Influence of carbon substrate on the electrochemical performance of carbon/manganese oxide hybrids in aqueous and organic electrolytes
- Manganese oxide presents very promising electrochemical properties as an electrode material in supercapacitors, but there remain important open questions to guide further development of the complex manganese oxide/carbon/electrolyte system. Our work addresses specifically the influence of carbon ordering and the difference between outer and inner porosity of carbon particles for the application in aqueous 1 M Na2SO4 and 1 M LiClO4 in acetonitrile. Birnessite-type manganese oxide was hydrothermally hybridized on two kinds of carbon onions with only outer surface area and different electrical conductivity, and conventional activated carbon with a high inner porosity. Carbon onions with a high degree of carbon ordering, high conductivity, and high outer surface area were identified as the most promising material, yielding 179 F g-1. Pore blocking in activated carbon yields unfavorable electrochemical performances. The highest specific energy of 16.4 W h kg-1 was measured for a symmetric full-cell arrangement of manganese oxide coated high temperature carbon onions in the organic electrolyte. High stability during 10 000 cycles was achieved for asymmetric full-cells, which proved as a facile way to enhance the electrochemical performance stability.
Document Type: | Article |
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Author: | Marco ZeigerORCiD, Simon FleischmannORCiD, Benjamin KrunerORCiD, Aura TolosaORCiD, Stephan Bechtel, Mathias Baltes, Anna Schreiber, Riko Moroni, Severin Vierrath, Simon ThieleORCiD, Volker PresserORCiD |
URN: | urn:nbn:de:bsz:291:415-5049 |
DOI: | https://doi.org/10.1039/c6ra24181f |
ISSN: | 2046-2069 |
Parent Title (English): | RSC Advances |
Volume: | 6 |
Issue: | 109 |
First Page: | 107163 |
Last Page: | 107179 |
Publisher: | The Royal Society of Chemistry |
Language: | English |
Year of first Publication: | 2016 |
Date of final exam: | 2016/10/25 |
Release Date: | 2022/11/18 |
Impact: | 03.108 (2016) |
Scientific Units: | Energy Materials |
Open Access: | Open Access |
Signature: | INM 2016/112 |
Licence (German): | ![]() |