Sodium-Modulated, AMTEC Electrode Deposition

Award Information
Agency: National Aeronautics and Space Administration
Branch: N/A
Contract: N/A
Agency Tracking Number: 22632
Amount: $69,872.00
Phase: Phase I
Program: SBIR
Awards Year: 1994
Solicitation Year: N/A
Solicitation Topic Code: N/A
Solicitation Number: N/A
Small Business Information
Advanced Modular Power Systems
4667 Freedom Drive, Ann Arbor, MI, 48108
DUNS: N/A
HUBZone Owned: N
Woman Owned: N
Socially and Economically Disadvantaged: N
Principal Investigator
 Robert C. Svedberg
 (313) 677-4260
Business Contact
Phone: () -
Research Institution
N/A
Abstract
A key component in the Alkali Metal Thermal to Electric Converter (AMTEC) is the electrode that is generally sputter deposited on the beta"-alumina solid electrolyte (BASE). Electrode deposition, as it is now practiced however, is a random process that covers active sites on the BASE and places many electrode pore openings at inactive sites. This proposal describes a novel fabrication process for improving electrode components of AMTEC cells. Exchange current densities will be increased by 500% at the BASE/electrode interface by selectively exposing all of the active sodium sites to the 3-phase electrode-BASE-sodium vapor boundary. The new process will selectively deposit the electrode only on the inactive sites of the BASE using the charge sensitive properties of the BASE to control where the electrode is deposited. This leaves the active sites of the BASE conduction plane at the electrode edges. This process will use the common electrode materials, Mo, W(Rh,Pt) and/or TiN. If successful, this process can increase the power output of an AMTEC cell by 50% without increasing the size or weight

* information listed above is at the time of submission.

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