RECHARGEABLE LITHIUM BATTERY WITH CONTROLLED PARTICLE SIZE RATIO OF ACTIVATED CARBON TO POSITIVE ACTIVE MATERIAL

摘要

A rechargeable lithium battery that includes: a negative electrode including a negative active material, and a positive electrode including a positive active material and activated carbon. When the positive active material includes a lithium nickel-based oxide, a lithium cobalt-based oxide, a lithium manganese-based oxide, a lithium titanium-based oxide, a lithium nickel manganese-based oxide, a lithium nickel cobalt manganese-based oxide, a lithium nickel cobalt aluminum-based oxide, or a combination thereof, the average particle diameter of the activated carbon is greater than about 100% and less than about 1000% of the average particle diameter of the positive active material. When the positive active material includes a lithium iron phosphate-based compound, the average particle diameter of the activated carbon is greater than or equal to about 1000% and less than or equal to about 3000% of the average particle diameter of the positive active material.

主权项

1. A rechargeable lithium battery, comprising:
a negative electrode comprising a negative active material; and a positive electrode comprising a positive active material and activated carbon, wherein the negative active material comprises a carbon-based material having an interlayer spacing of a (002) plane from about 0.34 nm to about 0.50 nm measured by X-ray diffraction using CuKα, the positive active material comprises a lithium nickel-based oxide, a lithium cobalt-based oxide, a lithium manganese-based oxide, a lithium titanium-based oxide, a lithium nickel manganese-based oxide, a lithium nickel cobalt manganese-based oxide, a lithium nickel cobalt aluminum-based oxide, or a combination thereof, and an average particle diameter of the activated carbon is greater than about 100% and less than about 1000% of an average particle diameter of the positive active material.