Development of Laminated Nickel/Manganese Oxide and Nickel/Niobium Oxide Electrochromic Devices

Publication Type

Conference Paper

Date Published

07/1991

LBNL Report Number

LBL-31173

Abstract

We report on the prepation, electrical and optical analysis of eIectrodes and prototype electrochromic devices using a solid polymer ion conductor. For these devices we developed electrodes consisting of cobalt-doped nickel oxide, manganese-nickel oxide, and niabium oxide. Optical and voltammetric data was obtained for each electrode. Solid polymer electrolytes were synthesized from modified amorphous poly(ethy1ene oxide) [a-PEO] complexed with a metal silicate. Electrochromic devices were made using cobalt-doped nickel oxide/niobium oxide, and cobalt-doped nickel oxide/manganese-nickel electrode laminations. Optical spectra as a function of voltage was obtained for each device. Our best cobalt-doped nickel oxide/a-PEO/rnanganese-nickel oxide device showed photopic transmittance to be Tp(bleached)=0.76 and Tp(colored)=0.44. The corresponding integrated solar transmittance was Ts(bleached)=0.64, Ts(colored)=0.46. Our best cobalt-doped nickel oxide/a-PEO/niobium oxide device had photopic transmittance of Tp(bleached)=0.65 and Tp(colored)=0.16. The corresponding integrated solar transmittance was Ts(bleached)=0.45 and Ts(colored)=0.15. Of the two devices, the nickel/niobium oxide device had the best combination of electrical and optical properties. Better device properties are expected with improvements in the solid polymer electrolyte and lamination process.

Conference Name

SPIE Proceedings 1536

Year of Publication

1991

Conference Location

San Diego, CA

Call Number

LBL-31173