Patent ID: 8643930

Claim:
An electrochromic cell, comprising: a negative electrode comprising a cathodic electrochromic material that darkens upon electrochemical reduction; a positive electrode comprising a nanocomposite material that includes two constituent components, one of the constituent components being an amorphous, solid state matrix of lithium-based superionic conductor comprising lithium-tungsten-oxide (Li—W—O), wherein the lithium-tungsten-oxide (Li—W—O) consists of at least one of stoichiometric Li 2 WO 4 stoichiometric Li 2 W 4 O 13 or both, and the second of which constituent components includes anodic nanoparticles of polycrystalline, lithiated, metal oxide dispersed in and surrounded by the amorphous, solid state matrix of lithium-based superionic conductor, where the metal in the anodic nanoparticles of polycrystalline, lithiated, metal oxide includes at least one of Ni, Mn, Co, Fe, and V; and a lithium ion electrolyte sandwiched between the negative electrode and the positive electrode.