非晶MnO_2的制备及其电容性能  

Preparation and capacitive performance of amorphous MnO_2

作　　者：徐金玲[1] 陈辉[1] 徐孝文[1] 

机构地区：[1]苏州科技学院化学与生物工程学院,江苏苏州215009

出　　处：《苏州科技学院学报（自然科学版）》2012年第3期57-60,共4页Journal of Suzhou University of Science and Technology （Natural Science Edition）

基　　金：住房与城乡建设部科技项目(2010-K6-5)

摘　　要：以KMnO4、H2O2和（NH4）6Mo7O24.4H2O为原料,制备了MnO2-MoO3前驱物,并将其用氨水溶解,得到非晶MnO2。用XRD、TEM及EDAX进行了表征,样品为非晶MnO2。用电极循环伏安研究其电容性能：在1 mol·L^-1Na2SO4溶液中,电位窗口为-0.2-0.8 V（vs SEC）范围内,5 mV·s^-1的扫描速度下,制备的非晶MnO2比电容为356.72 F·g^-1,经过100次循环后,电容量仅下降了5.5%,具有良好的可逆循环性能。Amorphous MnO2 was prepared by using KMnO4,H2O2 and （NH4）6Mo7O24·4H2O as raw materials via depositing,washing, calcining, and dissolving with ammonia. The synthesized product was characterized by XRD, TEM ,EDAX, and the test results show that the product is amorphous MnO2. The capacitive performance of MnO2 was measured by cyclic voltammetry （CV） method. The results indicate that in 1 mol·L^-1 Na2SO4 electrolyte in the range of-0.2-0.8 V （vs SCE）,at the scan rate of 5 mV·s^-1,amorphous MnO2 exhibits a specific capacitance value of 356.72 F·g^-1. Its capacitance only decreases 5.5% after 100 cycles, which shows the excellent cycling stability.

关 键 词：非晶二氧化锰 电容性能 超级电容器 

分 类 号：O611.5[理学—无机化学]