人工晶体学报2013，Vol.42Issue(4)：625-629,5.
原料配比对水热法合成纳米MnO2晶型及电化学性能的影响
Effect of Raw Material Ratio on the Crystal Structure and Electrochemical Performance of Nano-MnO2 Synthesized by Hydrothermal Method
摘要
Abstract
Manganese oxides with different structures and morphologies were synthesized by hydrothermally treating KMnO4 and MnSO4 with varying molar ratio.As the molar ratio of KMnO4 and MnS0O is 6:1, the urchin-like δ-MnO2 superstructures with the diameter of 0.5-1 μm were prepared, which consist of agglomerate petal-shaped thin nanosheet.By adjusting the molar ratio of KMnO4 and MnSO4 to 2:3, the uniform α-MnO2 nanowires were fabricated with the diameter of 30 to 50 nm and the length up to 1 μn.With a decrease molar ratio of 1:3, the short rod-like β-MnO2 were obtained with the diameter of 500 nm and the length ranging from 2 to 4 μm.The electrochemical properties of obtained MnO2 samples as supercapacitor electrode materials were examined by cyclic voltammetry and galvanostatic charge-discharge in a three electrode system, the results indicated that spherical urchin-like δ-MnO2 possessed excellent supercapacitive performance.The specific capacitance of δ-MnO2 was about 162 F/g at a constant current of 1 A/g, which was much higher than the specific capacitance of α-MnO2 nanowires (62 F/g) and β-MnO2 nanorods (8 F/g).关键词
氧化锰/超级电容器/晶体结构/原料配比Key words
manganese dioxide/ supercapacitor/ crystal structure/ molar ratio of raw material分类
化学化工引用本文复制引用
阴育新,侯峰,杨春,周富强..原料配比对水热法合成纳米MnO2晶型及电化学性能的影响[J].人工晶体学报,2013,42(4):625-629,5.基金项目
国家自然科学基金(51072130) （51072130）
