The H2 Automotive Challenge

Challenging the Conventional Wisdom

The demand for continuous peak power in hot ambient environments, cold start capability, and stable performance at low relative humidity are three of the key requirements that must be properly aligned for a hydrogen automotive fuel cell engine. PolyFuel is committed to engineering hydrocarbon membranes that support these demands as well as the need for high durability and low cost.

How do other membranes compare?

		95°C Polarization Curve
		Stable operation at 95°C
		2°C Polarization Curve
		Low temperature startup capability at 2°C

Experimental Conditions

		Common Conditions
		Fuel Cell Technologies:	25cm2 single cell hardware
		Membrane thickness:	50 microns
		Geometric active area (catalyst layer area):	25cm2
		Catalyst loading:	0.3mg Pt/cm2 for each anode & cathode
		GDL:	SGL 20BC anode & cathode
		H2 stoichiometry:	1.5X
		Air stoichiometry:	2.0X
		Data acquisition rate:	60 seconds per data sample under constant current scan by step 0.1 A/cm2
		95°C Polarization Conditions
		Cell temperature:	95°C
		Anode humidity:	100% r.h.
		Cathode humidity:	50% r.h.
		H2 back pressure:	30 psig (300 kPa absolute)
		Air back pressure:	30 psig (300 kPa absolute)
		2°C Polarization Conditions
		Environment temperature (cell endplates):	2°C
		Anode humidity:	dry H2 (0% r.h.)
		Cathode humidity:	dry air (0% r.h.)
		H2 back pressure:	7 psig (150 kPa absolute)
		Air back pressure:	7 psig (150 kPa absolute)