IMPROVED LITHIUM ION POLYMER ELECTROLYTES AND METHODS OF MANUFACTURING AN ELECTROCHEMICAL CELL

摘要

A DIMENSIONALLY STABLE , HIGHLY RESILIENT, HYBRID COPOLYMER SOLID-SOLUTION ELECTROLYTE-RETENTION FILM FOR USE IN A LITHIUM ION BATTERY IN ONE PREFERED EMBODIMENT HAS A PREDOMINANTLY AMORPHOUS STRUCTURE AND MECHANICAL STRENGHT DESPITE CONTACT WITH LIQUID SOLVENT ELECTROLYTE . THE FILM IS A THINNED ( STRETCHED ), CAST FILM OF A HOMOGENEOUS BLEND OF TWO OR MORE POLYMERS , ONE OF WHICH IS SELECTED FOR ITS PRONOUNCED SOLVENT RETENTION PROPERTIES . A VERY HIGH SURFACE AREA INORGANIC FILLER DISPERSED IN THE BLEND DURING FORMATION THEREOF SERVES TO INCREASE THE POROSITY OF THE FILM AND THEREBY ENHANCE ELECTROLYTE RETENTION . THE FILM IS SOAKED IN A SOLUTION OF LIQUID POLYMER WITH LIQUID ORGANIC SOLVENT ELECTROLYTE AND LITHIUM SALT , FOR ABSORPTION THEREOF. USE OF A CROSS-LINKED LIQUID POLYMER ENHANCED TRAPPING OF MOLECULES OF THE ELECTROLYTE INTO PORES OF THE FILM . THE ELECTROLYTE FILM IS SANDWICHED BETWEEN FLEXIBLE ACTIVE ANODE AND CATHODE LAYERS TO FORM THE LITHIUM ION BATTERY . NOVEL METHODS ARE PROVIDED FOR FORMING THE ELECTRODES , THE POLYMER SUBSTRATE , AND OTHER ELEMENTS OF THE BATTERY .