NOVELTY - A nanostructured electrolyte material (100) comprises a domain (A) comprising an ionically-conductive polymer gel phase (110) and a domain (B) comprising a hard polymer phase (120) having a bulk modulus of more than 106 Pa at 90 degrees C, where the domain (A) forms a conductive portion of the electrolyte material and the domain (B) forms a structural portion of the electrolyte material. The electrolyte material is non-fluorinated, and has an ionic conductivity of 1x 10-4 Scm-1 at 25 degrees C.    USE - Nanostructured polymer electrolyte material is used for providing ionic communication between positive electrode and negative electrode in battery cell (claimed).    ADVANTAGE - The nanostructured polymer electrolyte material has high ionic conductivity, high mechanical strength, low reactivity with lithium, and reduced volatility and vaporization of solvents.    DETAILED DESCRIPTION - A nanostructured electrolyte material comprises a domain (A) comprising an ionically-conductive polymer gel phase and a domain (B) comprising a hard polymer phase having a bulk modulus of more than 106 Pa at 90 degrees C, where the domain (A) forms a conductive portion of the electrolyte material and the domain (B) forms a structural portion of the electrolyte material. The electrolyte material is non-fluorinated and has an ionic conductivity of 1x 10-4 Scm-1 at 25 degrees C. The ionically-conductive polymer gel phase contains a liquid electrolyte containing an electrolyte salt and a solvent. The electrolyte salt is lithium salt. The solvent is a polar additive chosen from substituted ether, substituted amine, substituted amide, substituted phosphazene, substituted polyethylene glycol, alkyl carbonate, nitrile, borane, and lactone. The solvent contains a room temperature ionic liquid (I) such as N-butyl-N-31-methylpyrrolidinium bis(3-trifluromethanesulfonyl)imide or l-butyl-3-methylimidazolium bis(trifluromethanesulfonyl)imide, Lewis acid (II) such as polyethylene glycol borate ester or polyethylene glycol aluminate ester, and a high dielectric organic plasticizer (III) such as ethylene carbonate or propylene carbonate. The ionically-conductive polymer gel phase further contains ceramic particles chosen from alumina particles, titanium oxide particles, and silica particles.    DESCRIPTION OF DRAWING(S) - The drawing shows a schematic view of the nanostructured polymer electrolyte material.    Nanostructured polymer electrolyte material (100)    Ionically-conductive polymer gel phase (110)    Hard polymer phase (120)