fuel cell characterization
TRANSCRIPT
![Page 1: Fuel Cell Characterization](https://reader030.vdocuments.site/reader030/viewer/2022013015/61cfb468190e360aea5e127b/html5/thumbnails/1.jpg)
Fuel Cell Characterization
![Page 2: Fuel Cell Characterization](https://reader030.vdocuments.site/reader030/viewer/2022013015/61cfb468190e360aea5e127b/html5/thumbnails/2.jpg)
What Do We Want To Know?
![Page 3: Fuel Cell Characterization](https://reader030.vdocuments.site/reader030/viewer/2022013015/61cfb468190e360aea5e127b/html5/thumbnails/3.jpg)
In situ Characterization
![Page 4: Fuel Cell Characterization](https://reader030.vdocuments.site/reader030/viewer/2022013015/61cfb468190e360aea5e127b/html5/thumbnails/4.jpg)
Ex situ Characterization
![Page 5: Fuel Cell Characterization](https://reader030.vdocuments.site/reader030/viewer/2022013015/61cfb468190e360aea5e127b/html5/thumbnails/5.jpg)
Test Setup
![Page 6: Fuel Cell Characterization](https://reader030.vdocuments.site/reader030/viewer/2022013015/61cfb468190e360aea5e127b/html5/thumbnails/6.jpg)
SOFC Test Setup
![Page 7: Fuel Cell Characterization](https://reader030.vdocuments.site/reader030/viewer/2022013015/61cfb468190e360aea5e127b/html5/thumbnails/7.jpg)
Current Voltage Measurement
• Galvanostat/Potentiostat system
• Steady state
• Test condition– Warm-up
– Temperature
– Flow rate (stoichiometric number)
– Compression force
![Page 8: Fuel Cell Characterization](https://reader030.vdocuments.site/reader030/viewer/2022013015/61cfb468190e360aea5e127b/html5/thumbnails/8.jpg)
Polarization Curve
![Page 9: Fuel Cell Characterization](https://reader030.vdocuments.site/reader030/viewer/2022013015/61cfb468190e360aea5e127b/html5/thumbnails/9.jpg)
Electrochemical Impedance Spectroscopy
![Page 10: Fuel Cell Characterization](https://reader030.vdocuments.site/reader030/viewer/2022013015/61cfb468190e360aea5e127b/html5/thumbnails/10.jpg)
Electrochemical Impedance Spectroscopy
![Page 11: Fuel Cell Characterization](https://reader030.vdocuments.site/reader030/viewer/2022013015/61cfb468190e360aea5e127b/html5/thumbnails/11.jpg)
Electrochemical Impedance Spectroscopy
![Page 12: Fuel Cell Characterization](https://reader030.vdocuments.site/reader030/viewer/2022013015/61cfb468190e360aea5e127b/html5/thumbnails/12.jpg)
Resistor
![Page 13: Fuel Cell Characterization](https://reader030.vdocuments.site/reader030/viewer/2022013015/61cfb468190e360aea5e127b/html5/thumbnails/13.jpg)
Resistor/Capacitor
![Page 14: Fuel Cell Characterization](https://reader030.vdocuments.site/reader030/viewer/2022013015/61cfb468190e360aea5e127b/html5/thumbnails/14.jpg)
Resistor/Capacitor
![Page 15: Fuel Cell Characterization](https://reader030.vdocuments.site/reader030/viewer/2022013015/61cfb468190e360aea5e127b/html5/thumbnails/15.jpg)
Resistor/Capacitor
![Page 16: Fuel Cell Characterization](https://reader030.vdocuments.site/reader030/viewer/2022013015/61cfb468190e360aea5e127b/html5/thumbnails/16.jpg)
Infinite Warburg (Infinite Thickness)
Fuel cell electrode has a finite thickness
![Page 17: Fuel Cell Characterization](https://reader030.vdocuments.site/reader030/viewer/2022013015/61cfb468190e360aea5e127b/html5/thumbnails/17.jpg)
Finite Warburg (Finite Thickness)
![Page 18: Fuel Cell Characterization](https://reader030.vdocuments.site/reader030/viewer/2022013015/61cfb468190e360aea5e127b/html5/thumbnails/18.jpg)
Electrochemical Elements
![Page 19: Fuel Cell Characterization](https://reader030.vdocuments.site/reader030/viewer/2022013015/61cfb468190e360aea5e127b/html5/thumbnails/19.jpg)
Simple Equivalent Circuit
![Page 20: Fuel Cell Characterization](https://reader030.vdocuments.site/reader030/viewer/2022013015/61cfb468190e360aea5e127b/html5/thumbnails/20.jpg)
Anode vs Cathode
![Page 21: Fuel Cell Characterization](https://reader030.vdocuments.site/reader030/viewer/2022013015/61cfb468190e360aea5e127b/html5/thumbnails/21.jpg)
EIS vs Current Density
![Page 22: Fuel Cell Characterization](https://reader030.vdocuments.site/reader030/viewer/2022013015/61cfb468190e360aea5e127b/html5/thumbnails/22.jpg)
Example: Fuel Composition Effect (SOFC)
Under pure oxygen of high stoichiometry
![Page 23: Fuel Cell Characterization](https://reader030.vdocuments.site/reader030/viewer/2022013015/61cfb468190e360aea5e127b/html5/thumbnails/23.jpg)
Reference Electrode
Nernst Potential
Cel
l Vol
tage
(V)
jCurrent Density (A/cm2)
VFC
ηc,act+conc
ηa,act+conc=VREF
ηohm
ElectrodeElectrolyteElectrode R.E.VFC
VREF
![Page 24: Fuel Cell Characterization](https://reader030.vdocuments.site/reader030/viewer/2022013015/61cfb468190e360aea5e127b/html5/thumbnails/24.jpg)
Activation Overvoltage of DMFC (Anode vs Cathode)
![Page 25: Fuel Cell Characterization](https://reader030.vdocuments.site/reader030/viewer/2022013015/61cfb468190e360aea5e127b/html5/thumbnails/25.jpg)
Current Interruption Method
![Page 26: Fuel Cell Characterization](https://reader030.vdocuments.site/reader030/viewer/2022013015/61cfb468190e360aea5e127b/html5/thumbnails/26.jpg)
Current Interruption Method
![Page 27: Fuel Cell Characterization](https://reader030.vdocuments.site/reader030/viewer/2022013015/61cfb468190e360aea5e127b/html5/thumbnails/27.jpg)
Cyclic Voltametry
![Page 28: Fuel Cell Characterization](https://reader030.vdocuments.site/reader030/viewer/2022013015/61cfb468190e360aea5e127b/html5/thumbnails/28.jpg)
• Porosity
– Mercury porosimetry: effective porosity
• Surface area: B.E.T. method
• Permeability
• SEM, TEM, AFM, XRD, XPS, FTIR, AES, SIMS, NMR…
Ex Situ Measurements