A novel method to prepare nanostructured manganese dioxide and its electrochemical properties as a supercapacitor electrode

作者：Jiang Rongrong; Huang Tao; Liu Jiali; Zhuang Jihua; Yu Aishui^*

来源：Electrochimica Acta, 2009, 54(11): 3047-3052.

DOI：10.1016/j.electacta.2008.12.007

• Manganese dioxide
• Supercapacitor
• Pluronic P123

Nanostructured MnO(2) was synthesized by co-precipitation in the presence of Pluronic P123 surfactant and characterized by X-ray diffraction (XRD), infrared spectroscopy (IR), scanning electron microscope (SEM) and transmission electron microscope (TEM). The sample without surfactant was spherical with particle size on the submicron scale, whereas P123-assisted samples were all loose clew shapes, consisting of MnO(2) nanowires, 8-20 nm in diameter and 200-400 nm in length. The electrochemical performances of the as-prepared MnO(2) as the electrode materials for supercapacitors were evaluated by cyclic voltammetry and galvanostatic charge-discharge measurements in a solution of 1 M Na(2)SO(4). The sample without surfactant exhibited a relatively low specific capacitance of 77 Fg(-1), whereas the nanostructured MnO(2) prepared with 0.02% (wt%) P123 exhibited excellent pseudocapacitive behavior, with a maximum specific capacitance of 176 Fg(-1).

• 出版日期2009-4-15
• 单位复旦大学