Journal
CARBON
Volume 200, Issue -, Pages 38-46Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.carbon.2022.08.045
Keywords
MXene; Carbon nanotube; Fiber; Conductivity; Supercapacitors
Funding
- Foundation of the Sci- ence and Technology Program of Hainan Province [ZDYF2020230]
- Foundation of Guangdong Provincial Key Laboratory of Natural Rubber Processing [2019B121203004]
- Central Public -interest Scienti- fic Institution Basal Research Fund for Chinese Academy of Tropical Agricultural Sciences [1630122021007]
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This study reports an easily scalable wet-spinning strategy to fabricate high-strength, electrically conducting fibers with excellent energy storage performance. The fibers are made of Ti(3)C(2)T(x)MXene/carbon nanotubes (MXene/CNT) hybrid and exhibit high strength, good conductivity, and excellent energy storage performance. The hybrid fibers can be used to make high-performance textile-based energy storage devices.
Mechanically strong and electrically conducting fibers, particularly those with high specific capacitances, are promising fiber-shaped electrodes for fiber-and textile-based energy storage devices like fiber-shaped super -capacitors (FSCs). However, a high loading of fillers or bridging agents is commonly required to fabricate fiber electrodes with good mechanical strength, which compromises electrical conductivity and energy storage performance. Herein, an easily scalable wet-spinning strategy is reported to fabricate multifunctional Ti(3)C(2)T(x )MXene/carbon nanotubes (MXene/CNT) hybrid fibers from a harmonious mixture of MXene and CNT in water and using acetic acid as a coagulation bath. The hybrid fiber achieved high strength (61 +/- 7 MPa), good conductivity (1142.08 +/- 40.04 S cm(-1)) and excellent energy storage performance (-295 F g(-1) at 5 mV s(- 1)) at a very low CNT content of-1 wt%. When CNT loading increased to-9 wt%, the maximum strain at broken reached 161 +/- 19 MPa and conductivity further increased to 1715 +/- 22 S cm(-1). The excellent mechanical performance allows hybrid fibers to be knitted into textiles for energy storage textiles. The assembled FSCs exhibit energy and power densities of-6.08 mW h cm(-3) and-6440 mW cm(-3,) respectively. The excellent performance of MXene/ CNT fiber and good feasibility for scalable production will open up new opportunities for the development of wearable and textile-based devices in the near future.
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