Godillot, Gérôme and Guerlou-Demourgues, Liliane and Taberna, Pierre-Louis and Simon, Patrice and Delmas, Claude Original Conductive Nano-Co3O4 Investigated as Electrode Material for Hybrid Supercapacitors. (2011) Electrochemical and Solid State Letters, Vol. 14 (n° 10). pp. A139-A142. ISSN 1099-0062
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Official URL: http://dx.doi.org/10.1149/1.3609259
Cobalt oxides have been extensively used as conductive additives for Ni-MH batteries. We report in this paper the performances of an original nanometric cobalt oxide, close to Co3O4, as electrode material for hybrid supercapacitors. This spinel type phase contains hydrogen, lithium, cobalt vacancies, and especially Co4þ ions within the structure, leading to a high electronic conductivity. Cyclic voltammetry and impedance spectroscopy measurements show interesting capacitance (320 F/g in 8M-KOH), as well as good electrochemical cycling with a small amount of carbon black (5%).
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