Method for adhesion of wound electrodes or electrode lamination for use in a lithium-ion secondary battery

A method for adhesion of wound electrodes or electrode lamination for use in a lithium-ion secondary battery, the method comprising the:

• (a) coating a polymer solution selected from the group of polymers consisting of:
• (i) a Z-type polycarbonate in a solvent selected from the group of dichloromethane, ethyl carbonate, propyl carbonate, diethyl carbonate and mixtures thereof;
• (ii) vinylidene bifluoride/hexafluoroproylene copolymer in an admixture of acetone and tetrahydrofuran;
• (iii) diphenol A-diphenol carbonate copolymer in tetrahydrofuran;
• and
• (iv) polyamide in methanol on surfaces of positive and negative electrode sheets forming adhesive surfaces on the sheets;
• (b) forming a laminated electrode by sandwiching an isolation layer between the coated surfaces of the electrode sheets;
• and
• (c) vaporizing the solvent to separate the polymer to cohere the electrode sheets with the isolation layer whereby the electrode sheets are firmly and evenly laminated on the isolation layer.