Chlorine Electrodes for Molten Salt Batteries

Period of Performance: 01/09/1989 - 01/09/1991

$503K

Phase 2 SBIR

Recipient Firm

Technochem CO.
203-A Creek Ridge Rd.
Greensboro, NC 27406
Principal Investigator

Abstract

FUTURE MILITARY SPACE MISSIONS WILL REQUIRE ELECTROCHEMICAL ENERGY STORAGE DEVICES THAT CAN DELIVER PEAK/PULSE POWER LEVELS OF 100 kW TO 100 MW AND SUSTAINED POWER LEVELS OF 100 kW. THE PHASE I PROGRAM FOCUSED ON THE ACTIVATION OF CHLORINE ELECTRODES FOR LITHIUM-CHLORINE MOLTEN-SALT BATTERIES FOR THESE APPLICATIONS. A NOVEL ELECTROCHEMICAL ACTIVATION TECHNIQUE WAS FOUND TO BE FAR SUPERIOR TO THERMAL ACTIVATION. AN ACTIVATED POROUS GRAPHITE EXHIBITED PERFORMANCE A FACTOR OF THREE BETTER THAN A WELL-KNOWN FUEL CELL-GRADE CARBON. THESE NON-OPTIMIZED ACTIVATED CHLORINE ELECTRODES DELIVERED A REMARKABLE LEVEL OF PULSE-CURRENT PERFORMANCE IN MOLTEN LiCl-KCl. IN PROPERLY ENGINEERED BATTERIES, CURRENT PULSES CORRESPONDING TO 83 W/sq OR 36 kW/kg, ARE POSSIBLE BASED ON THE OBSERVED PERFORMANCE. WITH RECURRING DISCHARGE PULSES AND CHARGE AUGMENTATION, AN ENERGY DENSITY OF 1-10 MJ/kg IS PROJECTED. A PROPOSED PHASE II PROGRAM WILL CONCENTRATE ON DEVELOPING A DEVICE BASED ON OPTIMIZED CHLORINE ELECTRODES AND ACTIVATION TREATMENTS. ASPECTS OF CELL DESIGNS, MATERIALS AND SEALING TECHNIQUES WILL BE EVALUATED AT A MEANINGFUL SCALE.