Effect of Pore Structure on the Electrochemical Capacitive Performance of MnO[sub 2]

Three types of porous : ordered mesoporous , disordered mesoporous , and disordered porous were synthesized using hard template, self-assembly, co-precipitation methods, respectively. The electrochemical capacitance profiles have been evaluated in aqueous solution by means of cyclic voltammetry and impedance measurements. The capacitance profile of the three types of 1D tunnel structure is clearly dependent upon its pore structure despite its crystalline structure. The three porous deliver a capacitance of . Compared to the disordered porous , the ordered mesoporous and disordered mesoporous , especially for the ordered mesoporous , shows better rate capability due to the unique structure of their well ordered mesoporous network, which is more favorable for fast ionic transport than in the disordered porous .