Journal
CHEMICAL ENGINEERING JOURNAL
Volume 417, Issue -, Pages -Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.cej.2020.127927
Keywords
Molybdenum disulfide; FeCo-based electrode; Array; Defect; Flexible asymmetric supercapacitor
Categories
Funding
- National Natural Science Foundation of China [51603092]
- China Postdoctoral Science Foundation [2019T120393]
- Natural Science Foundation of Jiangsu Province [BK20160537]
- young talents program of Jiangsu University, High-tech Research Key laboratory of Zhenjiang [SS2018002]
- Priority Academic Program Development of Jiangsu Higher Education Institutions
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A novel flexible supercapacitor electrode material with excellent specific capacitance and cycling stability was reported in this study, showing high energy density and power density at 1 A g(-1). The self-assembled all-solid-state supercapacitor device demonstrated good flexibility without significant electrochemical properties attenuation.
Although flexible supercapacitors have important applications, the development of high-performance flexible supercapacitors still remains a critical challenge owing to the low ion diffusion rate, poor electro-conductivity, and limited active defect sites. Herein, we report the first amorphous MoSx nanoparticles grown on crystalline FeCo-based nanoneedles (FC@MS-EG) via an ethylene glycol-induced strategy. The FC@MS-EG electrode presents an unprecedented specific capacitance of 1956 F g(-1) at 1 A g(-1) and over 91.1% of capacitance retention even after 6000 cycles because of the unique morphology, the rich defect sites, the high carrier concentration. The FC@MS-EG//AC asymmetric supercapacitor delivers an ultrahigh specific capacitance of 282 F g(-1) at 1 A g(-1) and an excellent energy density of 88.09 Wh kg(-1) along with a power density of 750 W kg(-1). And the self-assembled flexible all-solid-state supercapacitor device can be easily bent and twisted with negligible electrochemical properties attenuation.
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