Viologen derivatives have the ability to change color in UV-Vis range as well as to strongly absorb in near-IR. Their redox properties can also be used for electrochemical energy storage.
Based on these multifunctional materials, we are developing a dual system with electrochromic properties to adjust the optical contrast as well as the ability to store energy, resulting in an electrochromic energy storage system. Unlike commercial systems, transparent mode is here achieved without current, significantly reducing system power consumption. The organic layers can be deposited either on rigid glass or on flexible plastics. Finally, this system is being developed using bio-based products.
EP3453038 / US20190173078
Electrochromic - Optical contrast - Energy storage - Battery - Smart glass - Electroactive ionic liquid polymers
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