退火时间对电致变色超级电容器ITO和PEDOT-ITO电极的影响

IF 5.6 3区 材料科学 Q1 ELECTROCHEMISTRY
Zefeng Xu , Dingwei Ji , Jun Wang , Yongfu Zhang , Chao Chen , Jianhang Li , Yimin Shen , Peihua Ma , Yiping Zhou , Jules Wolff , Yaokang Lv , Laurent Ruhlmann
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引用次数: 0

摘要

氧化铟锡(ITO)是一种广泛使用的电流收集器,许多报道的电致变色超级电容器(ECSCs)需要双功能电极,如市售的聚(3,4-乙烯二氧噻吩)-氧化铟锡(PEDOT-ITO)电极。本文比较了不同退火时间的磁控溅射ITO薄膜和PEDOT-ITO电极的表面形貌和性能。ITOA300(退火时间为300s)、ITOA600、ITOA900和ITOA1200表现出不同的表面粗糙度、电化学电阻率和稳定性。在这些ITO表面上电聚合的聚(3,4-乙烯二氧噻吩)(PEDOT)薄膜的形貌和制备的PEDOT-ITO电极的性能也不同。实验分析和理论计算结果表明,退火时间的延长导致ITO薄膜中氧空位的增加,ITO薄膜的电导率相应提高,3,4-乙烯二氧噻吩(EDOT)和PEDOT在ITO薄膜表面的化学吸附和连接能力相应增强。在4个PEDOT-ITO电极中,PEDOT-ITOA1200在电流密度为1 A·g−1时的Rct最小,为11.03 Ω,光学对比度最高(59.3%),放电比电容最大,为21.15 F·g−1,能量密度最大,为6.29 Wh·kg−1,比PEDOT-ITOA300 (5.24 Wh·kg−1)大20%。可以得出结论,适当延长ITO薄膜的退火时间是提高ECSCs性能的有效策略。这些结果也为ITO在其他电子器件上的工业应用提供了指导。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Effects of annealing time on ITO and PEDOT-ITO electrodes for electrochromic supercapacitors
Indium tin oxide (ITO) is a widely used current collector, and many reported electrochromic supercapacitors (ECSCs) require bifunctional electrode such as commercially available poly(3,4-ethylenedioxythiophene)-indium tin oxide (PEDOT-ITO) electrodes. Herein, the surface morphologies and properties of different magnetron sputtered ITO films with distinct annealing time and PEDOT-ITO electrodes were fully compared. ITOA300 (annealing time of 300 s), ITOA600, ITOA900, and ITOA1200 exhibit varying surface roughness, electrochemical resistivity and stability. The morphology of poly(3,4-ethylenedioxythiophene) (PEDOT) films that electropolymerized on these ITO surfaces and the properties of as prepared PEDOT-ITO electrodes were also different. Experimental analysis and theoretical calculation results showed that prolongation of annealing duration leads to the increase of oxygen vacancies in ITO films, the conductivity of ITO films was accordingly increased, the chemical adsorption and connection of 3,4-ethylenedioxythiophene (EDOT) and PEDOT on the surface of ITO films were stronger correspondingly. Among all four PEDOT-ITO electrodes, PEDOT-ITOA1200 showed the lowest Rct of 11.03 Ω, highest (59.3 %) optical contrast, largest discharge specific capacitance of 21.15 F·g−1 and largest energy density of 6.29 Wh·kg−1 at the current density of 1 A·g−1, 20 % larger than that of PEDOT-ITOA300 (5.24 Wh·kg−1). It can be concluded that, appropriately extending the annealing time of ITO film is an effective strategy for enhancing the performance of ECSCs. These results also offer guidance on industrial applications of ITO on other electronic devices.
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来源期刊
Electrochimica Acta
Electrochimica Acta 工程技术-电化学
CiteScore
11.30
自引率
6.10%
发文量
1634
审稿时长
41 days
期刊介绍: Electrochimica Acta is an international journal. It is intended for the publication of both original work and reviews in the field of electrochemistry. Electrochemistry should be interpreted to mean any of the research fields covered by the Divisions of the International Society of Electrochemistry listed below, as well as emerging scientific domains covered by ISE New Topics Committee.
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