MoZEES RA2 Hydrogen Components & T echnologies Magnus - - PowerPoint PPT Presentation

MoZEES RA2

Hydrogen Components & T echnologies

Magnus Thomassen

Research Manager SINTEF RA2 leader

• Anders Ødegård, Katie McCay, SINTEF
• Ragnhild Hancke, IFE

Hydrogen Components & T echnologies

• Objectives:

– Contribute to reaching the 2025 targets (EU & DOE) for hydrogen production, storage and fuel cells for the transport sector. – Improve understanding of degradation/lifetime phenomena to improve durability and performance – Lower cost and higher efficency of fuel cells and electrolysers

• Focus Areas:

– Reduced materials and operating costs as well as increased manufacturability of components – Maritime applications, rules, regulations and maritime environments.

RA2 Research Tasks

• Task 2.1 – High performance catalysts
• Task 2.2 – Low cost bipolar plates
• Task 2.3 – Low cost, high performance membranes
• Task 2.4 – Lifetime, durability and performance
• Task 2.5 – Hydrogen storage tanks

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0.5 A/cm2 2.5 A/cm2

Further image processing is necessary to yield quantified images and enable a careful study of water/gas distribution in the porous layers

• Corrections for neutron scattering based on black

body measurments

• Beer-Lambert’s law to go from the relative

attenuation to the quantified image: 𝑒 = −

1 Σ 𝑚𝑜 𝐽 𝐽0 .

Task 2.4 In-plane Neutron Imaging of PEM Water Electrolysis Cell

Task 2.2 – Low cost bipolar plates

• Objective:

– Low cost coating materials and processes, e.g. composite coatings with conductive metals, graphite or oxides for fuel cells and electrolyzers.

• Research Method:

– Establish robust and scalable deposition/coating methods based on materials developed within the centre. – Evaluate performance and durability of coatings ex and in situ. – Post-mortem analysis of effluents and corrosion products – Testing single cells and short stacks with bipolar plates using infrastructure in the Norwegian FCH Center

Polarisation curves of Powercell S2 stack measured by SINTEF at the NFCH

Fuel cell loss break down

https://doi.org/10.1016/j.jpowsour.2017.01.059

PEM Fuel cell single cell

Batch coating equipment Inline coating equipment

Teer Coatings’ Technology

Batch and inline coating equipment, capable of depositing coatings on bipolar plates.

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ICR Cathode BPP

On-line ICR method

On-line ICR method

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Gold coated vs uncoated – online ICR

• Uncoated ~18 mohm cm2
• Gold ~2 mohm cm2
• ~ 5% Fuel Cell efficiency

increase.

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In situ contact resistances of cells using gold coated and uncoated stainless steel bipolar plates during polarisation curve.

Long Term In-situ BPP Testing

• BPPs from Teer Coatings

– Carbon coated SS316 steel

• Testing protocol:

– Initially:

• Impedance, polarisation curve, humidity and

temperature cycle – Drive Cycles

• Sets of 50, followed by a polarisation curve and EIS
• Each set of 50 drive cycles takes 17 hours
• After 500 cycles, cell is shut down, recovery protocol
• Total of 6 000 cycles will be performed
• Total test period > 85 days

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A single drive cycle and a standard voltage response The single cell mounted on a test station

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Performance recovery after shut down

Ongoing Performance – Polarisation Curves

Ongoing Performance - EIS

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Conclusions and outlook

• In-situ measurement contact resistance technique well established

– Accelerated test protocols

• New coatings developed by MoZEES user partner showing good initial performance
• Results will be analysed together with ex-situ characterization of BPP at EoT.
• Methodology ready for further tests of new coating solutions
• Potential for expansion to PEM electrolyser cells

Thank you for your attention