SOLID STATE BATTERIES WITH CONDUCTING POLYMERS
Résumé
The conducting polymers like (CH)x are very interesting materials for electrodes in electrochemical cells. We have combined such electrodes with solid electrolytes to build "all solid-state" batteries. The first prototypes using a silver anode and a silver conducting electrolyte have been working satisfactorily since two years. The performances have been tested with many batteries to study the electrical properties as well as the thermodynamical parameters. A number of cycles of charge-discharge have been recorded at various values of the current kept constant. This has allowed to determine the essential properties : voltage, current, current density, reliability, Faradaic and energetic efficiency ... The performances have also been investigated as a function of temperature, allowing to derive the enthalpy and the entropy of the electrochemical reaction. The kinetics of the discharge has been thorough-fully measured and compared to the mass transport data recently obtained in our laboratory by using radiotracers. This has given a clear explanation of the mechanism of mass transport inside the polymer.
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Articles anciens
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