Electrochromic
materials (ECMs) are capable of reversibly adjusting
their transmittance or reflectance properties in response to changes
in the external biasing voltages. In this study, we enhanced the electrochromic
and electrochemical properties of polyaniline (PANi) effectively through
the incorporation of MXene Ti2CTx using an insitu composite
strategy. This improvement in the electrochromic and electrochemical
properties observed can be attributed to the intermolecular forces
between the aniline group of PANi and the terminal groups of MXene
Ti2CTx sheets. The presence
of hydrogen bonds between the PANi monomers and the MXene sheets was
confirmed through theoretical calculations and photoluminescence results,
which effectively improved the composite interfaces. Additionally,
the PANi@MXene composite films were successfully prepared through
a simple one-step insitu polymerization
process, as verified by SEM and XPS characterization. The electrochemical
studies revealed enhanced electronic conductivity, a high ion diffusion
coefficient, and a narrow energy redox gap, all contributing to the
excellent electrochemical properties observed. Overall, our results
demonstrate that the MXene Ti2CTx composition effectively enhances the electrochromic performance
of PANi. The PANi@MXene composite films exhibited a high optical modulation
range, rapid switching response time, good thermal radiation regulation,
and excellent operational stability. This composite strategy significantly
improves the performance and practical applicability of ECMs.