Ordered mesoporous silicon carbide-derived carbon for high-power supercapacitors

Wan-Yu Tsai (1, 2) , Peng-Cheng Gao (2, 3) , Barbara Daffos (1, 2) , Pierre-Louis Taberna (1, 2) , Carlos R. Pérez (4) , Yury Gogotsi (4) , Frédéric Favier (2, 3) , Patrice Simon (1, 2)

1 CIRIMAT - Centre interuniversitaire de recherche et d'ingenierie des matériaux
2 RS2E - Réseau sur le stockage électrochimique de l'énergie
3 ICGM ICMMM - Institut Charles Gerhardt Montpellier - Institut de Chimie Moléculaire et des Matériaux de Montpellier
4 Drexel University

Micro/mesoporous carbon was prepared by chlorination of ordered mesoporous silicon carbide derived from magnesio-thermal reduction of templated carbon-silica precursors. These materials were then used as active materials for electrochemical capacitors and characterized in 1.5 M NEt4BF4/AN. The electrodes showed outstanding rate capability (90% of capacity retention at 1 V/s and time constant of 1 s) with high specific areal capacitance (0.5 F/cm2 of electrode), that makes such hierarchical porous carbons promising for high power and energy density supercapacitors.

Mots clés: Supercapacitors Carbon; Hierarchical porosity; Magnesio-thermal reduction; Power density

Domaines: Matériaux; Matériaux

Wan-Yu Tsai, Peng-Cheng Gao, Barbara Daffos, Pierre-Louis Taberna, Carlos R. Pérez, et al.. Ordered mesoporous silicon carbide-derived carbon for high-power supercapacitors. Electrochemistry Communications, 2013, vol. 34, pp. 109-112. ⟨10.1016/j.elecom.2013.05.031⟩. ⟨hal-01154291⟩