Negative electrode

Claim 1

A PROCESS FOR PRODUCING NEGATIVE ELECTRODES FOR SECONDARY BATTERIES WHICH COMPRISES: PREPARING AN INTIMATE MIXTURE CONSISTING OF AT LEAST ONE FINELY DIVIDED CHEMICALLY ACTIVE MATERIAL SELECTED FROM THE GROUP CONSISTING OF CADMIUM OXIDE AND IRON OXIDE AND AT LEAST ONE FINELY DIVIDED ELECTRICALLY CONDUCTIVE MATERIAL SELECTED FROM THE GROUP CONSISTING OF CADMIUM, IRON, NICKEL, SILVER AND CARBON, DISSOLVING AN ORGANIC BINDER IN A VOLATILE ORGANIC LIQUID, DISPERSING THE INTIMATER MIXTURE IN SAID DISSOLVED BINDER TO FORM A SLURRY WHEREIN THE PROPORTIONS OF BINDER TO MIXTURE ARE BETWEEN 1% AND 4% OF BINDER FOR EACH 99% TO 96% OF MIXTURE THE AMOUNT OF SAID BINDER BEING INSUFFICIENT TO COMPLETELY COAT THE PARTICLES OF FINELY DIVIDED CHEMICALLY ACTIVE AND ELECTRICALLY CONDUCTIVE MATERIALS IN SAID MIXTURE, DEPOSITING A THIN LAYER OF SAID SLURRY ON A FORAMINOUS METALLIC SUPPORTING MEMBER, REMOVING THE VOLATILE ORGANIC LIQUID PRESENT FROM SAID LAYER, BY DRYING SAID LAYER IN AIR, THEREBY DEPOSITING AN INTIMATE MIXTURE OF BINDER AND FINELY DIVIDED CHEMICALLY ACTIVE AND ELECTRICALLY CONDUCTIVE MATERIALS AS A POROUS LAYER ON SAID METALLIC SUPPORTING MEMBER, COATING THE ARTICLE RESULTING AFTER REMOVAL OF THE VOLATILE ORGANIC LIQUID WITH ADDITIONAL AMOUNTS OF SAID SLURRY, AIR DRYING THE COATING TO REMOVE THE VOLATILE ORGANIC LIQUID THEREFROM, AND REPEATING SAID SUCCESSIVE ADDITIONAL COATING AND AIR DRYING UNTIL THE DESIRED WEIGHT OF COATING HAS BEEN DEPOSITED ON SAID METALLIC SUPPORT, AND THEREAFTER COMPRESSING SAID POROUS LAYER AN AMOUNT SUFFICIENT TO SUBSTANTIALLY DIMINISH THE THICKNESS OF SAID POROUS LAYER WHILE RETAINING THE PORE STRUCTURE OBTAINED BY BUILDING UP THE ELECTRODE THROUGH REPEATED APPLICATIONS OF SAID SLURRY.