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Ion Transfer Across Fuel Cell Membranes

Ion Transfer Across Fuel Cell Membranes. Chaffin Ross Whitefish High School Independent Study. Interest. Earth Science Energy Unit Chemistry Space Station. Background. What is a hydrogen fuel cell? How does a fuel cell work? What is the membranes function in a fuel cell?.

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Ion Transfer Across Fuel Cell Membranes

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  1. Ion Transfer Across Fuel Cell Membranes Chaffin Ross Whitefish High School Independent Study

  2. Interest • Earth Science Energy Unit • Chemistry • Space Station

  3. Background • What is a hydrogen fuel cell? • How does a fuel cell work? • What is the membranes function in a fuel cell?

  4. Proton Exchange Membrane • Chemical Energy = Electrical Energy • H2 2H++ 2e- • Protons permeate through • Electrons travel along load circuit

  5. Question/ Hypothesis • How does temperature affect the ion transfer across fuel cell membranes? • Lower at 32-40 degrees • Higher at temperatures 90-95 degrees

  6. Procedure • Independent Variable: Temperature • Dependent Variable: Ion Transfer (Conductance in µS/cm) • Controls: Membrane, Solutions

  7. Ion Size

  8. Data: Trial 1 (0.5 M NaCl)

  9. Data: Trial 2 (0.5 M NaCl)

  10. Data: Trial 3 (1 M NaCl)

  11. Data: Trial 4 (0.5 M KCL)

  12. Data: Trial 5 (1 M KCL)

  13. Data: Trial 6 (0.5 M ZnCl2)

  14. Data: Trial 7 (1 M ZnCl2)

  15. Implications • High Temperature Usage • Low Temperature Usage • Membrane Durability

  16. Improvements • Steady/same temperature • Use different membranes • Different Solutions

  17. Acknowledgements • Paula Kosted • Derek Tarrant • ViZn Energy • Todd Spangler

  18. Resources • Son, D. N., and H. Kasai. "Proton Transport through Aqueous Nafion Membrane." The European Physical Journal E 29.4 (2009): 351-61. Print. • Liu, Wen, Kathy Ruth, and Greg Rusch. "Membrane Durability in PEM Fuel Cells." Journal of New Materials for Materials for Electrochemical Systems 4 (n.d.): n. pag. Print. • Faulk, Michael. "An Infrared Study of Water in Perfluorosulfonate (Nafion) Membranes." Atlantic Regional Laboratory. N.p.: n.p., 1974. 1495-501. Print.

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