Authors: Ling Liu Jie Yang Qinghan Meng
Publish Date: 2013/06/04
Volume: 67, Issue: 2, Pages: 304-311
Abstract
A new synthesis route based on polycondensation of phenol and formaldehyde crosslinked by graphene oxide GO was developed Wet gel after gelation was converted into an organic xerogel by ambient pressure drying to obtain GOcrosslinked phenol–formaldehyde PF organic xerogels GOCPFOX Graphenecrosslinked PF carbon xerogels GCPFCX were produced by carbonization The morphology and chemical structure of GOCPFOX and GCPFCX were analyzed The electrochemical behavior of GCPFCX as an electrode material in electric doublelayer capacitors EDLCs was investigated Results show that the high mechanical strength of GO increased the gel skeleton strength thus organic xerogels exhibit very low drying shrinkage Scanning electron micrographs indicated that addition of GO altered the gel structure Thus when GO was added into the PF solution the PF molecular chains were anchored on the surface of GO by chemical and physical interaction The GCPFCX10 sample achieved the highest specific surface area mesoporous volume and specific capacity with 378 m2/g 056 cm3/g and 116 F/g respectively Hence GCPFCX is a potential material for EDLCs owing to its low production cost and ability to avoid supercritical drying
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