Patent ID: 9748565
Date: 2017-08-29
CPC Classifications: H01M,Y02E

Claim:
1. A non-aqueous electrolyte secondary battery comprising a positive electrode, a negative electrode, a non-aqueous electrolyte, and a separator, wherein the positive electrode comprises a positive electrode current collector and a positive electrode material mixture layer formed on one or both sides of the positive electrode current collector, the positive electrode material mixture layer has a thickness of 100 μm or more and 300 μm or less per side of the positive electrode current collector, the positive electrode material mixture layer includes a positive electrode active material, the positive electrode active material comprises a lithium-containing composite oxide obtained by baking under an oxygen gas atmosphere after preheating, the lithium-containing composite oxide is represented by a general compositional formula: Li where x is in the range of −0.5≦x≦0.5, and M comprises Ni and at least one selected from Co and Mn, 20≦a<100 and 50≦a+b+c≦100 are satisfied when the ratios of Ni, Co, and Mn to all the elements constituting M are a, b, and c, respectively, in units of mol %, and the ratio of elements other than Ni, Co, and Mn to all the elements constituting M is 2.0 mol % or less, the positive electrode active material is composed of secondary particles formed by aggregation of primary particles, an average particle size of the secondary particles is 6 μm or less, when an average particle size of the primary particles is A and the average particle size of the secondary particles is B, A/B is 0.1 or less, when diffraction-line integrated intensities of a (003) plane and a (104) plane in an X-ray diffraction chart of the positive electrode material mixture layer are I the positive electrode material mixture layer contains an organosilane compound represented by a general formula X the organosilane compound content is 0.05 to 3.0 mass % relative to the total mass of the positive electrode material mixture layer.