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Explanation of anom...
Explanation of anomalous rate capability enhancement by manganese oxide incorporation in carbon nanofiber electrodes for electrochemical capacitors
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- Li, Qi, 1990 (författare)
- Chalmers tekniska högskola,Chalmers University of Technology
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- Kuzmenko, Volodymyr, 1987 (författare)
- Chalmers tekniska högskola,Chalmers University of Technology
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- Haque, Mohammad Mazharul, 1984 (författare)
- Chalmers tekniska högskola,Chalmers University of Technology
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- Di, Mengqiao, 1994 (författare)
- Chalmers tekniska högskola,Chalmers University of Technology
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- Smith, Anderson David, 1985 (författare)
- Chalmers tekniska högskola,Chalmers University of Technology
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- Lundgren, Per, 1968 (författare)
- Chalmers tekniska högskola,Chalmers University of Technology
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- Enoksson, Peter, 1957 (författare)
- Chalmers tekniska högskola,Chalmers University of Technology
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(creator_code:org_t)
- Elsevier BV, 2020
- 2020
- Engelska.
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Ingår i: Electrochimica Acta. - : Elsevier BV. - 0013-4686. ; 340
- Relaterad länk:
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https://research.cha...
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https://doi.org/10.1...
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Abstract
Ämnesord
Stäng
- Electrochemical capacitors (ECs) can provide ultra-long cycle life and ultra-fast energy delivery, characteristics which most battery technologies lack. Making composites out of carbon and pseudocapacitive materials is a popular strategy directed on narrowing the gap in energy density with regard to batteries. Usually, the incorporation of pseudocapacitive materials leads to a decrease in power performance compared to a pure carbon matrix, due to inferior electrical conductivity. This work, however, presents significant improvement in rate capability demonstrated by a composite electrode containing carbon nanofibers (NCNF) and manganese oxides (MnO2). The NCNF/MnO2 is prepared with a common method through the reaction with permanganate. The material has excellent performance metrics, especially a 78.2% rate capability (capacitance retention at 15 A g−1 relative to 0.5 A g−1), more than 10 times that for the NCNF carbon matrix. The exceptional enhancement can be explained by the development of micropores and surface area of NCNF, thus alleviating the “pore starvation” issue, and surface functional groups variation that enhances capacitive performance. This work highlights the importance of paying attention to the modification of carbon substrate when investigating carbon composite electrodes e.g. carbon/MnO2 networks.
Ämnesord
- NATURVETENSKAP -- Kemi -- Oorganisk kemi (hsv//swe)
- NATURAL SCIENCES -- Chemical Sciences -- Inorganic Chemistry (hsv//eng)
- NATURVETENSKAP -- Kemi -- Materialkemi (hsv//swe)
- NATURAL SCIENCES -- Chemical Sciences -- Materials Chemistry (hsv//eng)
- TEKNIK OCH TEKNOLOGIER -- Materialteknik -- Kompositmaterial och -teknik (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Materials Engineering -- Composite Science and Engineering (hsv//eng)
Nyckelord
- Porosity
- MnO 2
- Surface functional group
- Supercapacitor
- Rate capability
- Carbon nanofiber
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Li, Qi, 1990
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Kuzmenko, Volody ...
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Haque, Mohammad ...
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Di, Mengqiao, 19 ...
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Smith, Anderson ...
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Lundgren, Per, 1 ...
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visa fler...
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Enoksson, Peter, ...
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- Om ämnet
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- NATURVETENSKAP
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NATURVETENSKAP
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och Kemi
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och Oorganisk kemi
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- NATURVETENSKAP
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NATURVETENSKAP
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och Kemi
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och Materialkemi
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- TEKNIK OCH TEKNOLOGIER
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TEKNIK OCH TEKNO ...
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och Materialteknik
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och Kompositmaterial ...
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Electrochimica A ...
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Chalmers tekniska högskola