Supercapacitance of MnO2 thin film electrodes prepared using jet printing method

作者：Yang Jian Jun; Huang Jun Jie; Jiang Zhi Yu^*

来源：Acta Physico - Chimica Sinica, 2007, 23(9): 1365-1369.

• MnO2
• ultra thin electrode
• jet printing
• supercapacitor

MnO2 particles in the size less than 200 nm were prepared via the oxidation of MnSO4 using KMnO4 as oxidizer. The printing `ink' was prepared by mixing MnO2 particles with acetylene black, dispersion additive Lomar-D, ethanolamine, binder CMCS and distilled water in the mass ratio of 200:40:4:1:1.:4000, and dispersing under ultrasonic. The ultra thin MnO2 film electrodes were prepared by means of computer jet printing technique using this `ink'. The SEM images showed that the surface of the ultra thin MnO2 film electrode was uniform, and its thickness was about 2.5 mu m. In 1 mol . L-1 Li2SO4, solution the electrodes present typical electrochemical supercapacitance behavior observed by voltammetry and charge-discharge measurements, in the potential region of 0-0.85 V(vs SCE). Its specific capacitance reached to 154 F . g(-1) at the discharge current of 9.4 A . g(-1), and remained almost no change after 2000 cycles.

• 出版日期2007-9
• 单位复旦大学