Patent ID: 11923536
Assignee: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H  Y | IPC H

Claim 0:
1. A secondary battery comprising an outer packaging and a battery and an electrolyte contained in the outer packaging, the battery comprising a positive electrode plate, a negative electrode plate, and a separator, wherein at least one of the positive electrode plate, the negative electrode plate and the separator comprises a composite material with a core-shell structure, wherein a core material comprises metallic copper or a copper-containing compound; a shell material comprises at least one of silicon dioxide and titanium dioxide; and wherein the core material has an the average particle size D50 of 0.01 μm-5 μm, and wherein the weight ratio of the core to the shell is from 10:1 to 20:1, when the separator comprises the composite material, the addition amount of the composite material per unit area of the separator is 0.1 g/m2-3 g/m2; or
when the negative electrode plate comprises the composite material, the composite material is added in an amount of 0.2% to 20% by weight, relative to the weight of the negative active material contained in the negative electrode plate; or
when the positive electrode plate comprises the composite material, the composite material is added in an amount of 0.2% to 20% by weight, relative to the weight of the positive active material contained in the positive electrode plate.