影响脉冲电流法制备MnO_2超级电容器电极性能的因素  

Influencing Factors on Manganese Dioxide Deposited with Pulse Current Method for Supercapacitors

作　　者：马扬洲[1,2] 徐友龙[1,2] 肖芳[1,2] 白海春[1,2] 

机构地区：[1]西安交通大学电子陶瓷与器件教育部重点实验室,西安710049 [2]西安交通大学国际电介质研究中心,西安710049

出　　处：《西安交通大学学报》2011年第9期114-118,共5页Journal of Xi'an Jiaotong University

基　　金：国家"863计划"资助项目(2007AA03Z249)

摘　　要：通过正交实验法研究了影响脉冲电流法合成MnO2超级电容器电极材料性能的影响因素,发现影响效果由大到小依次为:脉冲电流关断时间,醋酸锰水溶液浓度,脉冲电流密度,脉冲电流导通时间.在正交实验法得出的最优条件下,即醋酸锰浓度为0.5 mol/L,电流密度为250 A/m2,导通时间为0.01 s,关断时间为0.2 s,所制备的MnO2薄膜电极材料表面具有丰富的纳米球结构,在10 mV/s的扫描速率下,3 mol/L的KCl溶液作为电解液,比容量可以达到575 F/g,并且在2 000mV/s的快速充放电条件下,仍然能够保持良好的电容特性.Manganese dioxide electrode with nanoball structure deposited by pulse current method has high specific capacitance and good charge-discharge characteristics.In this paper,an orthogonal experimental method was conducted to improve the capacitive characteristics of the manganese dioxide.The optimum condition is concluded as the concentration of Mn（Ac）2 of 0.5 mol/L,the current density of 250 A/m2,the on-time of 0.01 s and the off-time of 0.2 s.The obtained manganese dioxide exhibits the specific capacitance of 575 F/g at the scanning rate of 10 mV/s.When the scanning rate increases to 2 000 mV/s,ideal capacitive behavior still remains.

关 键 词：超级电容器 二氧化锰 电极材料 脉冲电流 

分 类 号：O646[理学—物理化学] TM911[理学—化学]