Patent ID: 7070883

Claim:
A non-aqueous electrolyte secondary battery comprising: an electrode body comprising an anode and a cathode, wherein an anode mix including one or more active materials capable of doping and de-doping lithium is formed on both sides of an anode collector of the anode, and wherein a cathode mix including one or more cathode active materials capable of doping and de-doping lithium is formed on both sides of a cathode collector of the cathode; and a non-aqueous electrolyte solution comprising an electrolyte dissolved in a non-aqueous solvent; wherein the anode mix and the cathode mix each comprise a conductive agent wherein the conductive agent consists essentially of flaky graphite having a thickness of a (002) plane spacing greater than 100 nm, granulated carbon having a thickness of a (002) plane spacing of 100 nm or less, and a carbon black, and wherein a weight ratio in the conductive agent between the flaky graphite and the granulated carbon with respect to the carbon black ranges from 98:2 to 70:30, wherein a weight ratio in the conductive agent of the flaky graphite with respect to the carbon black ranges from 49:2 to 35:30, and wherein the total conductive agent in each of said anode mix and said cathode mix ranges from 1.5% by weight to 10% by weight wherein a weight ratio in the conductive agent of the flaky graphite to the granulated carbon is about 1:1.