期刊
MATERIALS RESEARCH BULLETIN
卷 126, 期 -, 页码 -出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.materresbull.2020.110817
关键词
CuCo2O4; Heterostructures; High surface area; Asymmetric supercapacitor; High stability
资金
- Department of Science and Technology - Science and Engineering Research Board, New Delhi, India (DST-SERB-EMR) [EMR/2016/007280]
- Chikkaiah Naicker College (Affiliated to Bharathiar University), Erode, Tamilnadu, India
A facile, controllable and low cost hydrothermal method has been used to fabricate CuCo2O4 nanorods (CCN) CuCo2O4 nanorods@PPy nanowires (CCNP) arrays on Ni foam. The impressive heterostructures are favorable to shortening the paths ion/electron diffusion, giving a superior specific surface area and revealing richer electroactive sites. The electrochemical properties are tested in three-and two-electrode configurations, signifying a better specific capacitance and a long-term cycling stability. Remarkably, the CCNP heterostructure electrode exhibits an excellent value of 2272 Fg(-1) at 2 Ag-1. The specific capacitance retention is almost 91 and 96 % for CCN and CCNP electrodes at 20 Ag-1 after 5000 cycle. Extremely, the optimized CuCo2O4@PPy//AC ASC cell is cycled reversibly in a wide voltage region as high as 1.4 V and exhibits a specific capacitance of 91 Fg(-1) even at a high current density of 20 Ag-1 with a maximum energy density of 52 Wh kg(-1).
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