Approach to Significantly Enhancing the Electrochromic Performance of PANi by In Situ Electrodeposition of the PANi@MXene Composite Film

Yong Liu; Junyu Yuan; Yuqi Wang; Rongzong Zheng; Qibin Liu; Xiaojuan Shang; Jiaojing Shao; Zhongquan Wan; Junsheng Luo; Chunyang Jia

doi:10.1021/acsami.3c15548

Approach to Significantly Enhancing the Electrochromic Performance of PANi by In Situ Electrodeposition of the PANi@MXene Composite Film

ACS Appl Mater Interfaces. 2023 Dec 20;15(50):58940-58954. doi: 10.1021/acsami.3c15548. Epub 2023 Dec 6.

Authors

Yong Liu¹, Junyu Yuan², Yuqi Wang¹, Rongzong Zheng^{1

2}, Qibin Liu¹, Xiaojuan Shang¹, Jiaojing Shao¹, Zhongquan Wan², Junsheng Luo², Chunyang Jia²

Affiliations

¹ College of Materials and Metallurgy, Guizhou University, Guiyang 550025, China.
² State Key Laboratory of Electronic Thin Films and Integrated Devices, National Engineering Research Center of Electromagnetic Radiation Control Materials, School of Integrated Circuit Science and Engineering, University of Electronic Science and Technology of China, Chengdu 610054, PR China.

PMID: 38055846
DOI: 10.1021/acsami.3c15548

Abstract

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 Ti₂CT_x using an in situ 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 Ti₂CT_x 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 in situ 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 Ti₂CT_x 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.

Keywords: MXene; composite film; electrochromic; electrodeposition; polyamine; thermal radiation regulation.