Year: 1981
Type: article
Abstract: In order to predict heat generation rates during the charge and discharge of the Li/Al/FeS battery, it is necessary to quantify the thermodynamics of the system. The direct measurement of the open circuit potential as a function of temperature provides the most convenient method for the determination of the free energy, enthalpy and entropy changes of the reaction. The entropic contribution defines the intrinsic heat generation during operation of the cell. Reproducible variations of the cell potential with temperature have been measured using an iron wire electrode previously anodized at 1.55V vs . Li/Al in a lithium-sulfide- containing LiCl/KCl eutectic melt. The observed temperature coefficient of the EMF is in reasonable agreement with that determined for a Gould 178Ah cell which had been maintained at 500°C for 12 hours. Calculations of the predicted temperature excursions of the 178Ah cell during a 60mA/cm 2 discharge indicate only a 30°C temperature increase to the 1V cut-off potential.
Source: ECS Proceedings Volumes
Author: J. Phillips
Language: English
Subfield: Fluid Flow and Transfer Processes
Field: Chemical Engineering
Domain: Physical Sciences
Open Access status: diamond
OpenAlex ID: W2912673095