Self-Assembled NiO/Ni(OH)2 Nanoflakes as Active Material for High-Power and High-Energy Hybrid Rechargeable Battery

详细信息    查看全文

• 作者：Dong Un Lee ; Jing Fu ; Moon Gyu Park ; Hao Liu ; Ali Ghorbani Kashkooli ; Zhongwei Chen
• 刊名：Nano Letters
• 出版年：2016
• 出版时间：March 9, 2016
• 年：2016
• 卷：16
• 期：3
• 页码：1794-1802
• 全文大小：617K
• ISSN：1530-6992

文摘

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.