Patent ID: 9570740
Date: 2017-02-14
CPC Classifications: H01M,Y02E,Y02P,Y10T

Claim:
1. A nonaqueous electrolyte secondary battery including a positive electrode, a negative electrode and a nonaqueous electrolytic solution, wherein the nonaqueous electrolytic solution contains a nitrile compound having a chain saturated hydrocarbon group and a nitrile group, the number of carbon atoms in the nitrile compound is four or more, the positive electrode contains a positive-electrode active material on the surface of which particles of a rare earth compound are uniformly dispersed deposits; wherein the rare earth compound consists essentially of a hydroxide or a oxyhydroxide of at least one element selected from the group consisting of erbium, samarium, neodymium, dysprosium, holmium, and thulium, and wherein the positive-electrode active material is at least one selected from the group consisting of lithium cobalt oxide, Ni—Co—Mn-containing lithium composite oxide, Ni—Mn—Al-containing lithium composite oxide and Ni—Co—Al-containing lithium composite oxide.