Post on 25-Jul-2020
Power-MEE
Increasing Lifetime and Power Density of PEMWEs by High
Performance Membrane Electrode Assemblies
Richard Hanke-Rauschenbach
Leibniz Universität Hannover, Institute for Electric Power Systems
on behalf of the Power-MEE consortium
Spokesperson/contact: Simon Thiele, si.thiele(at)fz-juelich.de
Outline
Introduction to the Power-MEE project
Highlights
Conclusion & Outlook
2POWER-MEE: Novel concepts and components for high performance MEAs for PEM water electrolysis
Project Idea of Power-MEE
3
How can we improve conversion efficiency?
How can we understand and prevent ageing?
How can can we improve current materials?
State of the art Power-MEE
POWER-MEE: Novel concepts and components for high performance MEAs for PEM water electrolysis
Origin of POWER-MEE idea:
Direct Membrane Deposition (DMD) for PEM Fuel Cells
4
Catalyst coated membrane (CCM)
Direct membrane deposition (DMD)
Fabrication methods
Inkjet-Printing1 ✓
Spray-coating2 ✓
Drop-casting3 ✓
[1] Klingele et al., Journal of Materials Chemistry A 3.21 (2015): 11239-11245
[2] Klingele et al., Electrochemistry Communications (2016), 70, 65-68
[3] Wehkamp et al., RSC Advances 6.29 (2016): 24261-24266
membrane
catalyst layer
gas diffusion layer
POWER-MEE: Novel concepts and components for high performance MEAs for PEM water electrolysis
Origin of POWER-MEE idea:
Direct Membrane Deposition (DMD) for PEM Fuel Cells
5
0.5/0.5 mgPt/cm², H2/O2, 0.5/0.5 l/min; 70 °C, 100 % RH, 300/300 kPaabs
Klingele et al., Journal of Materials Chemistry A 3.21 (2015): 11239-11245.
H2/O2, 0.25/0.5 l/min, 80 °C, 95 % RH, atmospheric
pressure
Gore select (15 µm)
POWER-MEE: Novel concepts and components for high performance MEAs for PEM water electrolysis
POWER-MEE: Overall Aim and Project Team
6
Investigate and develop high performance MEAs
for PEM electrolysis
Novel membrane materials (U Stuttgart/ICVT)
Novel membrane manufacturing processes
(U Freiburg/IMTEK)
GDE catalyst layer manufacturing (Hahn-
Schickard)
Tomographic reconstruction and modeling
(U Hannover, U Freiburg/IMTEK)
Ageing protocols and testing (Fraunhofer ISE)
POWER-MEE: Novel concepts and components for high performance MEAs for PEM water electrolysis
Outline
Introduction to the Power-MEE project
Highlights
Conclusion & Outlook
7POWER-MEE: Novel concepts and components for high performance MEAs for PEM water electrolysis
Novel catalyst layer manufacturing methods:
Spray-coating of IrO2 on Ti-powder and fiber sinters
8
Goals for electrode manufacturing
PTE based approach
Optimum low-loading layers
Changing electrode morphology
Final design of the DMD electrodes in POWER-MEE.
PEM
IrO2-Catalyst
Titanium
Carbon
Pt-Catalyst
PEM
Anode
Cathode
POWER-MEE: Novel concepts and components for high performance MEAs for PEM water electrolysis
Novel catalyst layer manufacturing methods:
Spray-coating of IrO2 on Ti-powder and fiber sinters
9
100 µm
IrO2
Ti-PTL
100 µm
Goal: a porous transport electrode with small/no holes to deposit the membrane on top
Porous transport layers: powder sinter (left) and fiber sinter (right)
POWER-MEE: Novel concepts and components for high performance MEAs for PEM water electrolysis
Novel catalyst layer manufacturing methods:
Spray-coating of IrO2 on Ti-powder and fiber sinters
Our PTEs have only 1.5 mg/cm2 IrO2 compared to 2 mg/cm2 IrO2 in commercial benchmarks
0 400 800 1200 1600 2000 2400 2800 3200
1,2
1,4
1,6
1,8
2,0
2,2
U in
V
I in mA/cm2
HFR free
0 400 800 1200 1600 2000 2400 2800 3200
1,2
1,4
1,6
1,8
U in
V
I in mA/cm2
80°C, 1 bar 80°C, 1 bar
Commercial benchmark
Novel approach - advanced
Standardlayer IrO2
Novel approach
Commercial benchmark
Novel approach - advanced
Novel approach
PTEs: 1.5 mg/cm2 IrO2 PTEs: 1.5 mg/cm2 IrO2
Fiber sinter substrates Fiber sinter substrates
Standardlayer IrO2
POWER-MEE: Novel concepts and components for high performance MEAs for PEM water electrolysis 10
POWER-MEE: Novel concepts and components for high performance MEAs for PEM water electrolysis 11
N212
N115
N212
N115+ Pt + Nafion
N117
~ 180 µm
Sandwich
~ 180 µm
Pt Interlayer
~ 200 µm
N212N212
Novel membrane manufacturing processes:
Direct membrane deposition composite membranes
Tomographic reconstruction of catalyst layers:
FIB-SEM tomographic procedure
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FuelCellsEtc
EZ-CCM
POWER-MEE: Novel concepts and components for high performance MEAs for PEM water electrolysis
Modeling support of material development
FuelCellsEtc EZ CCM
Anode catayst IrRuOx (unsupported)
Anode Loading 3 mg/cm²
Resolution 20 nm
Field of view 29 µm x 24 µm x 7 µm
POWER-MEE: Novel concepts and components for high performance MEAs for PEM water electrolysis
Modeling support of material development
14
Usable for investigation of
• Degradation
• Manufacturing Process
POWER-MEE: Novel concepts and components for high performance MEAs for PEM water electrolysis
Modeling support of material development
15POWER-MEE: Novel concepts and components for high performance MEAs for PEM water electrolysis
Outline
Introduction to the Power-MEE project
Highlights
Conclusion & Outlook
16POWER-MEE: Novel concepts and components for high performance MEAs for PEM water electrolysis
POWER-MEE: Overall Aim and Project Team
Investigate and develop high performance MEAs for
PEM electrolysis
Novel membrane materials (U Stuttgart/ICVT)
Novel membrane manufacturing processes
(U Freiburg/IMTEK)
GDE catalyst layer manufacturing (Hahn-
Schickard)
Tomographic reconstruction and modeling
(U Hannover, U Freiburg/IMTEK)
Ageing protocols and testing (Fraunhofer ISE)
Interested in testing our materials?
Interested in a collaboration? Pleas contact us!
POWER-MEE: Novel concepts and components for high performance MEAs for PEM water electrolysis
Power-MEE
Increasing Lifetime and Power Density of PEMWEs by High
Performance Membrane Electrode Assemblies
Richard Hanke-Rauschenbach
Leibniz Universität Hannover, Institute for Electric Power Systems
on behalf of the Power-MEE consortium
Spokesperson/contact: Simon Thiele, si.thiele(at)fz-juelich.de
THANK YOU FOR YOUR INTEREST!