Figure 4.

Discharge profiles of the air electrodes containing the CNT/Co3O4 composite for the initial three cycles. At a current density of (a) 0.2 mA·cm-2, (b) 0.4 mA·cm-2, and (c) 0.6 mA·cm-2. (d) Cyclic performance of the electrodes (current density, 0.4 mA·cm-2).

Yoon and Park Nanoscale Research Letters 2012 7:28   doi:10.1186/1556-276X-7-28
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