HTPEM - High Temperature PEM Fuel Cells Portal Page

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This portal page aggregates information relevant to High Temperature PEM Fuel Cells including membranes, plates, stacks, systems, materials and components.

Why the need for High Temperature PEM Fuel Cell

  • Stationary - Click here for micro CHP products using HTEPM stacks.
    • Tolerance to Impurities - High temperature systems (above 120C) have higher tolerances to impurities (particularly CO) in the hydrogen. The optimum tolerance to impurities is at temperatures exceeding 150C which is best suited to stationary systems. For stationary applications (over 150C) the CO tolerance would eliminate some fuel processor (reformer) components.
    • Operating Temperature - Due to structural limitations current water-based (low temperature PEM) membranes can only work up to 80C. HTPEM membranes have been demonstrated to operate up to 210C. At the higher temperatures (over 150C) the system takes longer to start-up and is therefore suited to stationary applications.
  • Automotive - Low temperature Fuel cell stacks operating at 80C require large radiators/heat exchangers to extract the heat. There are potential 50% reductions to radiator size using HTPEM.
  • Performance - Increasing the operating temperature of the system increases the electrode kinetic rates which improves the performance of the fuel cell
  • Water management as high temperature membranes are generally non-water based there is no need for humidification which reduces system complexity and cost.

Industry requirements

  • Operating temperature
    • Automotive - over 120C
    • Stationary - over 150C
  • Low cost
  • High tolerance to impurities
  • Durable
  • Long term chemical and mechanical stability
  • Low resistance
  • Increased stability must not compromise conductivity

HTPEM membranes require less porous plates than low temperature PEM. This is due to acid leaching from the membrane, click here to view plates ideally suited to HTPEM

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