Abstract
The electrochromic behaviors of polyaniline films were investigated by potential step and cyclic voltammetry coupled with UV viscosity photometer. The polyaniline films show colorful changes from pale yellow to green and then to blue. Electrochromic stability, electrochemical behavior, coloring performance, optical properties and surface formations of the produced films were studied in detail. The working electrode was the flexible PANI electrode, and the counter electrode and the reference electrode were a platinum sheet and Ag/AgCl, respectively. The in situ optical transmittance of the PANI film at 650 nm was measured using an ultraviolet-visible-near-infrared spectrophotometer (Shimadzu UV-3101PC) combining with a square quartz tank during all electrochemical cycling. The electrochemical tests were performed on a Princeton Versa STAT 4 electrochemical workstation. The electrochromic performance of polyaniline films has been studied using cyclic voltammetry and chronoamperometry over the potential window of -0.2 to 1.2 V in 1 mol·L-1 LiClO4+ propylene carbonate. The polyaniline films exhibited electrochromism with color that changed from pale yellow (Leucoemeraldine base at 0.4 V) to dark green (Emeraldine salt at 0.8 V) to dark blue (Emeraldine base at 1.2 V) in their oxidized states. This work reports the electrochemical cycling stability of polyaniline films in different color change intervals. It was found that the chronoamperometric current did not change significantly in the interval from yellow to green. In addition, the charge amount changed steadily and the electrochromic performance of the film was good. The electrochromic cycle performance was poor when the film changed from yellow to blue as well as green to blue. While in the interval from yellow to green on switching between 0.4 and 0.8 V, the electrochemical cycling stability was good; the response time of the film for the coloring was found to be 4.5 s and the coloring efficiency of the polyaniline film was observed to be 159.48 cm2·C-1.
Graphical Abstract
Keywords
polyaniline, electrochromism, optoelectronic performance, cyclic performance
Publication Date
2019-12-28
Online Available Date
2018-07-17
Revised Date
2018-06-26
Received Date
2018-05-17
Recommended Citation
Kun XU, Kai-ling ZHOU, Hao WANG, Jing-bing LIU, Hui YAN.
Electrochemical Cycling Stability of Polyaniline Films in Different Color Ranges[J]. Journal of Electrochemistry,
2019
,
25(6): 690-698.
DOI: 10.13208/j.electrochem.180516
Available at:
https://jelectrochem.xmu.edu.cn/journal/vol25/iss6/6
References
[1] Granqvist C G. Handbook of inorganic electrochromic materials (1st Edition)[M]. The Netherlands, Amsterdam, Elsevier Science B. V., 1995.
[2] Deng Z H(邓正华), Wan G X（万国祥）, Qu X Z（屈晓庄）, et al. Study on electrochromic effect of polyaniline film[J]. Materials Science Progess(材料科学进展), 1988, 2(2): 20-25.
[3] Cao X Y(曹晓燕). Some effects of Co on the electrochromic properties of NiOxHy film[J]. Journal of Electrochemistry(电化学), 1999, 5(1): 59-67.
[4] Tan Y T(谭永涛), Ran F(冉奋), Wang L R(王翎任), et al. Electrochemical capacitive performance of polyaniline electrode with different electrolytes[J]. Journal of Electrochemistry(电化学), 2011, 17(1): 88-92.
[5] Lin T H, Ho K C. A complementary electrochromic device based on polyaniline and poly (3, 4-ethylenedioxythiophene)[J]. Solar Energy Materials & Solar Cells, 2006, 90(4): 506-520.
[6] Wei H G, Yan X R, Wu S J, et al. Electropolymerized polyaniline stabilized tungsten oxide nanocomposite films: electrochromic behavior and electrochemical energy storage[J]. Journal of Physical Chemistry C, 2012, 116(47): 25052-25064.
[7] Huang M R, Tao T, Li X G, et al. An electrochromic film device to teach polymerelectrochemical physics[J]. American Journal of Physics, 2007, 75(75): 839-843.
[8] Zhang W Z, Ju W X, Wu X M, et al. Structure, stability and electrochromic properties of polyaniline film covalently bonded to indium tin oxide substrate[J]. Applied Surface Science, 2016, 367: 542-551.
[9] Sonavane A C, Inamdar A I, Deshmukh H P, et al. Multicoloured electrochromic thin films of NiO/PANI[J]. Journal of Physics D: Applied Physics, 2010, 43(31): 315102.
[10] Zhang G R(张贵荣), Xu C T(徐承天), Zhang A J(张爱健), et al. Study on electrochemical copolymerization of aniline with p-phenylenediamine on ITO electrode by in situ UV-Vis spectroscopy and characterization of the copolymer[J]. Acta Chimica Sinica(化学学报), 2008, 66(3): 376-384.
[11] Wang Y Y(王杨勇), Jing X L(井新利), Qiang J F(强军锋). In-situ polymerization of polyaniline/carbon nanotube composite[J]. Acta Materiae Compositae Sinica(复合材料学报), 2004, 21(3): 38-43.
[12] Fan J X(范竞雄), Yang J P(杨继萍). Synthesis and characterization of polyaniline-palladium nanocomposites via in-situ reduction method[J]. Fiber Reinforced Plastics/Composites(玻璃钢/复合材料), 2013, z2(6): 53-56.
[13] Firat Y E, Peksoz A. Electrochemical synthesis of poly-aniline/inorganic salt binary nanofiber thin films for electrochromic applications[J]. Journal of Materials Science Materials in Electronics, 2017, 28(4): 3515-3522.
[14] Xu N, Shen X D, Cui S, et al. A facile process for preparation of polyaniline/polyacrylic acid composite electrochromism films[J]. High Performance Polymers, 2011, 23(7): 489-493.
[15] Xu L(徐磊), Wang W(王玮), He B L(贺本林), et al. Capacitance performance of polyaniline in organic solvent[J]. Development and Application of Materials(材料开发与应用), 2009, 24(2): 25-28.
[16] Ma L H(马丽华). Preparation and charactereation water-soluble conductive polyaniline complex electrochromic film[D]. Southwest University(西南大学), 2007.
[17] Zhou K L, Wang H, Zhang Y Z, et al. Understand the degradation mechanism of electrochromic WO3 films by double-step chronoamperometry and chronocoulometry techniques combined with in-situ spectroelectrochemical study[J]. Electroanalysis, 2017, 29(6): 121-125.
[18] Wang Z C, Hu X F, Kaell P O, et al. High Li+-ion storage capacity and double-electrochromic behavior of sol-gel-derived iron oxide thin films with sulfate residues[J]. ChemInform, 2001, 32(41): 186-191.
[19] Dang H N, Thao T T, Long P D, et al. Characterization of electrochromic properties of polyaniline thin films electropolymerized in H2SO4 solution[J]. Open Journal of Organic Polymer Materials, 2016, 6(1): 30-37.
[20] Watanabe A, Mori K, Iwasaki Y, et al. Polyanilines prepared by electrochemical polymerization: Molecular weight of polyaniline films[J]. Journal of Polymer Science Part A -Polymer Chemistry, 2010, 27(13): 167-174.
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