Electrodes with improved adhesion between activator and collector and methods of making the same

A method for producing an electrode for cell comprising a layer of an electrode-forming substance comprising an electrode activator and a binder coated or bonded to a surface of a collector, wherein the binder is a fluoroplastic grafted with at least one acryl polymer consisting mainly of at least one monomer unit selected from esters of acrylic acid and/or methacrylic acid and that the content of said acryl polymer is 0.1 to 20% by weight of said binder, comprising the steps of:

• (a) obtaining the binder by graft reaction of the acrylic polymer(s) and the fluoroplastic in the presence of peroxide(s);
• (b) kneading the binder with the electrode activator in the presence of a solvent to prepare a slurry;
• (c) applying the slurry onto the surface of a collector;
• and
• (d) drying the slurry applied in step (c).

A method for producing an electrode for cell comprising a layer of an electrode-forming substance comprising an electrode activator and a binder coated or bonded to a surface of a collector, wherein the binder is a fluoroplastic grafted with one or more acryl polymers consisting mainly of at least one monomer unit selected from esters of acrylic acid and/or methacrylic acid and that the content of said acryl polymer is 0.1 to 20% by weight of said binder comprising the steps of:

• (a) preparing a slurry of fluorinated monomers, peroxide(s). the acrylic polymer(s) and a solvent;
• (b) coating the slurry obtained in step (a) onto a collector;
• and
• (c) heating the slurry-coated collector obtained in step (b) to a temperature suitable for polymerization and graft reaction of the fluoroplastic.