The Transactions of the Korean Institute of Electrical Engineers C (대한전기학회논문지:전기물성ㆍ응용부문C)

The Korean Institute of Electrical Engineers (대한전기학회)
권호 표지

Fabrication and Test of Micro Direct Methanol Fuels using Platinum Sputtered Microcolumn Electrodes with a Limited Fuel Source

백금 촉매가 증착된 미소돌기 전극과 유한 연료를 가지는 극소형 직접메탄을 연료전지의 제작 및 성능 평가

  • 서영호 (한국과학기술원 기계공학과) ;
  • 조영호 (한국과학기술원 기계공학과)
  • Published : 2004.04.01
Download PDF
⟨ Previous Next ⟩

Abstract

We present a miniature Direct Methanol Fuel Cell (micro-DMFC) using platinum sputtered microcolumn electrodes with a limited amount of fuel. We use the microcolumn electrode in order to improve the power density of the micro-DMFC that consists of two electrodes and polymer electrolyte. We also design the built-in fuel chamber in the anode for the portable electronics applications. We design and fabricate both microcolumn and planar electrodes, having an identical projective area of 5mm${\times}$5mm. The diffusion current density of the microcolumn electrode is 1.73 times higher than that of the planar electrode at electrode potential of 1.1V in the half-cell test. The micro-DMFC based on the microcolumn electrodes shows the maximum power of 10.8$\pm$7.54㎼(43.23$\pm$0.16㎼/$\textrm{cm}^2$) at the projective area of 5mm${\times}$5mm, while the planar electrode micro-DMFC shows the maximum power of 0.81$\pm$0.42㎼(3.24$\pm$1.68㎼/$\textrm{cm}^2$) at the same projective area. The micro-DMFC based on the microcolumn electrodes shows 13 times higher power density that the micro-DMFC based on the planar electrodes does.

Keywords

References

  1. C. Zhang, K. Najafi, L. P. Bernal, and P. D. Washabaugh, 'An Integrated Combustor-Thermoelectric Micro Power Generator,' Proc. Solid-State Sensors and Actuators, Munich, Germany, June 10-14, 2001, pp.120-124
  2. C.B. Williams, and R.B. Yates, 'Analysis of a Micro-Electric Generator for Microsystems,' Sensors and Actuators, A(52) https://doi.org/10.1016/0924-4247(96)80118-X
  3. C.-C. Lin, Chodssi, A.A. Ayon, D.-Z. Chen, and S. Jacobson, 'Fabrication and Characterization of a Micro Turbine/Bearing Rig,' Proc. IEEE Micro Electro Mechanical Systems Conference, Orlando, Florida, USA, January 17-21, 1999, pp.529-533 https://doi.org/10.1109/MEMSYS.1999.746884
  4. N.M. White, P. Glynne-Jones, and S.P. Beeby, 'A Novel Thick-film Piezoelectric Micro-generator,' Smart Materials and Structures, Vol.10, 2001, pp.850-852 https://doi.org/10.1088/0964-1726/10/4/403
  5. K.B. Lee, L. Lin, 'Electrolyte based On-Demand and Disposable Microbattery,' Proc. IEEE Micro Electro Mechanical Systems Conference, Las Vegas, USA, 2002, pp.236-239 https://doi.org/10.1109/MEMSYS.2002.984246
  6. EG&G services, Parsons Inc., Science Application International Corporation, Fuel Cell Handbook, U.S. Department of Energy, Fifth edition, 2000
  7. S.C. Kelley, G.A. Deluga, and W.H. Smyrl, 'A Miniature Methanol/Air Polymer Electrolyte Fuel Cell,' Electrochemical and Solid-State Letters, Vol.3, No.9, 2000, pp407-409 https://doi.org/10.1149/1.1391161
  8. W.Y. Sim, G.Y. Kim, and S.S. Yang, 'Fabrication of Micro Power Source using a Micro Direct Methanol Fuel Cell for the Medical Application,' Proc. IEEE Micro Electro Mechanical Systems Conference, Interlaken, Switzerland, January 21-25, 2001, pp.341-344 https://doi.org/10.1109/MEMSYS.2001.906548
  9. J.D. Kim, Enhancing the Efficiency of Direct Methanol Fuel Cell via Surface Modification of Polymer Electrolyte and Combinatorial Anodic Catalyst, Master Thesis, KAIST. (2000)
  10. John O'M. Bockris, and Amulya K.N. Reddy, Midern Electrochemistry, Plenum Press.New York, 1977