MANUFACTURE OF POSITIVE ELECTRODE OF NON-AQUEOUS ELECTROLYTE BATTERY

• Main Authors: YAMAMOTO KOHEI, SASAKI YASUTOSHI, HARADA YOSHIRO, TANAKA YUZO, ABE YUJI
• Format: Patent
• Language: English
• Published: 14.08.1990
• Subjects: BASIC ELECTRIC ELEMENTS; ELECTRICITY; PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY

PURPOSE:To prevent penetration of a separator by immersing a positive electrode plate made in the form of a sheet in a solution of a synthetic polymeric substance or in a dispersive liquid, performing heat treatment at a temp. over the melting point of this polymeric substance, and thereby fixing particles and/or particulates to the surface of positive electrode plate. CONSTITUTION:A positive electrode plate made in the form of a sheet is immersed in an aqueous solution of a synthetic polymeric substance, in aqueous dispersion liquid, or in a solvent dispersed liquid, and a heat treatment is performed at temps. over the melting point of this polymeric substance and below its carbonizing temp. Examples of this polymeric substance are polyethylene, polybinyl alcohol, carboxyl methylcellulose, polybinyl buthylale, and their salts. The heat treatment melts the polymeric substance once to form a thin film on the surface, which is thus smoothened. At this time of applying the coating, particles and/or particulates liberated from the surface of positive electrode plate are solidified so as to prevent them from stripping off.