Synthesis and characterization of novel B/C materials prepared by 9-chloroborafluorene precursor

Raymond Hu, Tze-chiang Chung

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Abstract

This paper describes a novel boron containing carbon (B/C) material which contains up to 7 mole% of boron atoms substitutionally incorporated in the graphitic structure. The chemistry involves the use of 9-chloroborafluorene precursor and the thermo-transformation reaction. 9-Chloroborafluorene was firstly oligomerized to mesophase boron containing pitch (B-pitch) which is processable by solution and melt. The mesophase B-pitch was then pyrolyzed at various temperatures (up to 2300°C) to produce B/C material with high yield (∼80%). During pyrolysis, boron is not only substitutionally incorporated in the graphitic structure but also enhances the graphitization reaction. An unusually large crystallite size and small d-spacing between interlayers of the B/C product was observed by X-ray diffraction.

Original languageEnglish (US)
Pages (from-to)1181-1190
Number of pages10
JournalCarbon
Volume34
Issue number10
DOIs
StatePublished - Jan 1 1996

All Science Journal Classification (ASJC) codes

  • Chemistry(all)

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