Patent ID: 7897674

Claim:
Polymer electrolyte for an electrochemical generator, wherein the polymer electrolyte comprises: (a) at least one four-branched polymer having a hybrid termination, wherein at least one branch of said four branched polymer is capable of giving rise to cross-linking; with (b) at least one component selected from the group consisting of SiO 2 , Al 2 O 3 , nano TiO 2 noncoated, nano TiO 2 coated with an organic material that is compatible with a tetrafunction terminal acryloyl-modified alkylene oxide polymer, the organic material being selected from at least one polyol or at least one polyethylene-polyoxyethylene copolymer and nano TiO2 coated with an inorganic material selected from SiO 2 and Al 2 O 3 , wherein the polymer electrolyte exhibits a stability voltage higher than 4 volts.