Highly enhanced capacitance of MgO-templated mesoporous carbons in low temperature ionic liquids

• Published in: Journal of power sources Vol. 271; pp. 377 - 381
• Main Authors: KADO, Yuya, IMOTO, Kiyoaki, SONEDA, Yasushi, YOSHIZAWA, Noriko
• Format: Journal Article
• Language: English
• Published: Amsterdam Elsevier 20.12.2014
• Subjects: Applied sciences; Capacitance; Capacitors; Capacitors. Resistors. Filters; Carbon; Diffusion; Electric double layer; Electrical engineering. Electrical power engineering; Electrode materials; Electrodes; Exact sciences and technology; Ionic liquids; Various equipment and components; Magnesium oxide; Mesoporous carbon; Diffusion resistance of the ions; Electrolytic capacitor; Carbon; Porous material; Mesoporosity; Ionic liquid; Template; Transport process; Resistance; Magnesia; Supercapacitor; Capacitance; Diffusion; Magnesium Oxides; Physicochemical properties; Low temperature
• ISSN: 0378-7753; 1873-2755
• DOI: 10.1016/j.jpowsour.2014.08.008

MgO-templated mesoporous carbons with high specific surface areas were employed for the electrode materials of electric double layer capacitors (EDLCs) in low temperature ionic liquids. The mesoporous carbons exhibit strongly enhanced capacitance in ionic liquids at 20 to -40 [degrees]C compared to conventional activated carbons. Mesopores in the carbon electrodes provide a smooth pathway for the ions, and minimize the temperature influence on the diffusion resistance of the ions. Thus, this paper confirms that mesoporous carbons work as electrode materials to achieve highly enhanced capacitances below 0 [degrees]C in ionic liquids, which leads to wide ranging applications of EDLC devices.