Synthesis of NiO flower-like microspheres and their Electrochemical Performance

Abstract

We have successfully prepared β-Ni(OH)2 flower-like microspheres by the solvothermal method using 2-butanone and water mixture solvent for the first time. Then NiO flower-like microspheres were obtained by annealing the corresponding precursors at 300 °C. The flower-like microspheres were composed of many nanoplates. The thickness of nanoplates and the dimeter of flower-like microspheres were about 20 nm and 6 μm, respectively. For comparison, the sole β-Ni(OH)2 and NiO nanoplates were prepared in aqueous solution. Experimental results indicated that the as-synthesized NiO flower-like microspheres kept a relative high capacity retention during charge-discharge process, and their cyclic stability should be improved for potential application in lithium-ion batteries.