期刊
JOURNAL OF ALLOYS AND COMPOUNDS
卷 875, 期 -, 页码 -出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jallcom.2021.160074
关键词
CeO2; Symmetric supercapacitor; Energy storage; ZIF-8
资金
- Korea Institute of Energy Technology Evaluation and Planning (KETEP)
- Ministry of Trade, Industry & Energy (MOTIE) of the Republic of Korea [20184030202260]
- National Research Foundation of Korea (NRF) - Korea government (MSIT) [2019R1F1A1063622]
- R&D Program for Forest Science Technology by Korean Forest Service (Korean Forestry Promotion Institute) [FTIS2020214D10-2022-AC01]
- Korea Evaluation Institute of Industrial Technology (KEIT) [20184030202260] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
Developed a well-organized composite material based on rare earth metals for potential use as electrodes in high-performance supercapacitors. Through experimentation, the hierarchical nano-polyhedrons showed promising applications in energy storage with excellent capacitance and cyclic stability.
A well-organized composites based on crustal abundance rare earth metal were developed as the potential electrode for high-performance supercapacitors. The new category of hierarchical nano-polyhedrons of cerium (Ce) doped ZIF-8 composite electrodes were prepared through wet-chemical strategy by varying the concentrations of Ce precursors and determined for their plausible applications in supercapacitors. The XRD and SEM results revealed the structural stability and morphological activity of the prepared composites and then investigated overall energy storage performance. The synthesized composite electrode of Ce-MOF-0.5 using 0.5 mM Ce source with ZIF-8 framework delivered the maximum capacitance of 424.2 F.g(-1) by the three-electrode measurement. The optimized Ce-MOF-0.5 electrode incorporated symmetric supercapacitor cell offered an excellent capacitive behavior with the capacitance 132 F.g(-1) @ 1 A.g(-1), and the device retains the 90% of capacitance upon 5000 cycles during charging-discharging cycles. Further, asymmetric supercapacitor device performance has been assessed and the device delivers high capacitance (89 F.g(-1) @ 1 A.g(-1)), higher energy density (31.3 W.h.kg(-1) @ 800 W.kg(-1)) and indicating higher electrochemical performance of the Ce-MOF-0.5//AC device. (C) 2021 Elsevier B.V. All rights reserved.
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