Preparation and Characteristics of a Matrix Retaining Electrolyte for a Phosphoric Acid Fuel Cell Using Non-volatile Solvent, NMP

비휘발성 용매(NMP)를 사용한 인산형 연료전지(PAFC)용 전해질 매트릭스 제조 및 특성

  • 윤기현 (연세대학교 재료공학부) ;
  • 양병덕 (연세대학교 재료공학부)
  • Published : 2000.01.01

Abstract

Preparation and characteristics of a matrix retaining electrolyte using SiC whisker, PES binder, and NMP(n-methyl-2-pyrrolidone) as a non-volatile solvent for a phosphoric acid fuel cell were investigated. The conditions of binder and plasticizer, and the effects of substituting a volatile solvent by a non-volatile solvent were also studied. The minimum amount of the binder was about 17 wt% for the proper bubble pressure and surrounding SiC whiskers. And the maximum amount of the plasticizer was about 10wt% to be fitted into the polymer chain of the binder. The matrix prepared by using a non-volatile solvent needed longer time to dry, and its pore size was smaller compared with that of the matrix prepared by using volatile solvent. The small pore size resulted in decrease of the overall pore volume. The ionic conductivity in the condition of the same thickness was decreased due to decrease of phosphoric acid absorbancy. As the internal resistance of the electrolyte increased, the fuel cell performance slightly decreased.

Keywords

References

  1. Fuel Cell Systems L. J. M. J. Blomen;M. N. Mugerwa
  2. Fuel Cell Handbook A. J. Appleby;F. R. Foulkes
  3. J. Electro chem. Soc. v.142 no.1 Proton Deficiency in a Phosphoric Acid Fuel Cell J. Aragane;H. Urushibata;T. Murahashi
  4. Process for Forming a Fuel Cell Matrix R.C. Stewart, Jr.
  5. Silicon Carbide Electrolyte Retaining Matrix for Fuel Cell R.D. Breault
  6. Silicon Carbide Matrix for Fuel Cells J. C. Tricciola;J. Powers;R. G. Martin
  7. J. Appl. Electrochem. Electrode/Matrix Interfacial Characteristics in a Phosphoric Acid Fuel Cell K. H. Yoon;J. Y. Choi;J. H. Jang;Y. S. Cho;K. H. Jo
  8. Materials Science & Technology v.17A Tape Casting H. Hellebrand;R. W. Cahn(ed.);P. Haasen(ed.);E. J. Kramer(ed.)
  9. Journal of Membrane Science v.133 Formation of Ultrathin High-performance Polyethersulfone Hollow-fiber Membranes T. S. Chung;S. K. Teoh;X. Hu
  10. Additives for Plastics v.2 R. B. Seymour
  11. J. Am. Ceram. Soc. v.73 no.1 Theory of Drying G. W. Scherer
  12. lmpedance Spectroscopy J. R. Macdonald
  13. J. Mater. Sci. Lett. v.17 Impendance Characteristics of a Phosphoric Acid Fuel Cell K. H. Yoon;J. H. Jang;Y. S. Cho.