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Title: Emulsion soft templating of carbide-derived carbon nanospheres with controllable porosity for capacitive electrochemical energy storage
Authors: Oschatz, MartinZeiger, MarcoJaeckel, NicolasStrubel, PatrickBorchardt, LarsReinhold, RomyNickel, WinfriedEckert, JürgenPresser, VolkerKaskel, Stefan
Publishers Version:
Issue Date: 2015
Published in: Journal of Materials Chemistry A, Volume 3, Issue 35, Page 17983-17990
Publisher: Cambridge : Royal Society of Chemistry
Abstract: A new approach to produce carbide-derived carbon nanospheres of 20-200 nm in diameter based on a novel soft-templating technique is presented. Platinum catalysis is used for the cross-linking of liquid (allylhydrido)polycarbosilane polymer chains with para-divinylbenzene within oil-in-water miniemulsions. Quantitative implementation of the pre-ceramic polymer can be achieved allowing precise control over the resulting materials. After pyrolysis and high-temperature chlorine treatment, resulting particles offer ideal spherical shape, very high specific surface area (up to 2347 m^2/g^-1), and large micro/mesopore volume (up to 1.67 cm^3/g^-1). The internal pore structure of the nanospheres is controllable by the composition of the oil phase within the miniemulsions. The materials are highly suitable for electrochemical double-layer capacitors with high specific capacitances in aqueous 1 M Na2SO4 solution (110 F/g^-1) and organic 1 M tetraethylammonium tetrafluoroborate in acetonitrile (130 F/g^-1).
Keywords: Carbides; Catalysts; Crosslinking; Electrolytic capacitors; Emulsification; Polysilanes
DDC: 540
License: CC BY 3.0 Unported
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Appears in Collections:Chemie

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