| 摘要 |
PURPOSE: A secondary battery is provided to improve high-rate discharge performance and lifetime performance by improving adhesion of an active material by reducing electric resistance of an active material. CONSTITUTION: A secondary battery includes an electrode which consists of an active material, a conducting material (100), and a binder. The conducting material comprises a first nanocarbon conducting agent (110) with a first diameter; a second nanocarbon conducting agent (120) which has a second diameter larger than the first diameter. The mixing weight ratio of the first and second nanocarbon conducting agents is 1:0.2-1:5. The diameter ratio of the first diameter to the second diameter is 1:2-1:10. The specific surface area of the first nanocarbon conducting agent is 50-500 m^2/g and the specific surface area of the second nanocarbon conducting agent is less than 300 m^2/g. |
