Graphene oxide nanofibers: synthesis and electrochemical properties

1 figure.-- Abstract of the poster presented at the CESEP’19 Conference: 8th International Conference on Carbon for Energy Storage and Environment Protection, October 20-24th, Alicante (Spain).-- © Universidad de Alicante.Graphene-based materials are very attractive for numerous applications such as electronics, sensors, energy-storage materials, composites or catalytic supports. Among the routes for the synthesis of these materials, obtaining them from graphitic carbon using chemical routes followed by ultrasonic exfoliation allows scalable processing in liquid suspension. Carbon nanofilaments can be used for graphene preparation as an alternative to the use of synthetic graphite [1], whose environmental sustainability and cost are penalized by the use of coke from petroleum processing and graphitization treatment at high temperature (> 2500 °C), respectively. In this work, fishbone carbon nanofibers (CNF) were subjected to different oxidation ratios (OR = KMnO4/CNF) and ultrasound assisted exfoliation (1 or 2 h) to obtain graphene oxide nanofibers (GONF, Figure 1a), i.e. filamentous-like structures with ca. 0.75 nm interlayer spacing. The different levels of exfoliation and surface chemistry are key in their tunable electrochemical behaviour it terms of capacitance.The authors acknowledge the funding of the FEDER and the Spanish Ministry of Science and Universities (MICINN) (ENE2014-52189-C02-01-R). DS thank also MICINN for his Ramón y Cajal research contract (RyC-2016-20944).Peer reviewe