INFLUENCE OF CARBON-BLACK TYPE ON ANODE AND CATHODE ELECTRICAL-PROPERTIES IN LI/SOCL2 BATTERIES

The purpose of the work was to find the dependence of physical and electrical properties of Li/SOCl2 cathodes on the type of carbon blacks used in cathode preparation. Additionally, we tried to evaluate the possible influence of the carbon black type on anode electrical properties. The separate investigation of Cathode and anode electrical properties could be realised by implementing a reference lithium electrode into the Li/SOCl2 batteries under investigation. It is shown that at low frequencies (below 100 Hz) the reference electrode may serve as a relevant tool for distinguishing between the cathode and anode electrical behaviour. Before battery discharge the electrical properties of both electrodes were studied using the impedance spectroscopy as a non-destructive method, while during the discharge the potential drop on each electrode was monitored as a function of time and current. The distribution and composition of discharge products was studied using SEM/EDS analysis.