Scalable electrochemical grafting of anthraquinone for fabrication of multifunctional carbon fibers

蒽醌 超级电容器 材料科学 纤维 电化学 电容 化学工程 表面改性 碳纤维 循环伏安法 电极 纳米技术 复合材料 化学 复合数 物理化学 工程类
作者
Piers Coia,Bhagya Dharmasiri,Filip Stojcevski,David J. Hayne,Elmer Austria,Behnam Akhavan,Joselito M. Razal,Ken Aldren S. Usman,Melissa K. Stanfield,Luke C. Henderson
出处
期刊:Journal of Materials Science & Technology [Elsevier BV]
卷期号:200: 162-175 被引量:4
标识
DOI:10.1016/j.jmst.2024.03.006
摘要

Carbon fiber electrodes were prepared by grafting anthraquinone molecules via a scalable electrochemical approach which simultaneously increased interfacial and electrochemical capacitance properties. In this work, anthraquinone diazonium salts were synthesized and grafted onto carbon fiber tows at various concentrations. These modified fibers were subsequently evaluated mechanically and electrochemically to analyze their suitability in structural supercapacitors. Compared to control fibers, the grafted anthraquinone groups resulted in a 30% increase in interfacial shear strength (IFSS) and 6.6× increase in specific capacitance. Industry application was also a focus thus carbon fibers were also modified with in-situ generated diazonium salts to determine the applicability to an in-line industrial process. Specifically, potentiostatic functionalization of fibers with in-situ generated diazonium salts AQ-1 and AQ-2, showed 3× and 4.3× increase in specific capacitance, respectively, relative to unmodified carbon fiber (CF). We expect that implementing a scalable method to introduce a conductive and electrochemically active covalently bound surface chemistry layer onto carbon fiber exhibits a higher specific capacitance than carbon fiber grafted with most other small molecules reported in literature. This will open new avenues for manufacturing multifunctional and high-performance fibers with tailored properties for specific/targeted applications.
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