Enhancement of electrostatic induction current of energy harvester by using a gelatinized ionic liquid

Shunsuke Yamada, Hiroyuki Mitsuya, Simpei Ono, Hiroshi Toshiyoshi, Hiroyuki Fujita

Research output: Contribution to journalArticle


A gelatinized ionic liquid of [TMPA] + [TFSI] suspended in a polymer is proposed for the first time as a dielectric material for micro-electromechanical systems (MEMS) vibrational energy harvesters. Owing to the high-density charges in the electrical double layer (EDL) formed at the gel/electrode interface, a high contrast of capacitance modulation is realized, thereby enhancing the electrostatic induction current. A typical current of 4.6 µA rms cm -2 is experimentally confirmed for a 10 kΩ load resistance connected to a DC voltage of 1.5 V, which is thought to be 86-fold greater than that produced by an energy harvester with a simple air-gap.

Original languageEnglish
Pages (from-to)7-14
Number of pages8
Journalieej transactions on sensors and micromachines
Issue number1
Publication statusPublished - 2019 Jan 1
Externally publishedYes



  • Energy harvesting
  • Ionic liquid
  • Power generator
  • Vibration

ASJC Scopus subject areas

  • Mechanical Engineering
  • Electrical and Electronic Engineering

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