Electrochromic devices with increased lifetime

An electrochromic device comprising:

• a first transparent conductor layer;
• an electrochromic layer;
• an interface layer positioned between and in contact with the first transparent conductor layer and the electrochromic layer;
• an electrolyte in contact with the electrochromic layer;
• an ion storage layer in contact with the solid electrolyte layer;
• a second transparent conductor layer in contact with the ion storage layer,
• wherein interface layer defines a plurality of particles that are electrochemically inactive under the switching voltages.

An electrochromic device, comprising:

• a first transparent conductor layer;
• an electrochromic layer;
• a toughened interface layer positioned between and operationally connected in electric communication with the first transparent conductor layer and the electrochromic layer;
• an electrolyte operationally connected to the electrochromic layer;
• an ion storage layer operationally connected to the solid electrolyte layer;
• and
• a second transparent conductor layer operationally connected to the ion storage layer,
• wherein the electrochromic device remains substantially free of interfacial delamination between the first transparent conductive and the electrochromic layer for at least 10,000 duty cycles.