Objective A major issue of electrolyte investigation is the development of electrolytes showing specific conductivity, even at high concentrations. Electrolytes with high concentrations are required for cells with positive polymer electrodes, where an exchange of anions between electrolyte and electrode is involved in the polymer's redox reaction. Common electrolytes like Li Cl O4- propylene carbonate (PC) exhibit maximum molarities of 3 mole/ kg and maximum conductivity of 4 Ms/cm. New electrolytes with maximum concentrations up to 13 mole/kg and maximum conductivity up to 33 Ms/cm were found.First experiments on positive electrode materials showed that polyaniline, synthesized by common methods, is a promising candidate. These materials show superior, specific capacities of more than 100 Ah/kg over more than 100 cycles.It was found that polyanilines prepared by common methods have extremely high contents of carcinogenic benzidine as an undesirable side product. As a result of this observation, further work concentrated on developing polyanilines with tolerable benzidine content. These new polyanlile types have acceptable benzidine contents - less than 100 parts per million. but this material does not show sufficient specific capacities to allow application.Continued development of alternative redox polymers produced polymers with good electro-activities but poor specific capacities (less than 30 Ah/kg) and poor cycle lives, but with possibilities for being processed easily into various battery forms.Considerable attention was also focused on developing suitable negative counter electrodes and electrolytes. The cycling efficiency and specific capacity of these components strongly affect the energy density of the target cell.As a result of the negative electrode development, a thin layer of lithium aluminium electrodes was obtained, showing superior cycle life (over 500 cycles) and a capacity of 380 Ah/kg.IT HAS BEEN DEMONSTRATED THAT ELECTRICALLY CONDUCTING POLYMER MATERIALS CAN BE USED PRINCIPALLY FOR ELECTRODES OF RECHARGEABLE BATTERIES.HOWEVER, VERY LITTLE KNOWLEDGE IS AVAILABLE ON THE DETERIORATION REACTIONS OF POLYMER ELECTRODES DURING CYCLING AND SELF DISCHARGE. THE DEVELOPMENT OF AN APPROPRIATE ELECTRODE STRUCTURE IS STILL IN A PRIMITIVE STAGE.THE OBJECTIVE OF THE PROGRAMME IS TO DEVELOP PROTOTYPE RECHARGEABLE CELLS USING IN A FIRST STEP POLYMERS ALREADY EXISTING AND, IN A SECOND STAGE, NEW POLYMERS TO SERVE AS ELECTRODE MATERIALS WITH A HIGHER ENERGY DENSITY THAN PRESENT SYSTEMS. Fields of science natural scienceschemical sciencesorganic chemistryorganic reactionsnatural scienceschemical sciencesinorganic chemistryalkali metalsnatural scienceschemical sciencesinorganic chemistryinorganic compoundsnatural scienceschemical sciencespolymer sciencesnatural scienceschemical sciencesinorganic chemistrypost-transition metals Programme(s) FP1-BRITE - Multiannual research and development programme (EEC) in the fields of basic technological research and the applications of new technologies (BRITE), 1985-1988 Topic(s) Data not available Call for proposal Data not available Funding Scheme CSC - Cost-sharing contracts Coordinator Commissariat à l'Energie Atomique (CEA) EU contribution No data Address Centre d'Études de Grenoble Avenue des Martyrs 38041 Grenoble France See on map Total cost No data Participants (3) Sort alphabetically Sort by EU Contribution Expand all Collapse all BASF AG Germany EU contribution No data Address Carl-Bosch-Straße 38 67063 Ludwigshafen See on map Total cost No data National Institute for Higher Education-Dublin Ireland EU contribution No data Address Glasnevin 9 Dublin See on map Total cost No data Varta Batterie AG Germany EU contribution No data Address Gundelhardtstraße 72 65779 Kelkheim See on map Total cost No data
