Abstract
In this paper, a highly-active cobalt oxide (CoO) nanospheres catalyst has been synthesized by DC arc discharge plasma method and used as air electrode for lithium oxygen battery. Through scanning electron microscopy (SEM) observation, the particle size of the cobalt oxide (CoO) catalyst can be controlled between 40~60 nm and dispersed uniformly into the active material. And then the cobalt oxide (CoO) nanospheres mixed with La2O3 and Pt/C makes up the ternary catalyst of the air electrode for lithium oxygen battery. The electrochemical test results show that the oxygen reduction reaction peaks are more obvious, and the increase of charge transfer rate has no significant influence on the diffusion mass transfer rate. The specific capacity and energy density of air electrode with Co-La-Pt ternary catalyst can respectively reach 3250.2 mAh g−1 and 8574.2 Wh kg−1 at 0.025 mA cm−2. After 62 cycles, 38.3% of the initial capacity can still be maintained.
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