Synthesis of precursor-derived 1D to 2D Co3O4 nanostructures and their pseudo capacitance behaviour

摘要: Co3O4 nanochains and nanosheets consisting of small single crystalline particles have been obtained by controlling the morphology precursor Co(CO3)0.5(OH)·0.11H2O via an environmentally friendly hydrothermal method without any addition CO32− sources. The were constructed crystal grains connected one to form a necklace structure. size in adjusted through calcination nanobelts at 350–600 °C. Porous irregular nanoparticles created when precursors calcined 300 700 °C, respectively. Through changing volume ratios ammonia ethylene glycol solution, was from one-dimensional (1D) mixture finally 2D nanosheets. After calcination, corresponding with porous nanostructure obtained. Importantly, evaluated as electrode materials for supercapacitors, as-prepared exhibit superior supercapacitive performance capacitance high 800 F g−1 which is higher than that most previous reports, possibly due their special short range order long disorder structures demonstrated high-resolution transmission electron microscopy. In contrast, low compared nanochains. Because improved performance, will be utilizable supercapacitors.