Pb(PbO)负载对活性炭超级电容性能的影响及其机理  

Influence of Pb （PbO） on the supercapacitive properties of activated carbon and its mechanism analysis

作　　者：高云芳[1] 王艳平[1] 王福华[1] 姚秋实[1] 任冬雷[1] 宋云龙[1] 徐新[1] 

机构地区：[1]浙江工业大学化学工程与材料学院,浙江杭州310014

出　　处：《炭素》2014年第2期7-12,共6页Carbon

摘　　要：采用超声浸渍结合还原分解的方法制得了nano—Pb（PbO）／AC复合改性材料。利用XRDSEMEDS、N2吸脱附（BET）、循环伏安（CV）等对铅负载后活性炭材料的微观结构和电化学性能进行了表征。结果显示粒径小于100nm Pb、PbO颗粒均匀地分布在活性炭表面。负载后活性炭比表面积和孔容稍有减少，孔径分布变化不明显。Pb（PbO）／AC复合改性材料具有良好的导电性，提供了一定的氧化还原电流，在0．1A／g电流密度下非法拉第比容量损失仅6．5％。The lead （lead oxide）/activated carbon （Pb （PbO）/AC） composites were prepared using the method of ultrasonic impregnation followed by reductive decomposition. The composites were characterized by X-ray diffraction （XRD）, scanning electron microscope （SEM）, energy dispersive spectroscopy （EDS）, nitrogen absorption/ desorption, cyclic voltammetry （CV）, galvanostatic charge-discharge and electrochemical impedance spectroscopy （EIS）. The particles of Pb/PbO with the size of about 100 nm are uniformly dispersed on the surface of activated carbon. The specific surface area and pore volume of the composites slightly decrease, but the change of the pore size distribution is not obvious. Pb （PbO）/AC possesses high electrical conductivity and provided a certain of redox current. The capacitance of activated carbon decrease only 6.5% at 0.1A/g. Based upon the experimental results, the forming process of the composites and the effect of modified treatment on supercapacitive properties and its mechanism are discussed in this paper.

关 键 词：活性炭 铅 法拉第电容 电化学性能 超级电容器 

分 类 号：TQ424.19[化学工程]