Co3O4 Hollow Nanoparticles and Co Organic Complexes Highly Dispersed on N‐Doped Graphene: An Efficient Cathode Catalyst for Li‐O2 Batteries. (29th January 2015)

• Record Type: Journal Article
• Authors: Zhang, Zhang; Chen, Yanan; Bao, Jie; Xie, Zhaojun; Wei, Jinping; Zhou, Zhen
• Is Part Of: Particle and particle systems characterization. Volume 32:Number 6(2015:Jun.)
• Page Start: 680
• Page End: 685
• Publication Date: 2015-01-29
• Subjects: Particles -- Periodicals; 620.43
• DOI: 10.1002/ppsc.201400242
• Languages: English
• ISSNs: 0934-0866

Abstract

<abstract abstract-type="main" xml:lang="en"> <title> <x xml:space="preserve">Abstract</x> </title> <p>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.</p> </abstract>