc-air reactions, the hybrid battery demonstrates both remarkably high power density (volumetric, 14 000 W L-1; gravimetric, 2700 W kg(-1)) and energy density of 980 W h kg(-1), significantly outperforming the performances of a conventional zinc-air battery. Furthermore, the hybrid battery demonstrates excellent charge rate capability up to 10 times faster than the rate of discharge without any capacity and voltage degradations, which makes it highly suited for large-scale applications such as electric vehicle propulsion and smart-grid energy storage.
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