Patent ID: 7722986

Claim:
Electrochromic cell in thin films with an emissivity of light that varies as a function of an applied control voltage, formed of the following flexible elements, superimposed and respectively in intimate contact: a first current collector in electrically conducting material and intended to be connected to a first potential of the control voltage, a porous counter electrode formed of a mixture of polyvinylidene difluoride hexafluoropropylene (PVDF-HFP), polyethylene oxide (PEO), if necessary at least one other hydrophilic polymer, and a powder of a compound comprising ions complementary to insertion ions, a porous separator formed of a mixture of PVDF-HFP and PEO, a second current collector in electrically conducting material, intended to be connected to a second potential of the control voltage and capable of being traversed by ions, a porous electronic conduction layer of a mixture of PVDF-HFP, PEO and a powder of an electrically conducting material, a porous active layer formed of a mixture of PVDF-HFP, PEO and a powder of an insertion material, the counter electrode, the separator, the electronic conduction layer and the active layer being filled with an aqueous electrolyte.