Brousse, Thierry and Taberna, Pierre-Louis and Crosnier, Olivier and Dugas, Romain and Guillemet, Philippe and Scudeller, Yves and Zhou, Yingke and Favier, Frédéric and Bélanger, Daniel and Simon, Patrice Long-term cycling behavior of asymmetric activated carbon/MnO2 aqueous electrochemical supercapacitor. (2007) Journal of Power Sources, vol. 173 (n° 1). pp. 633-641. ISSN 0378-7753
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Official URL: http://dx.doi.org/10.1016/j.jpowsour.2007.04.074
Activated carbon–MnO2 hybrid electrochemical supercapacitor cells have been assembled and characterized in K2SO4 aqueous media. A laboratory cell achieved 195,000 cycles with stable performance. The maximal cell voltage was 2V associated with 21±2Fg−1 of total composite electrode materials (including activated carbon andMnO2, binder and conductive additive) and an equivalent serie resistance (ESR) below1.3cm2. Long-life cycling was achieved by removing dissolved oxygen from the electrolyte, which limits the corrosion of current collectors. Scaling up has been realized by assembling several electrodes in parallel to build a prismatic cell. A stable capacity of 380 F and a cell voltage of 2V were maintained over 600 cycles. These encouraging results show the interest of developing such devices, including non-toxic and safer components as compared to the current organic-based devices.
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