Prospects of on-chip fuel cell performance: Improvement based on numerical simulation

Satoshi Tominaka, Sousuke Ohta, Tetsuya Osaka, Richard Alkire

Research output: Contribution to journalArticle

14 Citations (Scopus)

Abstract

On-chip fuel cells are promising power sources for future electronics and microdevice applications including on-chip sensors and micro-air-vehicles. Previously, we reported a small scale (0.4 mm wide and 6 mm long) on-chip fuel cell of an air-breathing, membrane-less and monolithic design, which exhibited the highest power for an on-chip fuel cell, 1.4 μW (J. Am. Chem. Soc., 2008, 130, 10456). In order to improve the performance, precise understanding of the phenomena occurring in the cells is of primary importance. Thus, this paper focuses on understanding cell operation by using numerical simulation, and on implementing cell improvements based on the simulation results. The initial quantitative study concluded that the performance of the on-chip fuel cell was limited owing to oxygen-supply caused by cathode flooding. Thus, we experimentally added the hydrophobic ionomer (Nafion) onto the cell to reduce the influence of the flooding, and successfully increased the maximum power from 2.0 to 2.8 μW. This power is considered sufficient for microsensor application. On the basis of additional simulation results, we show that performance may potentially be improved to over 100 μW by increasing the effective surface areas of catalysts to a level comparable with methanol fuel cells. If successful, such performance enhancements would position the on-chip fuel cell as a viable candidate for future micro-devices, and point to promising directions for fuel cell development efforts.

Original languageEnglish
Pages (from-to)162-171
Number of pages10
JournalEnergy and Environmental Science
Volume4
Issue number1
DOIs
Publication statusPublished - 2011 Jan

Fingerprint

fuel cell
Fuel cells
Computer simulation
simulation
flooding
Methanol fuels
Oxygen supply
Micro air vehicle (MAV)
Microsensors
Ionomers
air
methanol
Cathodes
Electronic equipment
surface area
catalyst
membrane
sensor
Membranes
oxygen

ASJC Scopus subject areas

  • Renewable Energy, Sustainability and the Environment
  • Environmental Chemistry
  • Pollution
  • Nuclear Energy and Engineering

Cite this

Prospects of on-chip fuel cell performance : Improvement based on numerical simulation. / Tominaka, Satoshi; Ohta, Sousuke; Osaka, Tetsuya; Alkire, Richard.

In: Energy and Environmental Science, Vol. 4, No. 1, 01.2011, p. 162-171.

Research output: Contribution to journalArticle

Tominaka, Satoshi ; Ohta, Sousuke ; Osaka, Tetsuya ; Alkire, Richard. / Prospects of on-chip fuel cell performance : Improvement based on numerical simulation. In: Energy and Environmental Science. 2011 ; Vol. 4, No. 1. pp. 162-171.
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