Polymeric electrochromic electrodes

Details Polymeric electrochromic electrodes Polymeric electrochromic electrodes

1993-02-05

1994-12-27

LaRoche, Eugene R.

Optical: systems and elements

Optical modulator

Light wave temporal modulation

359268, 359269, 359270, 359273, G02F 101

Patent

active

053770390

ABSTRACT:
An improved multilayer electrochromic device, the improvement being to the electrochromic layer which necessarily must include an anion exchanging polymer having a polyoxometallate electrochromic counter ion. An example is the use of PW.sub.12 O.sub.40.sup.3- as the polyoxometallate electrochromic counter ion of an anion exchanging polymer of 90% quaternized 4-vinylpyridine and 10% styrene. Another example is the use of H.sub.2 W.sub.12 O.sub.40.sup.6- as the polyoxometallate electrochromic counter ion of an anion exchanging polymer of 90% protonated 4-vinylpyridine and 10% styrene.

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J. Chem. Soc. Faraday Trans. I, 1988, 84(11), 3941-3949, Takeo Shimidzu et al., Electrochromism of a Conducting Polypryrrole-Phosphotungstate Composite Electrode.
J. Electroanal. Chem., 279 (1990) 187-203, Keita et al., Surface Functionalization With Oxometallates Entrapped in Polymeric Matrices.

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