Fabricating high-capacity electrode materials toward supercapacitors has attracted increasing attention. Here we report a three-dimensional CNTs/NiCoS nanocomposite material synthesized successfully by a facile one-step hydrothermal technique. As expected, a CNTs/NiCoS electrode shows remarkable capacitive properties with a high specific capacitance of 890 C g at 1 A g. It also demonstrates excellent cycle stability with an 83.5% capacitance retention rate after 5000 cycles at 10 A g. Importantly, when assembled into a asymmetric supercapacitor, it exhibits a high energy density (43.3 W h kg) and power density (800 W kg). The exceptional electrochemical capacity is attributed to the structural features, refined grains, and enhanced conductivity. The above results indicate that CNTs/NiCoS composite electrode materials have great potential application in energy-storage devices.
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| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC9723539 | PMC |
| http://dx.doi.org/10.1039/d2ra06796j | DOI Listing |
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