Preparation of silicon oxide–carbon composite from benzene and trimethoxyphenylsilane by a liquid phase plasma method for supercapacitor applications

Heon Lee, In Soo Park, Hye Jin Bang, Young Kwon Park, Eun Bum Cho, Byung Joo Kim, Sang Chul Jung

Research output: Contribution to journalArticlepeer-review

9 Scopus citations

Abstract

Silicon oxide–carbon composites (SiOCCs) were deposited directly in a reactant aqueous solution using a liquid-phase plasma (LPP) method and applied as a supercapacitor electrode. The SiOCCs formed rapidly at the initial stages of the LPP reaction by the carbonization of benzene and TMPS, but the production of SiOCC decreased over the reaction time. The SiOCCs formed cluster chains by agglomeration, which were composed mostly of carbon with oxygen and silicon distributed uniformly. A higher TMPS content in the reactant solution resulted in the inclusion of more silicon and oxygen in SiOCCs. Most of the Si components synthesized by the LPP reaction form SiO 2 bonds and some have carbon-bonded chemical structures. The SiOCCs particles were agglomerated in amorphous form with a size of approximately 10 to 40 nm and the d-spacing appeared to contain SiO 2 particles of approximately 0.31 nm. As the content of silicon oxide in SiOCCs is increased, the specific surface area increased and the specific capacitance increased. In addition, the pseudocapacitance characteristics showed the lowest resistance. On the other hand, a higher silicon oxide content in SiOCCs resulted in higher capacitance loss due to volume expansion of silicon dioxide in the charge-discharge process.

Original languageEnglish
Pages (from-to)625-631
Number of pages7
JournalApplied Surface Science
Volume481
DOIs
StatePublished - 1 Jul 2019

Keywords

  • Cyclic stability
  • Liquid phase plasma
  • Silicon oxide
  • Specific capacitance
  • Supercapacitors

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