氢氧化镍纳米片的制备及其超电容性质

Study on the Preparation and Its Supercapacitive Properties of Ni(OH)_2 Nanosheets

以乙醇为溶剂,氨水作为沉淀剂,制备出了氢氧化镍纳米片.用X射线衍射仪和场发射电子显微镜(FESEM)表征了产物的形貌和结构,结果表明所得产物为厚约30 nm直径200～400 nm的纳米薄片.将所制备的氢氧化镍纳米片制成电极,用循环伏安、恒电流充放电测试和交流阻抗等方法测试表明,氢氧化镍纳米片具有良好的超电容性质,其单电极比容量最高达到1 338 F.g-1.

The Ni（OH）2 nanosheets were prepared with ethanol as the solvent and ammonia as the precipitant. The structure and morphology of Ni （OH） 2 nanosheets were characterized using X - ray diffraction （XRD） and field emission scanning electron microscopy （ FESEM ）. The product obtained was characterized as β- Ni（OH） 2 nanosheets with 30 nm in thickness and 200 -400 nm in width. The supercapacitor properties were studied by cyclic vohammetry（CV） ,constant current charge/discharge and electrochemical impedance spectroscopy techniques. The results show that the obtained β - Ni （OH）2 nanosheets have excellent supercapacitor -1 properties. The specific capacitance as single electrode is up to 1 338 F · g^-1.