期刊
JOURNAL OF MATERIALS CHEMISTRY A
卷 6, 期 20, 页码 9592-9603出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c8ta01931b
关键词
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资金
- National Research Foundation of Korea (NRF) - Korea government (MSIP) [2015R1A4A1041746]
Herein, we propose a novel scalable and ascendant strategy to design a CoMoS@Co(OH)(2) core-shell architecture possessing a CoMoS nanorod core and Co(OH)(2) nanoflakes as the shell layer wall for flexible all-solid-state supercapacitor application. The surface architecture and material properties of the prepared material are characterized by electron microscopy, X-ray diffraction, and X-ray photoelectron spectroscopy. Experimental analysis verifies that the nano-porous core-shell CoMoS@Co(OH)(2) architecture is strongly interconnected with the carbon cloth, ensuring sufficiently porous nanostructures. The core-shell CoMoS@Co(OH)(2) architecture exhibits a high capacitance of 1711 F g(-1) at a current density of 20 mA cm(-2), demonstrating a powerful synergistic effect efficiently using all of the desired functions of each material constituent. Finally, a flexible all-solid-state supercapacitor is fabricated using CoMoS@Co(OH)(2) and activated carbon as electrodes (CoMoS@Co(OH)(2)//AC) and a polymer-based gel electrolyte. The fabricated flexible CoMoS@Co(OH)(2)//AC asymmetric supercapacitor device delivers an energy density of 58.1 W h kg(-1) over the voltage range of 0-2 V with a capacitance retention of 91.47% after 8000 cycles. The illumination of a red light-emitting diode for more than 1.5 min is experimentally confirmed using a single solid-state CoMoS@Co(OH)(2)//AC supercapacitor. These advantages indicate the considerable potential that the core-shell CoMoS@Co(OH)(2) architecture possesses for commercial applications.
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