Nickel foam-based manganese dioxide–carbon nanotube composite electrodes for electrochemical supercapacitors

Manganese dioxide nanofibers with length ranged from 0.1 to 1μm and a diameter of about 2–4nm were prepared by a chemical precipitation method. Composite electrodes for electrochemical supercapacitors were fabricated by impregnation of slurries of the manganese dioxide nanofibers and multiwalled carbon nanotubes (MWCNTs) into porous nickel foam current collectors. In the composite electrodes, MWCNT formed a secondary conductivity network within …