摘要
采用液相共沉淀法制备了一种含Mn、S、O的无定型粉末材料,元素分析结果表明其组成为MnS0.4O0.8。采用XRD、SEM对其进行了物理表征。通过循环伏安和恒流充放电研究了其电容行为。结果表明:在1mol.L-1Na2SO4溶液中该材料具有良好的电容性能。当扫描速度为2mV.s-1时,其比电容为131F.g-1,经历500循环后其比电容还能保持初始值的94.8%,表现了良好的稳定性。恒流充放电实验结果表明材料的可逆性良好。此材料可作为电化学超级电容器的一种新的候选材料。
Amorphous powder material（MnS0.4O0.8） was prepared by a chemical precipitation method and its electrochemical capacitance characterization was for the first time studied.The structure and surface morphology of the obtained powder were characterized by X-ray diffraction（XRD） and scanning electron microscopy（SEM）.The supercapacitive behavior was studied by means of cyclic voltammetry（CV）,and constant current charge-discharge cycling（CD）.A maximum specific capacitance of 131F·g-1 was obtained for this material.Furthermore,the specific capacitance remained 94.8% of the original value after 500 cycles.The results indicated that MnS0.4O0.8 maybe a promising electrode material for electrochemical supercapacitors.
出处
《广州化工》
CAS
2010年第5期163-165,178,共4页
GuangZhou Chemical Industry
