【摘要】 通过常温下的液相-氧化还原法制备了层状δ-MnO2,用X射线衍射、热重分析、傅立叶红外光谱、扫描电子显微镜等对其物理性质进行了表征、并对其在1mol·L-1 LiOH和1mol·L-1 KOH电解液中的电化学性能进行了研究.实验结果表明,δ-MnO2在扫描速度为1mV·s-1的速度下,电容达到218F·g-1,甚至在扫描速率高达500mV·s-1时,仍表现出明显的氧化-还原性能,这表明该δ-MnO2具有大电流快速充放电的特性.更多还原

【Abstract】 A layer-structured manganese dioxide was synthesized by the liquid oxidation-reduction method at room temperature,and charactericsed by using X-ray diffraction,thermogravimetric analysis,Fourier transform infrared spectroscopy,scanning electron microscope.the electrochemical performance has studied in 1 mol· L-1 LiOH and 1mol· L-1 KOH electrolyte.The results shows that δ-MnO2 at a scan rate of 1 mV·s-1 the specific capacitance can achievement 218F·g-1.Even the scan rate at 500mV·s-1,still showed significant oxidationreduction performance, which indicates that the δ-MnO2 has a high-current fast charge and discharge characteristics.更多还原