Coating single walled carbon nanotube with SnO2 and its electrochemical properties

Electrochemical reduction of CO2 on SnO2/nitrogen-doped multiwalled carbon nanotubes composites in KHCO3 aqueous solution

“…2(c) and (d), the SnO 2 /N-MWCNTs modified GCE produces nearly rectangular curves when the potential sweep range is from 0 to À 0.9 V, indicating that the SnO 2 /N-MWCNTs have capacitive behavior [15]. There is an obvious oxidation peak at À 0.76 V under N 2 atmosphere (Fig.…”

Relative contributions of quantum and double layer capacitance to the supercapacitor performance of carbon nanotubes in an ionic liquid

“…1,[5][6][7][8][9] EDLCs, however, have poor energy density when compared to batteries, which has motivated research into improving the capacitance of these devices. [9][10][11][12][13][14][15][16][17] Recently, carbon nanotube (CNT)-based electrodes in EDLCs have demonstrated superior performance compared to conventional activated carbon electrodes. [18][19][20][21][22][23] In the case of vertically aligned arrays of multiwalled CNTs (MWCNTs), Honda and coworkers demonstrated that the capacitance was inversely related to the MWCNT diameter while directly proportional to the MWCNT packing density.…”

Ultrafine MnO2nanowires grown on RGO-coated carbon cloth as a binder-free and flexible supercapacitor electrode with high performance

“…42 The cause may be that there was insufficient time available for positive ions (H + and Na + ) to reach the inner small pores of the MnO 2 materials at high scan rate and hence they were mostly adsorbed on the outer surface of the electrode, 22,43 while at lower scan rate, cations could effectively diffuse into all the available spaces of electrode materials and thus lead to abundant insertion reaction to obtain a high specic capacitance. [44][45][46][47] Therefore, only the intercalation part decreases with the increase of scan rate, whereas the surface capacitance keeps almost constant. In order to further nd the charge storage capacity quantitatively, GCD measurements at different current densities are shown in Fig.…”