3D Architecturing Strategy on the Utmost Carbon Nanotube Fiber for Ultra-High Performance Fiber-Shaped Supercapacitor

Authors
Kim, Jeong-GilYu, HayoungJung, Jae YoungKim, Min JiJeon, Dae-YoungJeong, Hyeon SuKim, Nam Dong
Issue Date
2022-07
Publisher
John Wiley & Sons Ltd.
Citation
Advanced Functional Materials, v.32, no.28
Abstract
Fiber-shaped supercapacitors (FSSCs) are the most state-of-the-art power supplies suitable for wearable devices, but the intrinsically limited cylindrical space of fibers restricts their high electrochemical performance, which must be overcome with a delicate and systematic architectural process. Here, a simple but effective 3D architectural strategy for fabricating FSSCs with high performance and flexibility is proposed. Highly conductive liquid crystal spun carbon nanotube fiber (CNTF) is an excellent 1D core fiber for the electrophoretic deposition of graphene oxide (GO). The deposited GO forms a vertical 3D structure on the CNTF (VG@CNTF), which can be successfully preserved by a consecutive coating of pseudocapacitive active materials onto the surface of VG. Notably, a solid-state asymmetric FSSC shows an outstanding performance of 65 Wh kg(-1) at 100 kW kg(-1) and exceptional stability and flexibility (capacitance retention of 98.60% at bending angles of 90 degrees and 93.1% after 5000 bending cycles). This work can provide new insight into the development of high-performance FSSCs for practical wearable applications.
Keywords
REDUCED GRAPHENE OXIDE; DOUBLE HYDROXIDE NANOSHEETS; ALL-SOLID-STATE; FABRICATION; ELECTRODE; FILM; 3D fiber electrodes; carbon nanotube fibers; electrochemical deposition; fiber-shaped supercapacitors; vertical graphene oxide structures; wearable energy storage devices
ISSN
1616-301X
URI
https://pubs.kist.re.kr/handle/201004/114942
DOI
10.1002/adfm.202113057
Appears in Collections:
KIST Article > 2022
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