Hierarchical Co 3 O 4 porous nanowires (NWs) have been synthesized using a hydrothermal method followed by calcination. When employed as a cathode catalyst in non-aqueous Li-oxygen batteries, the Co 3 O 4 NWs effectively improve both the round-trip efficiency and cycling stability, which can be attributed to the high catalytic activities of Co 3 O 4 NWs for the oxygen reduction reaction and the oxygen evolution reaction during discharge and charge processes, respectively.
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Liu et al. (2014) studied this question.
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