Construction of nanocellulose-carboxylated carbon nanotube-graphite/polypyrrole flexible electrode composite based on interface interaction

被引：0
作者：
Gu S. [1 ]
Wang X. [1 ]
Xu G. [1 ]
机构：
[1] College of Engineering and Technology, Northeast Forestry University, Harbin
来源：
Fuhe Cailiao Xuebao/Acta Materiae Compositae Sinica | 2020年 / 37卷 / 09期
关键词：
Carboxylated carbon nanotubes; Composites; Flexible electrode; Interface interaction; Nanocellulose; Pencil graphite; Polypyrrole; Specific capacitance;
D O I：
10.13801/j.cnki.fhclxb.20200210.002
中图分类号：
学科分类号：
摘要：
Using nanocellulose(CNF), carboxylated carbon nanotubes(CNTs-COOH), pencil graphite(PGr) and polypyrrole(PPy) as raw materials, the CNF-CNTs-COOH-PGr/PPy flexible electrode composite with graphite layer structure was prepared by vacuum filtration, coating, oxidative polymerization and based on the principle of hydrogen bonding interface interaction. The results show that the CNF-CNTs-COOH-PGr/PPy flexible electrode composite does not break when it is flatted, folded and stretched, and exhibits strong mechanical properties, and its tensile strength reaches 28.90 MPa. The porous structure of hydrophilic CNF and CNTs-COOH enhances the diffusion path of ions and electrons. The addition of PGr effectively improves the conductive path of CNF-CNTs-COOH-PGr/PPy flexible electrode composite and gives it excellent conductive properties. The conductivity of CNF-CNTs-COOH-PGr/PPy flexible electrode composite obtained after the oxidative polymerization reaches 5.403 S•cm-1. In the 1 mol•L-1 H2SO4 solution, the CNF-CNTs-COOH-PGr/PPy flexible electrode composite has a high specific capacitance of 521 F•g-1 at the current density of 0.5 A•g-1. And its capacitance retention rate is as high as 68% after 1 500 charge and discharge cycles. Based on the excellent mechanical properties, the electrochemical properties and electrical conductivity of the flexible electrodes, the CNF-CNTs-COOH-PGr/PPy flexible electrode composite has the basis characteristics for becoming the electrode material for flexible energy storage devices. © 2020, Editorial Office of Acta Materiae Compositae Sinica. All right reserved.
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页码：2105 / 2116
页数：11
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