Relaxation-phenomena in LiA1/FeS-cells
A theoretical model of the capacity of strongly relaxing electrochemical systems is applied to the LiA1/FeS system. Relaxation phenomena in LiA1 and FeS electrodes can be described by this model. Experimental relaxation data indicate that lithium transport through the ..cap alpha..-LiA1 layer to the particle surface is the capacity limiting process at high discharge current density in the LiA1 electrode in LiC1-KC1 and LiF-LiC1-LiBr mixtures. Strong relaxation is observed in the FeS electrode with the LiC1KC1 electrolyte caused by lithium concentration gradients and precipitation of KC1 in the pores. Experimental and theoretical work on electrodes and cells of the LiA1/FeS system in the past has shown the importance of relaxation processes during charge and discharge in both electrodes. The results of potential relaxation measurements indicated strong relaxation phenomena in FeS and LiA1 electrodes during discharge but no relationship between current profile and usable capacity can be established by this method. Kappus and Hullmeine developed a theory of the capacity of relaxing electrochemical systems which was successfully applied to Pb- and PbO/sub 2/-electrodes. In this work the authors applied the theory to LiA1- and FeS electrodes in LiC1-KC1 and LiF-LiC1-LiBr electrolytes.
- Research Organization:
- VARTA Batterie AG, R and D Center, D-6233 Kelkheim
- OSTI ID:
- 5280822
- Report Number(s):
- CONF-820814-
- Journal Information:
- Proc., Intersoc. Energy Convers. Eng. Conf.; (United States), Journal Name: Proc., Intersoc. Energy Convers. Eng. Conf.; (United States) Vol. 2; ISSN PIECD
- Country of Publication:
- United States
- Language:
- English
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250900* -- Energy Storage-- Batteries
ALKALI METAL COMPOUNDS
ALUMINIUM
BROMIDES
BROMINE COMPOUNDS
CHALCOGENIDES
CHARGE STATE
CHARGED-PARTICLE TRANSPORT
CHEMISTRY
CHLORIDES
CHLORINE COMPOUNDS
DATA
DATA ANALYSIS
ELECTRIC BATTERIES
ELECTRIC DISCHARGES
ELECTROCHEMICAL CELLS
ELECTROCHEMISTRY
ELECTRODES
ELEMENTS
FLUORIDES
FLUORINE COMPOUNDS
HALIDES
HALOGEN COMPOUNDS
INFORMATION
IRON COMPOUNDS
IRON SULFIDES
LEAD
LEAD COMPOUNDS
LEAD OXIDES
LITHIUM BROMIDES
LITHIUM CHLORIDES
LITHIUM COMPOUNDS
LITHIUM FLUORIDES
LITHIUM HALIDES
LITHIUM-SULFUR BATTERIES
METAL-NONMETAL BATTERIES
METALS
NUMERICAL DATA
OXIDES
OXYGEN COMPOUNDS
POTASSIUM CHLORIDES
POTASSIUM COMPOUNDS
RADIATION TRANSPORT
RELAXATION
SULFIDES
SULFUR COMPOUNDS
THEORETICAL DATA
TRANSITION ELEMENT COMPOUNDS