采用液相沉淀法在碳纳米管（CNTs）的表面沉积MnO2纳米颗粒,制得了MnO2-CNTs复合材料。通过扫描电子显微镜（SEM）、X射线衍射（XRD）对材料的微观结构及成分进行了表征。利用电化学循环伏安和恒电流充放电对材料进行电化学性能测试,表明MnO2-CNTs复合材料结合了MnO2较高的质量比电容和CNTs较好的电化学稳定性的优点,质量比电容为220F/g。并将MnO2-CNTs复合材料与活性炭（AC）组装形成非对称超级电容器,发现MnO2-CNTs与AC质量比为0.75：1时,质量比电容达到最高,为306F/g。非对称电容器性能较对称电容器有较大幅度的提高,并且具有良好的电化学稳定性。
MnO2-CNTs（carbon nanotubes）composite material was successfully synthesized by depositing MnO2 nanoparticle onto the surface of CNTs with chemical coprecipitation method.This composite material was characterized by XRD and SEM.The electrochemical properties of MnO2-CNTs composite material were investigated using cyclic voltammetry and galvanostatic charge/discharge.The results showed that MnO2-CNTs composite material combines the higher specific capacitance of MnO2 and the electrochemical stability of CNTs.The specific capacitance of MnO2-CNTs electrode reaches 220F/g.And a MnO2-CNTs/AC（active carbon）asymmetrical supercapacitor was assembled.It was found that,when the mass ratio of positive electrode and negative electrode was 0.75：1,the specific capacitance of the asymmetrical supercapacitor achieved the highest value of 306 F/g which was larger than that of the symmetric supercapacitor,and the asymmetrical supercapacitor has good electrochemical stability.
参考文献
| [1] | 邓梅根,张治安,胡永达,汪斌华,杨邦朝.超级电容器碳纳米管与二氧化锰复合电极材料的研究[J].硅酸盐学报,2004(04):411-415. |
| [2] | 杨常玲,孙彦平,邴雪飞,吕永根.活性泡沫炭用于超级电容器电极材料[J].功能材料,2010(01):165-168. |
| [3] | 钟新仙,汪艳芳,王芳平,王新宇,王红强,张初华,钟镇妙.不同形貌的甲酸掺杂聚苯胺的电容性能[J].功能材料,2010(01):66-68. |
| [4] | 孙哲,刘开宇,张海峰,李傲生,徐小存.介孔-C/MnO_2非对称超级电容器的研究[J].物理化学学报,2009(10):1991-1997. |
- 下载量()
- 访问量()
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%