Aiming at the drawbacks of high interfacial impedance and easy delamination in traditional multi-layer electrochromic devices, this study combines inorganic lithium magnesium silicate (LMS) with high ionic conductivity and organic hydroxyethyl cellulose (HEC) with excellent water-retention and crack-resistance properties to fabricate LMS-HEC@P₂W₁₈ all-in-one electrochromic device, and obtains the optimal LHP-3 system. The device achieves an optical contrast of 96% (Fig. 1a-b) with fast response and superior cycling stability (Fig. 1c-e). The large-area device realizes a temperature drop of 7.1 ℃ (Fig. 1f-i), which provides a feasible solution for the practical application of such devices.
 

polyoxometalate,one layer,Electrochromic devices