LITHIUM-CHLORINE ELECTROCHEMICAL ENERGY STORAGE SYSTEM
Interim technical rept., 13 Dec 1965-13 Jun 1966
GENERAL MOTORS CORP INDIANAPOLIS IN ALLISON GAS TURBINE DIV
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The objective of the program is to obtain suitable laboratory data to determine the feasibility of a lithium-chlorine electrically rechargeable electrochemical energy storage system for vehicle propulsion. Various methods for increasing the electrochemical charge rate were investigated. At high charging current densities, the cell efficiency was found to drop significantly due to polarization of the Cl2 electrode. Experimental investigations determined that both geometry and material selection are important in the electrode design and that reverse pulsing enhances the electrode performance, allowing higher charging current density. A laboratory test cell using Li and Cl2 as reactants was fabricated to evaluate methods for increasing the electrochemical charge rate. An electrical short terminated the first cell test before meaningful data could be obtained. The required design modifications to eliminate this problem are being incorporated into the design. System analytical studies were conducted on two cell concepts. The first was an advanced concept of the Mark IV experimental cell currently being tested. The second was a cylindrical cell design using vertical electrodes. The latter cell was selected as the most advantageous and was developed into a replaceable ten- module engine system to meet the ERDL duty cycle requirements. The system is estimated to weigh 1250 lb and provide 200 kw-hr of energy. System analysis and trade-off studies on a fast charge system concept are in progress. Experimental investigations were initiated to determine the feasibility of Cl2 adsorption on charcoal.
- Electrochemical Energy Storage
- Electric and Ion Propulsion