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Scaling Up Studies on PEMFC Using a Modified Serpentine Flow Field Incorporating Porous Sponge Inserts to Observe

Muthukumar Marappan1, Rengarajan Narayanan2, Karthikeyan Manoharan3

  • 1Fuel Cell Research Lab & Department of Mechanical Engineering, Nandha Engineering College, Erode-638052, India.

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Summary

Porous Sponge Inserts (PSI) effectively manage water in Proton Exchange Membrane Fuel Cells (PEMFC), significantly boosting performance. This study demonstrates PSI

Keywords:
EISMSSFFporous spongeproton exchange membrane fuel cells (PEMFC)scaling upwater management

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Area of Science:

  • Electrochemistry
  • Materials Science
  • Energy Conversion

Background:

  • Cathode flow channel flooding limits Proton Exchange Membrane Fuel Cell (PEMFC) performance during scale-up.
  • Water accumulation at the Gas Diffusion Layer (GDL) and cathode flow field rib interface is a key issue.

Purpose of the Study:

  • To investigate the impact of Porous Sponge Inserts (PSI) on PEMFC performance.
  • To evaluate water management strategies using PSI in different cathode flow fields.

Main Methods:

  • Experimental investigation of PEMFCs with reaction areas of 25, 50, and 100 cm².
  • Comparison of Serpentine Flow Field (SFF) with Modified Serpentine with Staggered provisions of 4 mm PSI (MSSFF).
  • Electrochemical Impedance Spectroscopy (EIS) used to validate results for 25 cm² PEMFC.

Main Results:

  • MSSFF achieved peak power densities of 0.420 W/cm² (25 cm²), 0.298 W/cm² (50 cm²), and 0.232 W/cm² (100 cm²).
  • SFF yielded lower peak power densities: 0.242 W/cm² (25 cm²), 0.213 W/cm² (50 cm²), and 0.171 W/cm² (100 cm²).
  • The 4 mm PSI significantly improved PEMFC performance through enhanced water management.

Conclusions:

  • Porous Sponge Inserts (PSI) are effective in mitigating cathode flooding in PEMFCs.
  • The Modified Serpentine with Staggered provisions of 4 mm PSI (MSSFF) demonstrates superior performance over the Serpentine Flow Field (SFF).
  • PSI integration is a viable strategy for improving PEMFC scalability and operational efficiency.