{
  "$type": "site.standard.document",
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  "description": "A battery separator comprises micro porous membrane and coating on it. The coating is made of mixture containing gel forming polymer, and two solvents. The first solvent is more volatile than the second solvent. The second solvent is used to form pores in the gel-forming polymer. Independent claims…",
  "path": "/patents/1081992",
  "publishedAt": "2004-12-01T00:00:00.000Z",
  "site": "at://did:plc:oql6ds5vnff4ugar6rruliwd/site.standard.publication/3mn3ohu7oxx5w",
  "tags": [
    "H01M10/0565",
    "CELGARD INC [US]"
  ],
  "textContent": "A battery separator comprises micro porous membrane and coating on it. The coating is made of mixture containing gel forming polymer, and two solvents. The first solvent is more volatile than the second solvent. The second solvent is used to form pores in the gel-forming polymer. Independent claims are included for: (1) lithium polymer battery comprising anode, cathode, and the above separator sandwiched between anode and cathode; (2) making lithium polymer battery comprising providing anode, cathode and separator, treating separator with solution of plasticizer for gel forming polymer in solvent for the plasticizer, removing solvent for the plasticizer, sandwiching treated separator between anode and cathode, and bonding anode and cathode to the separator;and (3) making battery separator comprising providing micro porous membrane, providing mixture of gel forming polymer, and two solvents, coating mixture on the side of membrane, driving off the first solvent, thus forming micro porous membrane coated with non-porous coating of gel forming polymer and pore forming second solvent, and driving off the second solvent, thus forming micro porous membrane coated with the porous coating of the gel forming polymer.",
  "title": "Battery separator for lithium polymer battery"
}