(JP11016578-A)      NOVELTY - The electrolyte (11) consists of a polymer material, a solvent salt mixture and a non-aqueous solvent. The polymer is polyacrylonitrile with a solubility parameter of 8-15 (cal/cm2)1/2. The mixed solvent consists of ethylene carbonate and propylene carbonate. The gel-like non-aqueous solvent which has LiPF6 as main constituent consists of either dimethyl carbonate, ethyl methyl carbonate, methyl propionate or ethyl propionate.    USE -   For lithium ion secondary battery.    ADVANTAGE -   Improves fire retardancy without impairing battery characteristics.    DESCRIPTION OF DRAWING(S) - The figure is the model diagram of electrolyte coated on diaphragm. (11) Gel-like electrolyte.    (JP11016579-A)      NOVELTY - An electrolyte salt is set to contain a non-aqueous solvent as main constituent. LiPF6 containing 30 mol% or less of gamma butyrolactone and a polymer containing polyacrylonitrile are also included in the composition.    USE -   For non-aqueous secondary batteries.    ADVANTAGE -   Improved fire retardancy and battery life as gamma butyrolactone is included.    (TW375843-A)      A cell comprises a positive electrode, a negative electrode and a gelated electrolyte composed of a high molecular material containing polyacrylonitrile and having solubility parameter of 8-15 (cal/cm2)1/2, a mixed solvent and an electrolyte salt composed of LiPF6. The mixed solvent is a mixture of ethylene carbonate, propylene carbonate and a third non-aqueous solvent which is 1 selected from dimethyl carbonate, ethyl methyl carbonate, methyl propionate and ethyl propionate.    USE -   For non-aqueous secondary electrochemical cell.    ADVANTAGE -   A carbide film is formed on the electrode surface, on contact with the flame, as a result of the carbonisation of the high molecular material and the carbonisation accelerating operation of LiPF6. This carbide film inhibits inflammation for realising superior combustion retardant properties. The cell has a high energy density and high energy density, and is safer.