US Patent 7867616 - SWCNT electrodes for electrochromic glass

http://www.freepatentsonline.com/7867616.html

This patent from Honda Motor teaches a variation of smart glass using single walled carbon nanotubes to form transparent electrodes. Claim 1 reads:

1. An electrochromic device, the device comprising:

a first transparent electrode,

a second transparent electrode, and

an electrolyte positioned between the first and second transparent electrodes,

wherein the first and second transparent electrodes each comprise substantially the same composition of carbon single-walled nanotubes (SWNTs) deposited on a substrate to provide the electrode wherein the electrode is transparent and electrically conductive; and

wherein the device has a visible light transmittance of greater than 70%.