Department of Energy Systems Research, Ajou University, Suwon, 443-749, Korea.
Sci Rep. 2013;3:2325. doi: 10.1038/srep02325.
Template-driven strategy has been widely used to synthesize inorganic nano/micro materials. Here, we used a bottom-up controlled synthesis route to develop a powerful solution-based method of fabricating three-dimensional (3D), hierarchical, porous-Co3O4 superstructures that exhibit the morphology of flower-like microspheres (hereafter, RT-Co3O4). The gram-scale RT-Co3O4 was facilely prepared using one-pot synthesis with bacterial templating at room temperature. Large-surface-area RT-Co3O4 also has a noticeable pseudocapacitive performance because of its high mass loading per area (~10 mg cm(-2)), indicating a high capacitance of 214 F g(-1) (2.04 F cm(-2)) at 2 A g(-1) (19.02 mA cm(-2)), a Coulombic efficiency averaging over 95%, and an excellent cycling stability that shows a capacitance retention of about 95% after 4,000 cycles.
模板驱动策略已被广泛用于合成无机纳米/微米材料。在这里，我们使用自下而上的控制合成路线，开发了一种强大的基于溶液的方法，用于制造具有花状微球形态的三维（3D）、分级多孔-Co3O4 超结构（以下简称 RT-Co3O4）。使用细菌模板在室温下一锅合成，可方便地制备出 RT-Co3O4 的克级规模产物。由于其高面载量（~10mg cm(-2)），大面积 RT-Co3O4 还具有显著的赝电容性能，在 2A g(-1)（19.02mA cm(-2)）下的电容为 214F g(-1)（2.04F cm(-2)），库仑效率平均超过 95%，循环稳定性极好，经过 4000 次循环后，电容保持率约为 95%。
