Patent ID: 9716267
Date: 2017-07-25
CPC Classifications: H01M,Y02E

Claim:
1. A positive electrode active material layer comprising a first positive electrode active material, a second positive electrode active material having a lower charge/discharge potential than the first positive electrode active material, and an additive, wherein the first positive electrode active material is a compound having a layered rock salt structure and represented by a general formula: Li the second positive electrode active material is a material represented by a general formula: LiM a blending mass ratio of the first positive electrode active material and the second positive electrode active material in the positive electrode active material layer is in a range of 72:28 to 65:35, and when a tap density of the first positive electrode active material is defined as dt a mass percentage of the first positive electrode active material in the positive electrode active material layer is defined as Wt a porosity of the positive electrode active material layer is defined as p, the positive electrode active material layer satisfies (1−p)×(Wt