Patent ID: 8962184
Filing Date: 2015-02-24
Classification: H01M,Y02E,Y02T

Abstract:
1. An anode active material for secondary batteries, capable of intercalating and deintercalating ions, the anode active material comprising: a core consisting of a crystalline carbon-based material; and present on a surface of said core, a composite coating layer comprising one or more materials selected from a group consisting of low crystalline carbon and amorphous carbon, and silicon oxide capable of intercalating and deintercalating ions, wherein the composite coating layer has (i) a structure in which a filler comprising the silicon oxide capable of intercalating and deintercalating ions is uniformly distributed in a matrix comprising one or more materials selected from the group consisting of low crystalline carbon and amorphous carbon, or (ii) a structure in which a filler comprising one or more materials selected from the group consisting of low crystalline carbon and amorphous carbon is uniformly distributed in a matrix comprising the silicon oxide capable of intercalating and deintercalating ions; wherein an amount of the composite coating layer is 0.1 to 20% by weight, based on the total amount of the anode active material, and wherein the silicon oxide capable of intercalating and deintercalating ions is a compound represented by the following formula: SiOx wherein x satisfies 0.1<×<1.5.