M4-NUWC Overview Fontaine.pdf
M4-NUWC Overview Fontaine.pdf M4-NUWC Overview Fontaine.pdf
Reaction Chemistries: Oxidation / Reduction of H 2 5a. BH 4 - Decomposition BH 4 - + 2H2O � BO 2 - + 4H 2 5b. H 2 O 2 Decomposition 2H2O2 � O 2 + 2H2O O 2 via decomposition 5c. H 2 /O 2 Electro-Oxidation/reduction (acid environment) Anode 2H 2 Cathode O 2 � + 4H + 4H + Overall 2H 2 + O 2 � + 4e - + 4e - � 2H2O 0.00 V 1.23 V 2H 2 O 1.23 V This chemistry would support a Proton Exchange Fuel Cell (PEMFC)
• • • Direct Borohydride System Background Objective: investigate and develop a liquid refuelable DBFC ONR 332 sponsored program Collaborative effort between Dstl and NUWC to increase the understanding and science of the DBFC Parallel approaches taken in demonstrator development O2 Dstl – – • MEA topology with indirect O2 reduction NUWC • • Cell topology based – – – – Electrodeposited Pd/Ir anode Electrodeposited Pd/Ir cathode Cation exchange membrane DuPont N115 Direct reduction and oxidation of H2O2 PEM H 2 and NaBH 4 DBH/HPFC 25% NaBH 4 60% H2O2 Solution waste
- Page 1 and 2: Advanced Unmanned Undersea Vehicle
- Page 3 and 4: • Joint / Coalition Battlespace M
- Page 5 and 6: Science and Technology for: Shock A
- Page 7 and 8: • • Propulsion and Energy Thrus
- Page 9 and 10: Advanced Air-Independent Energy Sol
- Page 11 and 12: • • • Fuel Flexibility - - -
- Page 13 and 14: SOFC Stack Test Stand Versa Power S
- Page 15 and 16: Fuel Processing (Reformers) Catalyt
- Page 17 and 18: • • 30-Cell NUWC SOFC Lab Syste
- Page 19 and 20: • • • • In house Laboratory
- Page 21 and 22: Carbide / Hydride Fuel System CaC 2
- Page 23 and 24: • • • Summary of SOFC Effort
- Page 25 and 26: • • • NaBH 4 Objective: - / H
- Page 27: Oxidation of BH 4 - Anode BH 4 - Re
- Page 31 and 32: energy density (Wh/kg) 340 320 300
- Page 33 and 34: single cell potential (V) 1.80 1.60
- Page 35 and 36: Li - Lithium-Seawater Battery Devel
- Page 37 and 38: A outlet Electrolyte Flow Reference
- Page 39 and 40: APPROACH • • • • • Fuel H
- Page 41 and 42: ONR Sponsors: • • Dr. Michele A
•<br />
•<br />
•<br />
Direct Borohydride System<br />
Background<br />
Objective: investigate and develop a liquid refuelable DBFC<br />
ONR 332 sponsored program<br />
Collaborative effort between Dstl and <strong>NUWC</strong> to<br />
increase the understanding and science of the DBFC<br />
Parallel approaches taken in demonstrator<br />
development<br />
O2 Dstl<br />
–<br />
–<br />
•<br />
MEA topology with indirect O2 reduction<br />
<strong>NUWC</strong><br />
•<br />
•<br />
Cell topology based<br />
–<br />
–<br />
–<br />
–<br />
Electrodeposited Pd/Ir anode<br />
Electrodeposited Pd/Ir cathode<br />
Cation exchange membrane<br />
DuPont N115<br />
Direct reduction and oxidation of H2O2 PEM<br />
H 2<br />
and NaBH 4<br />
DBH/HPFC<br />
25%<br />
NaBH 4<br />
60%<br />
H2O2 Solution<br />
waste
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