Interfacial polyelectrolyte complexation spinning of graphene/cellulose nanofibrils for fiber-shaped electrodes
Autor: | Shengping Wen, Xiangfang Peng, Yuhua Cai, Bin-Yi Chen, Lihong Geng, Yufan Lin |
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Rok vydání: | 2020 |
Předmět: |
Supercapacitor
Materials science Graphene Mechanical Engineering 02 engineering and technology 010402 general chemistry 021001 nanoscience & nanotechnology Condensed Matter Physics 01 natural sciences Capacitance Polyelectrolyte 0104 chemical sciences law.invention Chemical engineering Mechanics of Materials law Electrode Ultimate tensile strength General Materials Science Fiber 0210 nano-technology Spinning |
Zdroj: | Journal of Materials Research. 35:122-131 |
ISSN: | 2044-5326 0884-2914 |
DOI: | 10.1557/jmr.2019.390 |
Popis: | Graphene-based flexible and wearable supercapacitors have been produced by wet spinning, in which organic solvent coagulating bath was prerequisite and spacers were usually incorporated to improve the electrochemical property but sacrificing the mechanical property. In this work, a nonorganic solvent spinning technology named as interfacial polyelectrolyte complexation (IPC), which was based on the spontaneous self-assembly of two oppositely charged polyelectrolyte solutions/suspensions to form continuous fibers on drawing in their interfaces, was proposed to fabricate graphene fiber–shaped electrodes for supercapacitors. Due to the excellent mechanical performance and hydrophilicity, cellulose nanofibrils (CNFs) were added to serve as an efficient reinforcing agent and spacer of graphene fiber electrodes. Consequently, the mechanical performance and specific capacitance of the fibers were improved but electrical conductivity was declined. Taking overall consideration, CNF/rGO60 fiber electrode possessed a superior integrated performance with a capacitance of 182.6 F/g, tensile strength of 480 MPa, and electrical conductivity of 5538.7 S/m. The IPC spinning provided an environmentally friendly strategy for the fabrication of fiber-shaped functional devices. |
Databáze: | OpenAIRE |
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