Innovative automotive MEA Development – implementation of IPHE-GENIE Achievements Targeted at Excellence
The objective of the IMMEDIATE project is to develop a medium temperature PEM membrane electrode assembly (MEA) that will fulfil the OEM requirements with respect to cost, performance and durability and at the same time is a significant step towards the ultimate goal of having a PEM FC able to operate at >100°C at minimal RH, Pt loadings
<0.15 g/kW at >55% efficiency and >5,000 h lifetime at dynamic operation.
The European added value of IMMEDIATE is clear. The five individual industry partners have the following expected impact from the IMMEDIATE project:
- IRD: Expand their MEA portfolio to include automotive MEAs
- Fumatech: Expand their portfolio to include a medium-high temperature membrane
- SGL: Further consolidate their commercial position in the GDL market
- Timcal: Expand their portfolio to include new graphite powders for FCs
- Volvo: Exploit the results as an end-user
Some results may be used as a spin-off in congener technologies.
The prime focus of IMMEDIATE is to develop high performing MEAs aimed at automotive applications through material R&D & process optimisation. The technical targets in IMMEDIATE are addressing the JTI targets for automotive MEAs with respect to performance & cost. The project is a continuation of the terminated and very successful FP6 R&D-project: IPHE-GENIE. The IMMEDIATE project approach is based on utilisation and further improvement of the materials and processes. Thus, the approach and the technical IMMEDIATE targets are as follows:
- Development of MEAs that show high performance [1 W/cm2 @ UCell=0.68V (hEl=55%)] at low Platinum loadings [0.15g Pt/kW] through:
- Development of a membrane with a proton conductivity of at least 0.1 S/cm at 120ºC & 25% RH , a thermal stability up to 160ºC, and low dimensional changes (<10%, wet/dry)
- Catalyst development and design
- Ionomer and membrane optimisation
- Electrode design
- GDL optimisation
- Process optimisation
- Testing of the developed MEAs on single cell and on small stacks level at realistic automotive operating conditions i.e. T=120ºC, RH 25%, P=1.5 bar, yet being able to start from -20°C
- Application of automotive AST protocols to make a 5,000 h’s lifetime probable
It is considered that the combination of these targets is both a challenging and significant step forward.