公开(公告)号：US3573106A

公开(公告)日：1971-03-30

申请号：US3573106D

申请日：1968-11-01

Applicant: ESB INC

Inventor： JOHNSON MARTIN H ,  LARSEN DUANE M ,  SAXE CARROL G

IPC: H01M2/14 ,  H01M2/16 ,  H01M10/36 ,  H01M3/02

CPC classification number: H01M2/1686 ,  H01M2/14 ,  H01M2/1653 ,  H01M10/36

Abstract: AN ELECTRIC BATTERY HAVING A LAMINATED SEMIPERMEABLE BARRIER/ABSORBENT SEPARATOR TO PROVIDE IMPROVED CYCLE LIFE AND/OR IMPROVED HIGH TEMPERATURE AND LONG DURATION STORAGE CAPABILITY. THE BATTERY EMPLOYS A CATHODE MATERIAL WHICH IS APPRECIABLY SOLUBLE IN THE ELECTROLYTE, AND THE SEPARATOR IS POSITIONED IN SUCH A MANNER THAT THE SEMIPERMEABLE BARRIER (E.G. CELLOPHANE) IS IN CONTACT WITH THE CATHODE MATERIAL AND THE ABSORBENT MATERIAL IS IN CONTACT WITH THE ANODE. THE ABSORBENT MATERIAL IS SPECIALLY PREPARED FROM A VINYL ACETATE-ETHYLENE COPOLYMER BINDER MATERIAL BLENDED WITH A GELLING AGENT (E.G. STARCH AND FLOUR). THE BARRIER MATERIAL PREVENTS CATHODE ACTIVE MATERIAL FROM MIGRATING TO THE ANODE, AND THE ABSORBENT MATERIAL ABSORBS THE BATTERY ELECTROLYTE AND IMMOBILIZES IT IN CONTACT WITH THE ANODE SURFACE.