α-MnO_2纳米针的电容性能  

Capacitive Performance of α-MnO_2 Nanoneedles

作　　者：任铜彦 韩园园[2] 张萌萌[2] 何平[2] 张便利[2] 

机构地区：[1]川北医学院化学教研室,四川南充637000 [2]西华师范大学化学化工学院化学合成与污染控制四川省重点实验室,四川南充637009

出　　处：《化学与生物工程》2014年第7期61-63,共3页Chemistry & Bioengineering

基　　金：川北医学院科研发展项目(CBY13-A-QN32)

摘　　要：通过简单的水热法合成了α-MnO2纳米针，将其用作超级电容器电极材料，通过循环伏安和恒电流充放电测试手段对α-MnO2纳米针电极进行分析。结果表明，以1 mol· L-1 Na2 SO4为电解液，电极在-0.6～0.6 V的电压范围内具有良好的法拉第电容特性；在电流密度为0.01 A·g-1时，电极的比电容最高达56.7 F·g-1，且500次循环后，比电容保持率为82％，表明其具有良好的循环性能。α-MnO2 Nanoneedles were synthesized by simple hydrothermal method and had been used as the supercapacitor electrode materials.Theα-MnO2 nanoneedles electrodes had been characterized by cyclic voltam-metry and galvanostatic charge-discharge tests.The results indicated that the electrodes had good Faraday ca-pacitive performance in the range of -0.6~0.6 V by using 1 mol·L-1 Na2 SO4 solution as electrolyte.Under current density of 0.01 A·g-1 ,the specific storage could up to the highest of 56.7 F·g-1 ,and remained 82%after 500 cycles,which showed the electrode possessed good cyclic stability.

关 键 词：超级电容器 α-MnO2 纳米针电极 比电容 循环寿命 

分 类 号：TQ131.2[化学工程—无机化工]