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通过水热法在150℃保温6h和9h制备了纳米带状氧化锰与碳复合材料(MnO(OH)/C)。表征和分析结果表明,MnO(OH)为纳米带状结构,直径为4~8nm,长度为几微米,碳为近似球形结构,直径约为50nm。以1.0mol/L的Na_2SO_4溶液为电解液,以所制备的MnO(OH)/C复合材料为工作电极,对其超级电容器循环伏安和恒流充放电性能进行了分析。结果表明,在0.2A/g的电流密度下,电极材料的比电容可达到116.3F/g,当电流密度增加至2.0A/g时,其比电容保持率可达82.6%。
Nanostructured manganese oxide and carbon composite (MnO (OH) / C) were prepared by hydrothermal method at 150 ℃ for 6h and 9h. Characterization and analytical results show that MnO (OH) is a nanobelt with a diameter of 4 ~ 8nm, a length of a few microns, carbon is approximately spherical structure, a diameter of about 50nm. Using 1.0mol / L Na_2SO_4 solution as electrolyte and the prepared MnO (OH) / C composite as working electrode, the cyclic voltammetry and constant current charge / discharge performance of supercapacitor were analyzed. The results show that the specific capacitance of the electrode material can reach 116.3F / g at a current density of 0.2A / g, and the specific capacitance of 82.6% can be achieved when the current density is increased to 2.0A / g.