中文摘要：

采用低温水相沉淀法制备得到WO_3纳米片,通过X射线衍射法（XRD）、扫描电子显微镜（SEM）、热重分析法（TG）和红外光谱法（IR spectra）等分析方法对其结构、组成及形貌进行测试表征;并通过循环伏安测试（CV）及恒流充放电测试等电化学测试,研究了WO_3纳米片的电容性能.测试结果表明：本实验所制备的尺寸为300 nm×300 nm×40 nm的WO_3纳米片;其比电容值可达217 F·g~（-1）,并具有良好的循环寿命.

英文摘要：

We report a simple approach to synthesize nano-WO_3 by aqueous phase synthesis method at low temperature（ 90oC）. The structure,composition and morphology of the material were investigated by X-ray diffraction（ XRD）,scanning electron microscope（ SEM）,thermogravimetric analysis（ TG）,and infrared spectroscopy（ IR spectra）. The capacitance performance of the composites was explained by cyclic voltammetry（ CV）and charge-discharge tests. The results demonstrate that the sample is WO_3nano-sheet with a diameter of 300 nm and a thickness of about 40 nm. The specific capacitance of the material is up to 217 F·g~（-1）. Furthermore,the material has a desired circle lifetime.