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Purification of Viologen Phosphate Disclosure Number: IPCOM000069826D
Original Publication Date: 1978-Jun-01
Included in the Prior Art Database: 2005-Feb-21

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Barclay, DJ Bird, CL [+details]


White electrodes are a very desirable feature of electrochromic displays. Silver metallurgy in a viologen dihydrogenphosphate electrolyte offers good whiteness. However, small concentrations of halide ions, resulting from the viologen dihydrogenphosphate preparation process, have a damaging effect on the silver electrodes.