M4-NUWC Overview Fontaine.pdf
M4-NUWC Overview Fontaine.pdf
M4-NUWC Overview Fontaine.pdf
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Li –<br />
Lithium-Seawater Battery Development<br />
Charles J. Patrissi, Ph.D. / Christian R. Schumacher, M.S.<br />
seawater battery<br />
Anode: Li Li + + e- Cathode: 2H20 + 2e- Cell: Li + H2O Li +<br />
H 2<br />
+ OH- + ½<br />
+ 2OH -<br />
H 2 (gas)<br />
Theoretical Energy Storage of Li-seawater battery:<br />
8570 Wh / kg of Li<br />
4600 Wh / L of Li<br />
(Al-H 2 O ~ 4380 Wh/kg (Theor.)) (Mg-H 2 O ~ 4120 Wh/kg (Theor.))<br />
<strong>NUWC</strong>DIVNPT<br />
Li anode pouch<br />
Flexible<br />
Pouch<br />
Material<br />
Water proof<br />
electrolyte<br />
Key Enabler: Water proof electrolyte membrane<br />
• Li-ion conductor<br />
• Funding: NAVSEA / ONR<br />
• Ceramic Glass<br />
• Target: low power sensors<br />
Li pouch anode<br />
• FY09<br />
• Fabricated at <strong>NUWC</strong>DIVNPT<br />
– Demonstrate pouch anode in<br />
• Up to 96% coulombic efficiency in seawater (70<br />
the ocean<br />
psig to date)<br />
– Shelf stability<br />
• Low power density<br />
– Cathode development<br />
Seawater battery<br />
– Fundamental studies toward<br />
– High energy density<br />
increased power<br />
– Potentially safer to store than COTS Li – Increased hydrostatic pressure<br />
batteries (no cathode)
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