The Progress and Outlook of Multivalent‐Ion‐Based Electrochromism

Electrochromic technology has witnessed numerous achievements in recent years both research and commercialization. devices (ECD) based on different electrochemical mechanism have been developed for various applications, ranging from smart windows, thermal management, rear views, display, camouflage, etc. Compared to conventional ECDs monovalent charge carriers (e.g., H + , Li ), incorporating multivalent ions with rich electrochemistry, high density, small ionic radius opened new possibilities novel ECDs. The merits of are harvested activated by ion intercalation/deintercalation Zn 2+ Al 3+ Ca Mg reversible metal electrodeposition Cu Bi dynamic metal–ligand interactions Fe ). Herein, the working mechanism, characteristics, up‐to‐date summarized classified accordingly. applications energy storage, multicolor displays, etc., exemplified. issues challenges encountered emphasized, future directions developing also summarized. aim this review is inspire more efforts exploration proliferation