A strategy to boost electrochemical properties of the graphene oxide-poly(3,4-ethylenedioxythiophene) composites for supercapacitor electrodes
A strategy to boost electrochemical properties of the graphene oxide-poly(3,4-ethylenedioxythiophene) composites for supercapacitor electrodes
复制标题
提高超级电容器电极用氧化石墨烯-聚(3,4-乙撑二氧噻吩)复合材料电化学性能的策略
DOI：
10.1007/s10853-017-1904-x
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发表时间：
2018
影响因子：
4.5
通讯作者：
Zhai Hua-Jin
中科院分区：
文献类型：
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作者：
Zhou Haihan;Zhi Xiaomin;Zhai Hua-Jin
我们报告的战略，以提高氧化石墨烯-聚（3，4-乙撑二氧噻吩）（GO-PEDOT）复合材料的电化学电容性能。其基本思想是通过羧化处理将GO转化为羧化GO（CGO）。采用原位电化学聚合法制备了CGO掺杂的PEDOT（CGO-PEDOT）复合电极，充分利用CGO基平面上的含氧基团与PEDOT形成联合收割机，增强了PEDOT的超电容性能。在羧化过程中，GO上的羟基和环氧基团转化为羧基，如通过X射线光电子能谱和傅里叶变换红外光谱所表征的。电化学测试表明，CGO-PEDOT电极相比GO-PEDOT具有增强的超级电容性能。在CGO纳米片中，边缘和基面都覆盖有羧基，与仅使用边缘羧基的GO纳米片相比，提供了更多的用于与PEDOT涂层结合的活性位点。所制备的CGO-PEDOT复合电极表现出优异的上级倍率性能、高面积比电容（在10 mV s-1下为90.9 mF cm-2）和优异的循环稳定性（在5000次循环中保持99.6%的初始电容）。这项工作预计将激发进一步的研究兴趣CGO基复合电极在电化学储能。
We report on a strategy to enhance electrochemical capacitive properties of the graphene oxide–poly(3,4-ethylenedioxythiophene) (GO-PEDOT) composites. The basic idea is to convert GO to carboxylated GO (CGO) via carboxylation treatment. Composite electrodes of CGO-doped PEDOT (CGO-PEDOT) are fabricated by in situ electrochemical polymerization, which make adequate use of oxygenated groups on the basal plane of CGO to combine with PEDOT for enhanced supercapacitive properties. During carboxylation, hydroxyl and epoxide groups on GO are converted to carboxyl groups, as characterized by X-ray photoelectron spectroscopy and Fourier transform infrared spectroscopy. Electrochemical measurements show that CGO-PEDOT electrodes have boosted supercapacitive performances as compared to GO-PEDOT. In CGO nanosheets, the edges and basal planes are both covered with carboxyl groups, providing more active sites for combination with PEDOT coating, in contrast to GO nanosheets that only use edged carboxyl groups. The as-prepared CGO-PEDOT composite electrodes exhibit superior rate capability, high areal specific capacitance (90.9 mF cm−2at 10 mV s−1), and excellent cycling stability (retaining 99.6% of initial capacitance for 5000 cycles). This work is anticipated to stimulate further research interest for CGO-based composite electrodes in electrochemical energy storage.