单极脉冲法沉积聚3,4-乙烯二氧噻吩及其电容性能
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摘要
聚3,4-乙烯二氧噻吩(PEDOT)因具有非常高的离子电导率而被广泛研究。文中以EDOT为单体,采用单极脉冲法在不锈钢片基底上制备了PEDOT膜电极。考察了不同脉冲参数对PEDOT膜超级电容的影响。通过扫描电子显微镜、傅里叶变换红外光谱表征PEDOT涂覆的不锈钢电极,确认了PEDOT由不规则的虚球体堆积成褶皱状结构,证实了Cl O4-成功掺杂于PEDOT膜中;通过循环伏安法、恒电流充电/放电和电化学阻抗谱得到:PEDOT电极展示出良好的比电容(128.64 F/g)、倍率性能和稳定性(循环2000次保留率达71.26%)。对于低成本、高性能的能量存储应用显示出相当大的潜力。
Poly(3,4-ethylenedioxythiophene)(PEDOT) was extensively studied for its high ionic conductivity. In this paper,PEDOT films electrodes were prepared on the stainless steel substrates by unipolar pulse method using 3,4-ethylenedioxythiophene(EDOT) as monomer. The effects of different pulse parameters on the capacitance of PEDOT films were investigated. The PEDOT-coated stainless steel electrode was characterized by scanning electron microscopy and Fourier transform infrared spectroscopy,which confirm that PEDOT films are deposited into a pleated structure by an irregular virtual sphere,and a high degree of ClO_4-is successfully doped in the PEDOT films. In addition,the results of cyclic voltammetry and galvanostatic charge/discharge show that the PEDOT electrodes exhibit a good specific capacitance of 128.64 F/g,rate performance and stability(retention rate = 71.26% after 2000 cycles). The thin,lightweight electrode material based supercapacitor shows considerable potential for low-cost,high-performance energy storage applications.
Poly(3,4-ethylenedioxythiophene)(PEDOT) was extensively studied for its high ionic conductivity. In this paper,PEDOT films electrodes were prepared on the stainless steel substrates by unipolar pulse method using 3,4-ethylenedioxythiophene(EDOT) as monomer. The effects of different pulse parameters on the capacitance of PEDOT films were investigated. The PEDOT-coated stainless steel electrode was characterized by scanning electron microscopy and Fourier transform infrared spectroscopy,which confirm that PEDOT films are deposited into a pleated structure by an irregular virtual sphere,and a high degree of ClO_4-is successfully doped in the PEDOT films. In addition,the results of cyclic voltammetry and galvanostatic charge/discharge show that the PEDOT electrodes exhibit a good specific capacitance of 128.64 F/g,rate performance and stability(retention rate = 71.26% after 2000 cycles). The thin,lightweight electrode material based supercapacitor shows considerable potential for low-cost,high-performance energy storage applications.
引文
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[5]Chen Y,Xu J,Mao Y,et al.Electrochemical performance of graphene-polyethylenedioxythiophene nanocomposites[J].Mater.Sci.Eng.,B,2013,178:1152-1157.
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[7]Anothumakkool B,Soni R,Bhange S N,et al.Novel scalable synthesis of highly conducting and robust PEDOT paper for a high performance flexible solid supercapacitor[J].Energ.Environ.Sci.,2015,8:1339-1347.
[8]Wang M,Jamal R,Wang Y,et al.Functionalization of graphene oxide and its composite with poly(3,4-ethylenedioxythiophene)as electrode material for supercapacitors[J].Nanoscale Res.Lett.,2015,10:370.
[9]Du X,Hao X,Wang Z,et al.Highly stable polypyrrole film prepared by unipolar pulse electro-polymerization method as electrode for electrochemical supercapacitor[J].Synth.Met.,2013,175:138-145.
[10]聂涛.电活性PEDOT/纳米复合材料应用于维生素B族的检测[D].南昌:江西农业大学,2014.Nie T.Determination of vitamin B by electroactive PEDOT/nanocomposites[D].Nanchang:Jiangxi Agricultural University,2014.
[11]李越,郝晓刚,王忠德,等.形貌可控纳米纤维聚苯胺膜的脉冲沉积及其电容性能[C].长沙:第六届全国化学工程与生物化工年会论文集,2010.
[12]Lu Y,Wen Y,Lu B,et al.Electrosynthesis and characterization of poly(hydroxy-methylated-3,4-ethylenedioxythiophene)film in aqueous micellar solution and its biosensing application[J].Chin.J.Polym.Sci.,2012,30:824-836.