▎ 摘　　要

Hydrogen bonding of graphene (S-G) was prepared by self-assembly method. Polyaniline (PANI)-based composites films with S-G were prepared by using in electrochemistry polymerization, which made solid-state electrochromic device (S-G/PANI) assembled. Scanning electron microscopy (SEM), X-ray diffraction techniques (XRD), Fourier transform infrared (FT-IR), transmission electron microscopy (TEM), thermogravimetric analysis (TGA), UV-vis absorption spectra and cyclic voltammetry (CV) measurements were used to characterize the S-G/PANI film and solid-state electrochromic device. SEM and TEM showed a good and uniform dispersion of the S-G in the PANI matrix. The surface of the films contains hydrogen functional groups, which have been characterized by FT-IR. The different content of S-G played a pivotal role in the electron transfer and regulated the conductivity of the films. UV-vis absorption spectra and CV measurements showed the S-G/PANI-5 changed to the range of green to black and good electrochromic cycle characteristics, switching color is for 5.23 s, and bleaching for 1.04 s. (C) 2015 Elsevier B.V. All rights reserved.