以聚苯乙烯磺酸(PSS)为掺杂剂,通过苯胺在还原氧化石墨烯(RGO)表面原位聚合得到具有电化学储能及电致变色性能的水溶性聚苯胺/石墨烯(PANI/RGO)复合电极材料。通过场发射扫描电子显微镜、傅里叶变换红外光谱仪、显微激光拉曼光谱仪对PANI/RGO复合电极材料的结构形貌进行表征,并研究了其电化学储能及电致变色性能。结果表明:PSS掺杂聚苯胺(PANI)包覆在RGO表面,PANI与RGO通过π-π共轭连接,包覆层产生空间位阻效应使RGO难以聚集并与PSS掺杂PANI一起稳定分散在水中。复合电极材料中RGO的双电层电容与PANI的赝电容产生协同效应,使电化学活性和电荷存储能力增强,电流密度为0.4A/g时复合电极材料比电容为179.6F/g,比PSS掺杂PANI比电容提升35.3%。复合电极材料在高电流密度下表现出较好的电容保持特性和循环稳定性,显示出更为显著的电致变色性能,其光学对比度比PSS掺杂PANI增强10.71%。
A water-soluble polyaniline/graphene (PANI/RGO) composite electrode material with electrochemical energy storage and electrochromic properties was synthesized by the in-situ polymerization of aniline on the surface of reduced graphene oxide (RGO) using polystyrene sulfonate (PSS) as a dopant.The structural morphology of the PANI/RGO composite was characterized by field emission scanning electron microscopy,Fourier transform infrared spectrometer and micro-laser Raman spectrometer,and its electrochemical energy storage and electrochromic properties were investigated.The result showed that PSS-doped PANI was coated on RGO surface,and PANI and RGO were interconnected through π-π conjugation.The coating layer generated steric hindrance,preventing RGO aggregation and enabling RGO stable dispersion in water together with PSS-doped PANI.The synergistic effect between double-layer capacitance of RGO in the composite and pseudocapacitance of PANI improved electrochemical activity and charge storage ability.The specific capacitance of the composite reached 179.6F/g at current density of 0.4A/g,which was 35.3% higher than PSS-doped PANI.The composite showed great capacity retention and good cycling stability under high current density.The composite exhibited more significant electrochromic properties compared to PSS-doped PANI,characterized by a 10.71% improvement in optical contrast.
[1] Duan H,Liu Y,Zhao X.Recent research progress of conductive polymer-based supercapacitor electrode materials[J].Textile Research Journal,2023,93(15/16):3884-3925.
[2] Liu Q,Yang L,Ling W,et al.Organic electrochromic energy storage materials and device design[J].Frontiers in Chemistry,2022,10:1001425.
[3] Mohanadas D,Sulaiman Y.Recent advances in development of electroactive composite materials for electrochromic and supercapacitor applications[J].Journal of Power Sources,2022,523:231029.
[4] Zhou B,Li H,Li Z,et al.The synthesis and properties of PANI/(TOCNF-SMWCNT) supercapacitor electrode materials by in situ polymerization[J].Journal of Dispersion Science and Technology,2023,44(8):1516-1525.
[5] Fenoy G E,Van der Schueren B,Scotto J,et al.Layer-by-layer assembly of iron oxide-decorated few-layer graphene/PANI∶PSS composite films for high performance supercapacitors operating in neutral aqueous electrolytes[J].Electrochimica Acta,2018,283:1178.
[6] Xiong S X,Lan J P,Yin S Y,et al.Enhancing the electrochromic properties of polyaniline via coordinate bond tethering the polyaniline with gold colloids[J].Solar Energy Materials & Solar Cells,2018,177:134-141.
[7] Yao P,Xie S,Ye M,et al.Smart electrochromic supercapacitors based on highly stable transparent conductive graphene/CuS network electrodes[J].RSC Advances,2017,7(46):29088-29095.
[8] Zhang S,Chen S,Cao Y,et al.Polyaniline nanoparticle coated graphene oxide composite nanoflakes for bifunctional multicolor electrochromic and supercapacitor applications[J].Journal of Materials Science:Materials in Electronics,2019,30(14):13497-13508.
[9] Wu X M,Wang Q G,Zhang W Z,et al.Enhanced electroche-mical performance of hydrogen-bonded graphene/polyaniline for electrochromo-supercapacitor[J].Journal of Materials Science,2016,51(16):7731-7741.
[10] Shao G.Graphene oxide:the mechanisms of oxidation and exfoliation[J].Journal of Materials Science,2012,47(10):4400-4409.
[11] 赵静,张红.氧化石墨烯的制备及低温还原研究[J].化学通报,2016,79(6):534-538.
[12] 南松楠,张宏伟,王钦雯.石墨烯基导电纸的制备及性能研究[J].材料研究学报,2016,30(11):855-860.
[13] Chu J,Lu D,Wu B,et al.Synthesis and electrochromic properties of conducting polymers:polyaniline directly grown on fluorine-doped tin oxide substrate via hydrothermal techniques[J].Solar Energy Materials and Solar Cells,2018,177:70-74.
[14] 吕文静,张颖君,师超,等.水溶性掺杂聚苯胺的制备及其性能研究[J].中国腐蚀与防护学报,2015,35(6):519-524.
[15] Ni Z,Wang Y,Yu T,et al.Raman spectroscopy and imaging of grapheme[J].Nano Research,2008,1(4):273-291.
[16] Wu T M,Lin Y W.Doped polyaniline/multi-walled carbon nanotube composites:preparation,characterization and properties[J].Polymer,2006,47(10):3576-3582.
[17] Liao R,Tang Z,Lei Y,et al.Polyphenol-reduced graphene oxide:mechanism and derivatization[J].Journal of Physical Chemistry C,2011,115(42):20740-20746.
[18] Zhang L L,Zhao X S.Carbon-based materials as supercapacitor electrodes[J].Chemical Society Reviews,2009,38:2520-2531.
[19] Umar A,Ahmed F,Ullah N,et al.Exploring the potential of reduced graphene oxide/polyaniline (rGO@PANI) nanocomposites for high-performance supercapacitor application[J].Electrochimica Acta,2024,479:143743-143753.
[20] Wang L,Lu X,Lei S,et al.Graphene-based polyaniline nanocomposites:preparation,properties and applications[J].J Mater Chem A,2014,2(13):4491-4509.
[21] Li S,Tao Y,Wu Y,et al.PANI/rGO-PAM/PVA hydrogels with applications in supercapacitive,photoelectric and strain sensing[J].Journal of Polymer Research,2024,31(3):69-88.
[22] Xiong S,Wang Y,Lu Y,et al.Enhancing the electrochromic performances of polyaniline film through incorporating poly-aniline nanofibers synthesized by interfacial polymerization approach[J].Polymer Bulletin,2018,75(8):3427-3443.
[23] Tanushree G,Love B,Suchita K,et al.Multifunctional electrochromic hybrid PANI@WO3 core-shell for energygeneration and storage[J].Journal of Energy Storage,2023,72:108640-108646.
[24] Emine G C E,Merve A.Hunting black color via absorption engineering:EDOT and thiophene-benzothiadiazole based black-to-transmissive copolymer and its electrochromic device application[J].Polymer,2023,264:125565-125574.
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