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Highly porous diamond foam as a thin-film micro-supercapacitor material

: Gao, F.; Wolfer, M.; Nebel, C.E.


Carbon 80 (2014), pp.833-840
ISSN: 0008-6223
Journal Article
Fraunhofer IAF ()

In this paper diamond foam (DF) is introduced as a new material for thin-film supercapacitor application. Geometrical, structural, and electrical and electrochemical properties with respect to capacitance, electrochemical window and power are discussed in details. Diamond foam shows a 2.5 V potential window in aqueous solution. Discharge rate as high as 1000 V s(-1) was measured which is three magnitudes higher than conventional supercapacitors. The power performance of diamond foam (807 W cm(-3)) approaches that of electrolytic capacitors, but the energy storage is more than one magnitude higher. Therefore, this new material is very promising for high-power micro-supercapacitor applications.