Positive electrode

Claim 1

A PROCESS FOR PRODUCING POSITIVE ELECTRODES FOR SECONDARY BATTERIES WHICH COMPRISES: PREPARING AN ELECTRICALLY CONDUCTIVE POWDERED MATERIAL BY DISPERSING SOLID PARTICLES OF A VERY FINELY DIVIDED ELECTRICALLY CONDUCTIVE MATERIAL IN A SOLUTION OF AN ALKALI-RESISTANT SYNTHETIC POLYMER, THE RELATIVE PROPORTIONS OF ELECTRICALLY CONDUCTIVE MATERIAL AND SYNTHETIC POLYMER BEING BETWEEN 80 TO 20 AND 35 TO 65, BY WEIGHT, CASTING THE DISPERSION INTO A THIN FILM, DRYING THE FILM AT A TEMPERATURE BETWEEN 25*C. AND 180*C. CRUSHING THE DRIED FILM TO YIELD PARTIELES OF ELECTRICALLY CONDUCTIVE POWDER, MIXING THE RESULTING PARTICLES OF ELECTRICALLY CONDUCTIVE POWDER WITH A SOLUTION OF A DISSOLVED METALLIC SALT IN SUFFICIENT AMOUNT TO COAT THE SURFACE OF SAID PARTICLES, ADDING A SOLUTION OF AN ALKALI TO SAID MIXTURE TO EFFFECT PRECIPITATION OF A HYDROXIDE OF THE METAL OF THE DISSOLVED METALLIC SALT ON THE SURFACES OF SAID POWDER PARTICLES, THE RATIO OF HYDROXIDE TO PARTICLES BEING BETWEEN 1:4 AND 4:1, BY WEIGHT, RISING THE RESULTING SOLID PRODUCTS, DRYING THE RINSED PRODUCT AT A TEMPERATURE BETWEEN 25*C. AND 100*C.,FORMING A NON-AQUEOUS SLURRY BY CRUSHING THE RINSED PRODUCT AND DISPERSING THE SAME AS FINELY DIVIDED SOLIDS IN AN INERT VOLATILE ORGANIC LIQUID MEDIUM, IN WHICH THE DISPERSED PARTICLES ARE NOT SOLUBLE, APPLYING A LAYER OF THE SLURRY TO A METALLIC SUPPORT BY DIPPING THE SUPPORT INTO A BODY OF SLURRY AND WITHDRAWING THE SUPPORT AND ADHERING LAYER OF SLURRY THEREFROM, EVAPORATING THE LIQUID PRESENT IN SAID LAYER, THEREBY LEAVING BEHIND A POROUS DEPOSIT COMPRISING AN INTIMATE MIXTURE OF PRECIPITATED HYDROXIDE AND POLYMER PARTICLES BEARING A COATING OF ELECTRICALLY CONDUCTIVE MATERIAL, COMPACTING THE RESULTING POROUS PLATE PRODUCT TO DIMINISH THE POROSITY AND THICKNESS THEREOF AND TO PRODUCE A FLEXIBLE POSITIVE ELECTRODE, THE TOTAL AMOUNT OF COMPACTING CORRESPONDING TO A REDUCTION IN THICKNESS OF BETWEEN 25% AND 75%, AND THE COMPACTING BEING PERFORMED WITH THE PLATE AT A TEMPERATURE BETWEEN ABOUT 25* AND 120*C.