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- Title
Co<sub>3</sub>O<sub>4</sub> Hollow Nanoparticles and Co Organic Complexes Highly Dispersed on N-Doped Graphene: An Efficient Cathode Catalyst for Li-O<sub>2</sub> Batteries.
- Authors
Zhang, Zhang; Chen, Yanan; Bao, Jie; Xie, Zhaojun; Wei, Jinping; Zhou, Zhen
- Abstract
Rechargeable Li-O2 batteries are promising candidates for electric vehicles due to their high energy density. However, the current development of Li-O2 batteries demands highly efficient air cathode catalysts for high capacity, good rate capability, and long cycle life. In this work, a hydrothermal-calcination method is presented to prepare a composite of Co3O4 hollow nanoparticles and Co organic complexes highly dispersed on N-doped graphene (Co-NG), which acts as a bifunctional air cathode catalyst to optimize the electrochemical performances of Li-O2 batteries. Co-NG exhibits an outstanding initial discharge capacity up to 19 133 mAh g−1 at a current density of 200 mA g−1. In addition, the batteries could sustain 71 cycles at a cutoff capacity of 1000 mAh g−1 with low overpotentials at the current density of 200 mA g−1. Co-NG composites are attractive as air cathode catalysts for rechargeable Li-O2 batteries.
- Subjects
COBALT oxides; METAL nanoparticles; GRAPHENE; CALCINATION (Heat treatment); SUPEROXIDES
- Publication
Particle & Particle Systems Characterization, 2015, Vol 32, Issue 6, p680
- ISSN
0934-0866
- Publication type
Article
- DOI
10.1002/ppsc.201400242