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