Patent ID: 8687261

Claim:
An electrochromic device comprising: (a) a first electrode comprising one of a electrochromic layer or a counter electrode layer, (b) a second electrode comprising other of said electrochromic layer or said counter electrode layer, (c) an ion-conductor layer for conducting ions between said first and second electrodes, (d) a first conductive layer, and (e) a second conductive layer, said first and second electrodes and said ion-conductor layer being sandwiched between said first and second conductive layers, said counter electrode layer comprising at least one mixed oxide having a formula Li x Ni(II) 1âˆ’y Ni(III) y M z O a , where M is a metal, and x is about 0 to about 10, y is about 0 to about 1, z is about 0 to about 10, and a is from about (0.5x+1+0.5y+z) to about (0.5x+1+0.5y+3.5z).