On-chip micro-supercapacitors for operation in a wide temperature range

Peihua Huang (1) , David Pech (1) , Rongying Lin (2, 3) , John K. Mcdonough (4) , Magali Brunet (1) , Pierre-Louis Taberna (2, 3) , Yury Gogotsi (4) , Patrice Simon (2, 3)

1 LAAS-ISGE - Équipe Intégration de Systèmes de Gestion de l'Énergie
2 CIRIMAT - Centre interuniversitaire de recherche et d'ingenierie des matériaux
3 RS2E - Réseau sur le stockage électrochimique de l'énergie
4 Drexel University

Onion-like carbon (OLC) based micro-supercapacitor electrodes prepared by electrophoretic deposition (EPD) were combined with a eutectic mixture of ionic liquids (IL), producing a micro-supercapacitor which is able to function from −50 °C to 80 °C. This device was electrochemically characterized by cyclic voltammetry and electrochemical impedance spectroscopy at different scan rates and different temperatures. At 20 °C, a capacitance of 1.1 mF.cm−2 per footprint area of device at 200 mV.s−1 within 3.7 V was measured, hence a specific energy of 15 mJ.cm−2 and a specific power of 240 mW.cm−2. At−50 °C, 76% of the capacitance wasmaintained at 10 mV.s−1 within 3.7 V. By integrating with IL, this micro-supercapacitor can be potentially used in portable electronic devices that are required to work under temperature extremes.

Mots clés: Supercapacitor; Porous carbon; Energy

Domaines: Matériaux; Electronique

Peihua Huang, David Pech, Rongying Lin, John K. Mcdonough, Magali Brunet, et al.. On-chip micro-supercapacitors for operation in a wide temperature range. Electrochemistry Communications, 2013, vol. 36, pp. 53-56. ⟨10.1016/j.elecom.2013.09.003⟩. ⟨hal-00977350⟩