Journal
JOURNAL OF ALLOYS AND COMPOUNDS
Volume 828, Issue -, Pages -Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jallcom.2019.153622
Keywords
Graphene; Supercapacitor; Fiber; Molybdenum disulfide
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Funding
- Natural Science Foundation of Shanghai [19ZR1435000]
- Basic Research Project of Shanghai [19JC1410402]
- Innovation Program of Shanghai Municipal Education [2019-01-07-00-07-E00015]
- Thousand Talents Program of Shanghai
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Flexible fiber-shaped supercapacitors have broad application prospects in wearable and portable electronics and smart textiles, however, often suffered from their relatively low capacitance and energy density. In this paper, a unique core-shell fiber composed of graphene fiber and radially-aligned molybdenum disulfide nanosheet arrays (GF/MoS2) has been rationally designed and prepared. The morphology and structure of well-designed core-shell fibers were studied by Raman, X-ray diffraction (XRD), scanning electron microscope (SEM) and energy-dispersive x-ray spectroscopic (EDX) elemental mapping. All-solid-state, fiber-shaped symmetric supercapacitors were constructed by packaging two parallel GF/MoS2 core-shell fibers with PVA/H2SO4 electrolyte. Owing to the synergistic effects between graphene and MoS2, the fiber-shaped supercapacitor exhibits an enhanced areal capacitance up to 189.73 mF cm(-2) and a high energy density of 14.665 mu W h cm(-2). The fibrous supercapacitors also exhibit good stability and flexibility. This work provides a strategy to design core-shell fibrous electrodes for high performance fiber-shaped supercapacitors, which also holds great potential for future flexible electronic devices. (c) 2020 Elsevier B.V. All rights reserved.
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