电源技术2009，Vol.33Issue(9)：777-780,4.
分散剂对MnO_2/AC电化学电容性能的影响
Influence of dispersant on capacitance performance of manganese dioxide/activated carbon composites
摘要
Abstract
The amorphous manganese dioxide/activated carbon composites were synthesized with the addition of different series of PEG dispersants by a chem-mixed method. The influence of different dispersants on the performance of MnO_2/AC was studied using X-ray diffraction, constant current charge-discharge, alternate current impendence and cyclic voltammetry. The experimental results show that the polymerization degree of the PEG dispersants has an obvious effect on the electrochemical capacitance performance of MnO_2/AC materials. The electrochemical hybrid supercapacitor was assembled with the PEG400 composite material as the positive electrode and activated carbon as the negative electrode, with a maximum specific capacitance of the composites being 366 F/g in 100 mA/g current density. The capacitance of the capacitor was still kept more than 94% after 500 charge-discharge cycles in 6 mol/L KOH aqueous solutions. The composite materials exhibit good supercapacitance behaviors, such as high reversible characteristics and excellent cycle stability.关键词
超级电容器/二氧化锰/活性炭/化学混合法Key words
supercapacitor/ manganese dioxide/activated carbon composites/ chem-mixed method分类
信息技术与安全科学引用本文复制引用
常敬杭,张建民,兰梦,石永伉..分散剂对MnO_2/AC电化学电容性能的影响[J].电源技术,2009,33(9):777-780,4.基金项目
国家自然科学基金资助项目(20873126),郑州市科技攻关项目(083SGYG261 22-1) （20873126）
