Ionic Storage Materials for Anodic Discoloration in Electrochromic Devices

Po-Wen Chen (), Chen-Te Chang and Po-Hsiu Kuo
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Po-Wen Chen: Department of Physics, National Atomic Research Institute, Taoyuan City 325207, Taiwan
Chen-Te Chang: Department of Physics, National Atomic Research Institute, Taoyuan City 325207, Taiwan
Po-Hsiu Kuo: Department of Physics, National Atomic Research Institute, Taoyuan City 325207, Taiwan

Energies, 2023, vol. 16, issue 24, 1-14

Abstract: The ion storage layer in electrochromic devices (ECDs) stores protons or lithium ions to provide electrochemical stability and extend cycle durability. This paper reports on the performance and stability of ECDs paired with various ion storage layers (NiO, V 2 O 5 , and IrO 2 films). The complementary ECD using a V 2 O 5 ion storage layer presented the fastest response time, but the lowest optical contrast. In addition, the ECD using an IrO 2 ion storage layer proved the most effective as an ion storage layer, due to its high optical modulation ability capability and long-term stability. Chronoamperometry analysis revealed that IrO 2 -based ECD (glass/IZTO/WO 3 /liquid electrolyte/IrO 2 /IZTO/glass) can be highly effective in modulating optical transmittance, as indicated by T = 61.5% (from T bleaching (69.6%) to T coloring (8.1%)) and switching times of 5.3 s for coloring and 7.3 s for bleaching at 633 nm.

Keywords: electrochromic device; ion storage layer; nickel oxides; vanadium oxides; iridium oxides (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2023
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