1 / 27

Alkaline Methanol Fuel Cell

Alkaline Methanol Fuel Cell. Tam Duong Dr. Yushan Yan. Fuel Cell. Electrochemical device Convert chemical energy into electricity Having two electrodes: Positive (cathode) and Negative (anode) Reaction with the presence of electrolyte. Working depends on the catalyst. System.

ima-rosales
Download Presentation

Alkaline Methanol Fuel Cell

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Alkaline Methanol Fuel Cell Tam Duong Dr. Yushan Yan

  2. Fuel Cell • Electrochemical device • Convert chemical energy into electricity • Having two electrodes: Positive (cathode) and Negative (anode) • Reaction with the presence of electrolyte. • Working depends on the catalyst

  3. System Cell system with rotating disk, reference electrode, platinum wire, and gas vent.

  4. Why Methanol Fuel Cell? • Methanol has high energy density. • Easy to store in liquid state in room temperature. • Fuel cell works as a battery that doesn’t go down or need to be charged. • Highly promising to serve as a power source for cell phones, and laptops. • Reduce the pollution

  5. Current Methanol Fuel Cell • Alkaline Methanol Fuel Cell: Hydroxide flow from cathode to anode. • Waste Products: Water and Carbon Dioxide • Toxic and flammable • In 2005, ICAO (International Civil Avitation Organization) DGP (Dangerous Food Panel) voted to allow passengers to carry and uses micro fuel cell when travelling aboard.

  6. Basic Information • Nafion membrane (ionomer) • Qualified Power (W): 100 kW to 1MW • Working temperature: 90 – 120 deg C • Electrical efficiency: -Cell : 20-30% -System: 10-20% • Typical fuel cell: 0.6 – 0.7 V

  7. Method of Collecting Data • Coating the glassy carbon electrode with the calculated volume of catalyst • Sample Volume = (Electrode Area)*(Loading/Area)*(Solution Concentration) • 10 ul of .05% Nafion • Making 250 mL electrolyte (0.1M KOH) • Setting the cell up with Pt wire and the reference electrode • Connecting the gas vent • Blowing gas into the cell and record data

  8. mA Cyclic Voltammetry Oxidation V • One type of potential electrochemical measurement. (Potential scanning) • Forward sweep: reversible oxidation • Reversed sweep: Reduction • Used to calculate the surface area Reduction Basic Shape of a CV curve

  9. Table of Samples and Results

  10. Calculating the Theoretical Surface Area Calculating Experimental Surface Area Area (CV graph) [mA.V] x speed [1/V] x ratio [mC/mA] Constant [mC/cm2] x loading [µg/cm2] x area (electrode) [cm2] x 0.77

  11. ETEK with Nafion (ORR) ORR curve without methanol at 5 mV/s scanning speed ORR curve with methanol at 5 mV/s scanning speed

  12. ETEK with Nafion (HOR and MOR) MOR curve at 50 mV/s scanning speed HOR curve with 300 rpm at 5 mV/s scanning speed

  13. SeNW (ORR)

  14. SeNW (HOR and MOR) HOR curve with 300 rpm at 5 mV/s scanning speed MOR curve at 50 mV/s scanning speed

  15. Gold NanoTube (ORR)

  16. Gold NanoTube (HOR and MOR) HOR with 300 rpm at 5 mV/s MOR at 50 mV/s

  17. Palladium Nanotube Chronoamperometry at -0.15 V vs Hg/HgO ORR with 1600 rpm at 5 mV/s

  18. Palladium Nanotube (HOR and MOR) MOR at 50 mV/s HOR with 300 rpm at 5 mV/s

  19. Silver Nanowire 600 µg (ORR)

  20. Silver Nanowire 600 µg (MOR)

  21. Silver Nanowire (100 µg) ORR with 1600 rpm at 5 mV/s HOR with 300 rpm at 5 mV/s

  22. Silver Nanowire 50ug (ORR)

  23. Silver Nanowire 50ug (HOR and MOR) MOR at 50 mV/s HOR with 300 rpm at 5 mV/s

  24. Palladium and Platinum ORR with 1600 rpm at 5 mV/s Chronoamperometry at -0.15 V vs Hg/HgO

  25. Palladium/Platinum (HOR and MOR) MOR at 50 mV/s HOR with 300 rpm at 5 mV/s

  26. Ag/C (ORR) ORR_Ag/C (50 ug/cm2) ORR_Ag/C (100 ug/cm2)

  27. Conclusion • Platinum nanotube, palladium nanotube work for HOR, MOR, and ORR. • Silver on carbon, silver nanowires, gold nanotube, selenium nanowires work for ORR even with methanol. Future Work • Testing platinum/silver alloy • Making silver nanowires

More Related