Patent ID: 6749650
Filing Date: 2004-06-15
Classification: H01M,Y02E,Y02P,Y10T

Abstract:
A method of making lithium-intercalateable cells for a lithium-ion battery with polymeric separators comprising the steps of:(A) providing a polymeric backing defining a separator; (B) applying a film-forming slurry and an electrically-conductive grid onto said separator such that said grid is imbedded in said slurry, wherein said slurry comprises a plurality of lithium-intercalateable particles dispersed throughout a mixture that includes a polymeric binder compatible with said battery and a plasticizer for said binder; and (C) thereafter, drying said slurry, thereby forming a first electrode having said separator; (D) thereafter, drying said first electrode by removing said solvent; (E) removing said plasticizer from said binder so as to leave a network of pores pervading said binder; (F) backfilling said pores with a lithium-ion-conductive electrolyte; (G) applying a first film-forming slurry to a first face of an electrically-conductive grid, said slurry comprising a plurality of said lithium-intercalateable particles dispersed throughout a mixture including polymeric binder; (H) thereafter, drying the first film-forming slurry; (I) applying a second film-forming slurry to a second face of said electrically-conductive grid of (G), said slurry comprising a plurality of said lithium-intercalateable particles dispersed throughout a mixture including polymeric binder; (J) thereafter, drying said second-film forming slurry, thereby forming a second electrode with film on either side of said grid of (G); and (K) laminating said first electrode with separator to said second electrode of (J).