Patent ID: 9178209
Filing Date: 2015-11-03
Classification: H01M,Y02E

Abstract:
1. A cathode for a lithium secondary battery, comprising: a current collector; a first composite layer formed from a mixture of olivine-type lithium iron phosphate cathode active material powder and a binder on the current collector; and a second composite layer formed from a mixture of olivine-type lithium iron phosphate cathode active material powder and a binder on the first composite layer, wherein a specific surface area of the olivine-type lithium iron phosphate cathode active material powder in the second composite layer is 0.01 to 0.8 times that of the olivine-type lithium iron phosphate cathode active material powder in the first composite layer, wherein a load amount of the cathode active material in the first composite layer is 5 to 25 mg/cm