A Comparison of the Electrochromic Behavior and the Mechanical Properties of WO 3 and NiO x Thin Film Electrodes

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Abstract
The charge‐discharge cycles of and thin film electrodes in a Li+‐propylene carbonate electrolyte have been followed in situ with a laser beam system that allows the simultaneous measurement of film transmittance and stress. Quantitative relationships have been established between film thickness, absorbance variation, mechanical compression, and charge inserted. The applications to electrochromic devices are discussed.