LITHIUM ION BATTERY AND METHOD FOR MANUFACTURING THE SAME

摘要

PROBLEM TO BE SOLVED: To provide a lithium ion battery high in battery capacity and reliability without deteriorating storage stability of slurry, by suppressing segregation of a binder in a coating/drying process by lowering the polymerization degree of the binder, and a method for manufacturing the lithium ion battery.SOLUTION: The present invention provides a lithium ion battery including a collector from which generated electricity is taken out outside and an electrode film bonded on the surface of the collector by means of a binder. A ratio between binder concentration on the collector side of the electrode film and binder concentration on the opposite side from the collector is in the range of 0.5-2.