Hierarchical NiCo2O4 nanosheets on carbon nanofiber films for high energy density and long-life Li–O2 batteries. Issue 28 (10th July 2017)

• Record Type: Journal Article
• Authors: Liu, Guoxue; Zhang, Lei; Wang, Suqing; Ding, Liang-Xin; Wang, Haihui
• Is Part Of: Journal of materials chemistry. Volume 5:Issue 28(2017)
• Page Start: 14530
• Page End: 14536
• Publication Date: 2017-07-10
• Subjects: Materials -- Research -- Periodicals; Chemistry, Analytic -- Periodicals; Environmental sciences -- Research -- Periodicals; 543.0284
• DOI: 10.1039/c7ta03703a
• Languages: English
• ISSNs: 2050-7488

Abstract

Abstract : An efficiently catalytic, lightweight, and binder-free cathode with hierarchical NiCo2 O4 nanosheets grown on carbon nanofibers is rationally designed and synthesized. Abstract : Designing oxygen cathodes with both high energy density and excellent cycling stability is a great challenge in the development of lithium–oxygen (Li–O2 ) batteries for energy storage systems. Herein, we design a novel structure of hierarchical NiCo2 O4 nanosheets on porous carbon nanofiber films (denoted as NiCo2 O4 @CNFs) as an oxygen cathode for lithium–oxygen batteries. The NiCo2 O4 @CNFs cathode delivers a high specific discharge capacity of 4179 mA h g −1, a high energy density of 2110 W h kg −1 and superior cycling stability over 350 cycles. The excellent electrochemical performance of the NiCo2 O4 @CNFs cathode can be attributed to the rational design and engineering of catalysts and porous conductive electrodes. These results indicate that the NiCo2 O4 @CNFs electrode is a promising candidate for high energy density and long-life Li–O2 batteries. Additionally, the rational design of the hierarchical catalyst constructed low-dimensional nanostructure and the lightweight porous carbon nanofiber electrode can be also used for other metal–oxygen batteries, such as zinc–oxygen (Zn–O2 ) batteries, aluminum–oxygen (Al–O2 ) batteries, and sodium–oxygen (Na–O2 ) batteries.