A novel graphene based nanocomposite for application in 3D flexible micro-supercapacitors. (20th May 2016)

• Record Type: Journal Article
• Authors: Marasso, S L; Rivolo, P; Giardi, R; Mombello, D; Gigot, A; Serrapede, M; Benetto, S; Enrico, A; Cocuzza, M; Tresso, E; Pirri, C F
• Is Part Of: Materials research express. Volume 3:Number 6(2016)
• Publication Date: 2016-05-20
• Subjects: micro-supercapacitor -- MoO2 -- pseudocapacitor -- EDL -- reduced graphene oxide; Materials science -- Research -- Periodicals; Materials science -- Periodicals; 620.11
• DOI: 10.1088/2053-1591/3/6/065001
• Languages: English
• ISSNs: 2053-1591

Abstract

Abstract: In this work a hybrid graphene-based flexible micro-supercapacitor (MSC) exploiting a novel composite material was fabricated and extensively characterized. The MSC electrodes have been obtained from a synthesized composite aerogel of reduced graphene oxide and polycrystalline nanoparticles of molybdenum (IV) oxide (MoO2 ) and then dispersed in a solution containing poly(3, 4-ethylenedioxythiophene) (PEDOT). Usually in MSCs the electrons have to percolate through the nanostructured Three-dimensional (3D) matrix in order to reach the collectors, made by metal thin films that provide electrical contacts only on the surface of active material. In the attempt to enable a more efficient charge transfer and to allow direct electrical contact without metal deposition, in this study a highly doped PEDOT acting both as current collector and as binder for the nanocomposite material has been employed. 3D MSCs were fabricated through a Lithographie, Galvanoformung, Abformung (LIGA)-like process to obtain high aspect ratio microstructures in polydimethylsiloxane replicas. Capacitance values of 94 F g −1 for the nanocomposite and of 14 mF cm −2 for the device were achieved. Moreover, bending test has demonstrated good performance preservation in a U shape conformation of the device.