Figure 11.

a The first charge–discharge curves of anisotropic Co3O4 porous nanocapsules at a current density of 110 mA g−1; b cycling performance of Co3O4 porous nanocapsules at a current density of 130 mA g−1

Liu and Xue Nanoscale Research Letters 2010 5:1525-1534   doi:10.1007/s11671-010-9728-5