Aqueous electrostatic dispersion and heterocoagulation of multiwalled carbon nanotubes and manganese dioxide for the fabrication of supercapacitor electrodes and devices

A conceptually new approach has been developed for the fabrication of MnO2-multiwalled carbon nanotube (MWCNT) composites for electrodes of electrochemical supercapacitors (ES). Benzyldimethylhexadecylammonium chloride (BAC) surfactant and caffeic acid (CA) selectively adsorbed on MWCNT and MnO2, respectively, and allowed the formation of stable aqueous suspensions of positively charged MWCNT and negatively charged MnO2. The comparison of the …