A micro-structured Si-based electrodes for high capacity electrical double layer capacitors

Valdas Krikscikas, Hiroyuki Oguchi, Hiroshi Yanazawa, Motoaki Hara, Hiroki Kuwano

Research output: Contribution to journalConference article

Abstract

We challenged to make basis for Si electrodes of electric double layer capacitors (EDLC) used as a power source of micro-sensor nodes. Mcroelectromechanical systems (MEMS) processes were successfully introduced to fabricate micro-structured Si-based electrodes to obtain high surface area which leads to high capacity of EDLCs. Study of fundamental properties revealed that the microstructured electrodes benefit from good wettability to electrolytes, but suffer from electric resistance. We found that this problem can be solved by metal-coating of the electrode surface. Finally we build an EDLC consisting of Au-coated micro-structured Si electrodes. This EDLC showed capacity of 14.3 mF/cm2, which is about 530 times larger than that of an EDLC consisting of flat Au electrodes.

Original languageEnglish
Article number012045
JournalJournal of Physics: Conference Series
Volume557
Issue number1
DOIs
Publication statusPublished - 2014 Jan 1
Event14th International Conference on Micro- and Nano-Technology for Power Generation and Energy Conversion Applications, PowerMEMS 2014 - Awaji Island, Hyogo, Japan
Duration: 2014 Nov 182014 Nov 21

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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