Patent ID: 8166794
Filing Date: 2012-05-01
Classification: H01M,Y02E

Abstract:
1. A quality judgment method for a positive electrode for a non-aqueous electrolyte secondary cell having a positive electrode mixture layer containing a positive electrode active material having a lithium nickel composite oxide and polyvinylidene fluoride, the method comprising the steps of: a sampling step of sampling the positive electrode mixture layer from the positive electrode; a heating step of heating the sampled positive electrode mixture layer to a temperature x (° C.) of 200° C. or higher and 400° C. or lower; a measuring step of measuring the amount of carbon dioxide gas generated from the heating; and a judging step of judging the positive electrode as a suitable positive electrode for the non-aqueous electrolyte secondary cell when the positive electrode active material satisfies formulas 3 and 4: where x is the heating temperature x (° C.) and y is the amount of carbon dioxide gas (mole/g) generated per 1 g of the positive electrode active material in the heating to the heating temperature x (° C.).