期刊
COMPOSITES PART B-ENGINEERING
卷 166, 期 -, 页码 74-85出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.compositesb.2018.11.116
关键词
Copper oxide (CuO); Cobalt oxide Co3O4; N-doped MWCNT; Hybrid composite; Supercapacitor
资金
- Basic Science Research Program through the National Research Foundation of Korea [NRF-2017R1D1A1B03028368]
- Ministry of Education
Nanosheet-like structures of copper cobaltite (CuO/Co2O4) decorated on N-MWCNT electrodes were synthesized through hydrothermal process in the presence of ammonia/urea. The structural and morphological properties were characterized by Raman, XRD, XPS, SEM, SEM-EDX and FE-TEM analysis. The electrochemical properties of the CuO/Co2O4@N-MWCNT hybrid electrodes were studied using cyclic voltammetry, galvanostatic charge - discharge, and electrochemical impedance analyses. The prepared CuO/Co2O4@N-MWCNT and CuO@NMWCNT electrodes showed a specific capacitance of similar to 246 Fg(-1) and 100 Fg(-1) at a current density of 0.5 Ag-1 for three electrode assembly. Further, the asymmetric cells also fabricated and it delivered the highest specific capacitance of 268 Fg(-1) and 279 Fg(-1) for CuO@N-MWCNT and CuO/Co2O4@N-MWCNT electrodes respectively. These electrodes possessed very good capacitance behavior with 89% retention even after 5000 cycles at 0.5Ag(-1) which overlay a way to use as promising candidates for the high-performance supercapacitors.
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