(JP10308238-A)      A fibrous sheet (I) for forming a polymer gel electrolyte is prepared from an organic polymer (II) soluble in or plasticisable with a non-aqueous electrolyte and is not less than 10 microns thick. Also claimed are a polymer gel electrolyte and its method of manufacture by impregnation of the sheet (I) with a non-aqueous electrolytic solution followed by heat treatment to gel the polymer(II).    USE -   The fibrous sheet (I) is useful for the manufacture of polymer gel electrolyte layers for lithium primary and secondary batteries and electric double layer capacitors.    ADVANTAGE -   The polymer gel electrolyte layer is thin and has good electrical and mechanical properties.    (JP11102612-A)      A fibrous sheet (I) for forming a polymer gel electrolyte is prepared from an organic polymer (II) soluble in or plasticisable with a non-aqueous electrolyte and is not less than 10 microns thick. Also claimed are a polymer gel electrolyte and its method of manufacture by impregnation of the sheet (I) with a non-aqueous electrolytic solution followed by heat treatment to gel the polymer(II).    USE -   The fibrous sheet (I) is useful for the manufacture of polymer gel electrolyte layers for lithium primary and secondary batteries and electric double layer capacitors.    ADVANTAGE -   The polymer gel electrolyte layer is thin and has good electrical and mechanical properties.    (CN1204132-A)      A fibrous sheet (I) for forming a polymer gel electrolyte is prepared from an organic polymer (II) soluble in or plasticisable with a non-aqueous electrolyte and is not less than 10 microns thick. Also claimed are a polymer gel electrolyte and its method of manufacture by impregnation of the sheet (I) with a non-aqueous electrolytic solution followed by heat treatment to gel the polymer(II).    USE -   The fibrous sheet (I) is useful for the manufacture of polymer gel electrolyte layers for lithium primary and secondary batteries and electric double layer capacitors.    ADVANTAGE -   The polymer gel electrolyte layer is thin and has good electrical and mechanical properties.    (US6114068-A)      A fibrous sheet (I) for forming a polymer gel electrolyte is prepared from an organic polymer (II) soluble in or plasticisable with a non-aqueous electrolyte and is not less than 10 microns thick. Also claimed are a polymer gel electrolyte and its method of manufacture by impregnation of the sheet (I) with a non-aqueous electrolytic solution followed by heat treatment to gel the polymer(II).    USE -   The fibrous sheet (I) is useful for the manufacture of polymer gel electrolyte layers for lithium primary and secondary batteries and electric double layer capacitors.    ADVANTAGE -   The polymer gel electrolyte layer is thin and has good electrical and mechanical properties.    (TW394804-A)      A fibrous sheet (I) for forming a polymer gel electrolyte is prepared from an organic polymer (II) soluble in or plasticisable with a non-aqueous electrolyte and is not less than 10 microns thick. Also claimed are a polymer gel electrolyte and its method of manufacture by impregnation of the sheet (I) with a non-aqueous electrolytic solution followed by heat treatment to gel the polymer(II).    USE -   The fibrous sheet (I) is useful for the manufacture of polymer gel electrolyte layers for lithium primary and secondary batteries and electric double layer capacitors.    ADVANTAGE -   The polymer gel electrolyte layer is thin and has good electrical and mechanical properties.