A visible-to-infrared broadband all-solid-state electrochromic device based Li₄Ti₅O₁₂/WO₃ for optical and thermal management

Li₄Ti₅O₁₂ (LTO) has garnered attention for applications in smart window and thermal regulation. This work presents the preparation of an all-solid-state electrochromic device (ECD) based on Li₄Ti₅O₁₂ (LTO) and WO₃ for optical and thermal regulation. Upon electrochemical stimulation, the LTO/WO₃ composite demonstrates a synergetic effect on EC the properties of ECD in visible and IR wavelength. The IR emissivity modulation of the ECDs demonstrate a non-linear change with increasing the thickness of the LTO film, reaching a notable alteration in IR emissivity of 0.34 in the range of 2.5–25 μm. Meanwhile, the ECD reveals an impressive average transmittance modulation of over 60 % in the range of 400–1100 nm. This study exhibits the promising potential of Li₄Ti₅O₁₂/WO₃ composite-based ECD in the filed of optical and thermal management.