Patent ID: 6737196
Filing Date: 2004-05-18
Classification: H01M,Y02E,Y02P

Abstract:
A method of making a lithium polymer battery comprising:preparing a positive active material by preparing a first solution by dissolving a binder in a solvent, adding a plasticizer, and adding LiCoO2 as a positive active material, and adding carbon black to the first solution to produce a first mixture; stirring the first mixture to increase viscosity of the first mixture; directly applying the first mixture to opposite sides of each of first and second aluminum foils, the first and second aluminum foils including a plurality of through holes extending through the first and second aluminum foils, as first and second positive collectors, to form first and second positive plates; preparing a negative active material by preparing a second solution by dissolving a binder in a solvent and adding a plasticizer, and adding carbon black to the second solution to produce a second mixture; stirring the second mixture to increase viscosity of the second mixture; directly applying the second mixture to opposite sides of a copper foil, the copper foil being free of holes, as a negative collector, to form a negative plate; laminating the first positive plate and the negative plate on opposite sides of a first separator and laminating the second positive plate and the negative plate on opposite sides of a second separator, the first and second positive plate sandwiching the negative plate and the first and second separators; and extracting the plasticizer from the first and second positive plates and the negative plate.