Electrode additives coated with electro conductive material and lithium secondary comprising the same

摘要

Provided are an electrode additive coated with a coating material made of electrically conductive materials such as metal hydroxides, metal oxides or metal carbonates, and an electrode and a lithium secondary battery comprising the same. The electrode additive in accordance with the present invention can improve high temperature storage characteristics of the battery, without deterioration of performance thereof.

主权项

1. An electrode comprising an electrode active material, an electrode additive, and a carbon-based conductive material,
wherein the electrode additive has a core particle coated with a coating material on the surface of the core particle, wherein the coating material is electro-conductive, wherein the coating material and the electrode active material are different materials, wherein the electrode additive is present in an amount in the range of 0.05 to 10% by weight, relative to the electrode active material, wherein the electrode additive is present in an amount less than an amount of the carbon-based conductive material, wherein the coating material is composed of one or more materials selected from the group consisting of carbon, an electro-conductive metal, an electro-conductive inorganic material and an electro-conductive polymer, and wherein the electro-conductive metal is selected from the group consisting of Cu, Ag, Pt and Ni, the electro-conductive inorganic material is selected from the group consisting of zinc oxide (ZnO), ruthenium oxide (RuO2) and TiB2, and the electro-conductive polymer is selected from the group consisting of polypyrrole and polyaniline.