Patent ID: 6942946

Claim:
A positive electrode for a non-aqueous electrolyte secondary battery, comprising: a positive electrode mixture layer; and a positive electrode current collector which carries said positive electrode mixture layer, said positive electrode mixture layer comprising: at least one positive electrode active material; at least one conductive agent; at least one binder; and at least one thickening agent, said thickening agent comprising a polymer containing at least one acrylonitrile unit and at least one —(CH2) n — structure portion where 6 ≦n, wherein said thickening agent has a solubility parameter δ at 25° C. of not less than 8.3 and not more than 13.5, said parameter being defined by the equation: δ=(Δ H/V ) 1/2 where ΔH is a molar heat of vaporization and V is a molar volume; and wherein the amount of said thickening agent contained in said positive electrode mixture layer is not less than 0.1 part by weight and not more than 1 part by weight per 100 parts by weight of said positive electrode active material.