Patent ID: 8916297
Filing Date: 2014-12-23
Classification: H01M,Y02E,Y02P,Y02T,Y10T

Abstract:
1. A method of preparing a gel polymer electrolyte secondary battery including a cathode, an anode, a separator and a gel polymer electrolyte in a battery case, the method comprising: (S1) manufacturing a cathode and an anode by adding a polymerization initiator to either a cathode slurry or an anode slurry, or both of the slurries, the slurry including an electrode active material, a conductive material, a binder and a solvent, coating the resultant slurry on a current collector, and pressing the slurry onto the current collector and drying the slurry; (S2) putting an electrode assembly including the cathode, the anode and a separator of a non-woven fabric into a battery case; and (S3) forming a gel polymer electrolyte by introducing a gel polymer electrolyte composition including an electrolyte solvent, an electrolyte salt and a polymer electrolyte monomer into the battery case and polymerizing the monomer. wherein the binder of (S1) is inert to chemical reactions initiated by the polymerization initiator and the slurry of (S1) do not have polymer electrolyte monomer therein.