NON-AQUEOUS ELECTROLYTE SECONDARY BATTERY, METHOD FOR MANUFACTURING POSITIVE ELECTRODE SHEET OF NON-AQUEOUS ELECTROLYTE SECONDARY BATTERY, AND METHOD FOR MANUFACTURING NON-AQUEOUS ELECTROLYTE SECONDARY BATTERY

摘要

A non-aqueous electrolyte secondary battery includes an electrode wound body formed by winding positive and negative electrode sheets with separators interposed therebetween. The positive electrode sheet is manufactured through a coating process wherein a positive electrode mixture paste is applied to a current collecting sheet to form a mixture layer. Prior to the coating process, sections of the current collecting sheet to be uncoated and to be coated are differentiated in terms of wettability. Alternatively, a positive electrode mixture paste with viscosities at slow and fast shear velocities within a predetermined range is used. Thus, the cross-sectional shape of the width-direction end of the mixture layer includes a steep cross-sectional shape, wherein the width of a section as thin as or thinner than 50% of a thickness of a width-direction center flat portion of the mixture layer is 100 μm or less.