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
网络首发:2011-09-10,
纸质出版:2011
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马扬洲 1, 徐友龙 1, 肖芳 1, 等. 影响脉冲电流法制备MnO2超级电容器电极性能的因素[J]. 西安交通大学学报, 2011,45(9):114-118.
Influencing Factors on Manganese Dioxide Deposited with Pulse Current Method for Supercapacitors[J]. 2011, 45(9): 114-118.
通过正交实验法研究了影响脉冲电流法合成MnO
2
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/m
2
导通时间为0.01 s
关断时间为0.2 s
所制备的MnO
2
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2 000 mV/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/m
2
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.
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