Nanocomposite LiCoO2/activated corncob carbon as electrode materials for improving the electrochemical properties of an asymmetric supercapacitor
Nanocomposite LiCoO2/activated corncob carbon (referred to as LC/CAC or LCC) was synthesized via a sol–gel-calcination route. CAC loading significantly affected the pore size, surface area, and electrochemical performance of LCC. X-ray results revealed a pure hexagonal phase of LC in LCC. Field emis...
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| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Elsevier
2025-07-01
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| Series: | Results in Physics |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S2211379725002116 |
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| Summary: | Nanocomposite LiCoO2/activated corncob carbon (referred to as LC/CAC or LCC) was synthesized via a sol–gel-calcination route. CAC loading significantly affected the pore size, surface area, and electrochemical performance of LCC. X-ray results revealed a pure hexagonal phase of LC in LCC. Field emission scanning electron microscopy displayed the irregular granules and platelets of LC, grooved surfaces of CAC with internal cavities, and LC on the surfaces of CAC. LC/CAC with 3 g of CAC loading (designated as LCC3) showed the greatest specific capacitance (Csc), 913F/g at 0.5 A/g and 98.9 % capacity retention after a 5000-cycle test. The assembled asymmetric supercapacitor (ASC), using CAC as an anode and LCC3 as a cathode, demonstrated good performance over a broad voltage range of 1.3 V with a specific cell capacitance (Csc, cell) of 40.03F/g and capacity retention of 88.42 % after a 5000-cycle test at 1 A/g. Moreover, at 0.5 A/g, the device also demonstrated an energy density of 9.92 Wh/kg at a power density of 203.56 W/kg. The improved electrochemical performance of the ASC is presented based on the electrical double layer capacitor and the pseudocapacitive behavior of LCC. |
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| ISSN: | 2211-3797 |