Open Access Nano Express

Catalytic properties of Co3O4 nanoparticles for rechargeable Li/air batteries

Kwan Su Kim and Yong Joon Park*

Author Affiliations

Department of Advanced Materials Engineering, Kyonggi University, San 94-6, Yiui-dong, Yeongtong-gu, Suwon, Gyeonggi-do, 443-760, Republic of Korea

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Nanoscale Research Letters 2012, 7:47  doi:10.1186/1556-276X-7-47

Published: 5 January 2012

Abstract

Three types of Co3O4 nanoparticles are synthesized and characterized as a catalyst for the air electrode of a Li/air battery. The shape and size of the nanoparticles are observed using scanning electron microscopy and transmission electron microscopy analyses. The formation of the Co3O4 phase is confirmed by X-ray diffraction. The electrochemical property of the air electrodes containing Co3O4 nanoparticles is significantly associated with the shape and size of the nanoparticles. It appears that the capacity of electrodes containing villiform-type Co3O4 nanoparticles is superior to that of electrodes containing cube- and flower-type Co3O4 nanoparticles. This is probably due to the sufficient pore spaces of the villiform-type Co3O4 nanoparticles.

Keywords:
composites; nanostructures; chemical synthesis; electrochemical properties.