水热-热分解法制备纳米结构花状NiO及其电化学性能

Preparation and Electrochemical Properties of Nanostructured Flower-like NiO by Hydrothermal-decomposition

以十二烷基硫酸钠（SDS）为表面活性剂水热合成制备了Ni（OH）2前驱体，经过热处理得到NiO.通过TGA、XRD、SEM对前驱体及产物的物相和结构进行表征，结果表明：300℃热处理后得到了具有纳米结构花状的NiO。采用循环伏安、恒流充放电的方法研究了NiO单电极电化学行为。结果表明：热分解制备的NiO具有典型的赝电容特性；300℃热处理所得NiO电极在6mol·L^-1KOH溶液中和0～0．4V（vs．SCE）电位范围内，具有较好的电化学性能，单电极比电容可达826．

NiO was obtained by thermal decomposition of Ni （OH）2 precursor that synthesized via hydrothermal process using SDS as surfaetant. The structure and morphology of the precursors and products were characterized by TGA, XRD and SEM. The results showed that the morphology of NiO was nanostructured flower-like at 300℃. The capacitance performance of NiO single electrode was researched by cyclic voltammetry and galvanostaitc charge/discharge methods. The results indicated that the NiO electrode had typical pseudoeapaeitive behavior. The NiO single electrode, which was synthesized by hydrothermal-decomposition, had good electrochemical property and the specific capacitance was up to 826. 4 F · g^-1 in 6M KOH electrolyte concentration with 0 to 0.4V potential （vs. SCE）.