Porous perovskite nickelates with enhanced electrochromic properties and systems thereof

A method of making an electrochromic structure, comprising:

• coupling a first transparent conductor (CONDUCTOR-I) layer to a first transparent non-conductive (GLASS-I) layer;
• coupling an ion storage layer to the CONDUCTOR-I layer;
• coupling an electrolyte layer to the ion storage layer;
• coupling an electrochromic layer to the electrolyte layer;
• coupling a second transparent conductor (CONDUCTOR-II) layer to the electrochromic layer;
• and
• coupling a second transparent non-conductive (GLASS-II) layer to the CONDUCTOR-II layer,
• wherein the electrochromic layer includes perovskite nickelates thin films formed on the CONDUCTOR-II layer and which has crystalline grains of the size of about 5 nm to about 200 nm and intergranular porosity of about 5% to about 25%.

An electrochromic system, comprising:

• a plurality of electrochromic structures separated from one another by a gap, each electrochromic structure comprising:
• a first transparent non-conductive (GLASS-I) layer;
• a first transparent conductor (CONDUCTOR-I) layer coupled to the GLASS-I layer;
• an ion storage layer coupled to the CONDUCTOR-I layer;
• an electrolyte layer coupled to the ion storage layer;
• an electrochromic layer coupled to the electrolyte layer;
• a second transparent conductor (CONDUCTOR-II) layer coupled to the electrochromic layer;
• and
• a second transparent non-conductive (GLASS-II) layer coupled to the CONDUCTOR-II layer,
• wherein the electrochromic layer includes perovskite nickelates thin films formed on the CONDUCTOR-II layer and which has crystalline grains of the size of about 5 nm to about 200 nm resulting in intergranular porosity of about 5% to about 25%.