Electrochromic Covalent Organic Framework-Assembled Nanofibrous Membranes with Mimetic Chameleon Skin Architectures for Visible and Near-Infrared Camouflage Stealth

The developments of modern surveillance technology pose great challenges to combat concealment for warfighters. Traditional camouflage suits cannot accommodate the need for camouflage stealth in complex warfare scenarios. Herein, a bidirectional diffusion-controlled in situ synthesis methodology is reported to achieve electrochromic nanofibrous membranes with mimetic chameleon skin structures (CSENs) by assembling electrochromic covalent organic frameworks on nanofibers. CSENs exhibit reversible color changes in the visible and near-infrared ranges under an applied potential with fast response times (25.8 s/26.2 s). The macro- and mesoporous structures in CSENs favored the transportation of electrolyte ions, achieving excellent color difference and coloration efficiency of 35.58 and 1053.26 cm