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Charge storage mech...
Charge storage mechanism of α-MnO2 in protic and aprotic ionic liquid electrolytes
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- Lindberg, Simon, 1987 (författare)
- Chalmers tekniska högskola,Chalmers University of Technology,Chalmers Univ Technol, Dept Phys, S-41296 Gothenburg, Sweden.
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- Jeschke, Steffen, 1986 (författare)
- Chalmers tekniska högskola,Chalmers University of Technology,Chalmers Univ Technol, Dept Phys, S-41296 Gothenburg, Sweden.
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- Jankowski, Piotr, 1990 (författare)
- Politechnika Warszawska,Warsaw University of Technology,Danmarks Tekniske Universitet,Technical University of Denmark,Tech Univ Denmark, Dept Energy Convers & Storage, DK-2800 Lyngby, Denmark.;Warsaw Univ Technol, Fac Chem, PL-00664 Warsaw, Poland.
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- Abdelhamid, Muhammad, 1987 (författare)
- Uppsala universitet,Strukturkemi,Uppsala University
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- Brousse, T. (författare)
- Université de Nantes,Nantes University,Centre national de la recherche scientifique (CNRS),Univ Nantes, Inst Mat Jean Rouxel, CNRS, UMR 6502, F-44322 Nantes 3, France.;CNRS FR 3459, Reseau Stockage Electrochim Energie, F-80039 Amiens, France.
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- Le Bideau, J. (författare)
- Centre national de la recherche scientifique (CNRS),Université de Nantes,Nantes University,Univ Nantes, Inst Mat Jean Rouxel, CNRS, UMR 6502, F-44322 Nantes 3, France.;CNRS FR 3459, Reseau Stockage Electrochim Energie, F-80039 Amiens, France.
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- Johansson, Patrik, 1969 (författare)
- Chalmers tekniska högskola,Chalmers University of Technology,Chalmers Univ Technol, Dept Phys, S-41296 Gothenburg, Sweden.
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- Matic, Aleksandar, 1968 (författare)
- Chalmers tekniska högskola,Chalmers University of Technology,Chalmers Univ Technol, Dept Phys, S-41296 Gothenburg, Sweden.
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Chalmers tekniska högskola Chalmers Univ Technol, Dept Phys, S-41296 Gothenburg, Sweden (creator_code:org_t)
- Elsevier BV, 2020
- 2020
- Engelska.
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Ingår i: Journal of Power Sources. - : Elsevier BV. - 0378-7753 .- 1873-2755. ; 460
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Abstract
Ämnesord
Stäng
- In this work we have investigated the charge storage mechanism of MnO2 electrodes in ionic liquid electrolytes. We show that by using an ionic liquid with a cation that has the ability to form hydrogen bonds with the active material (MnO2) on the surface of the electrode, a clear faradaic contribution is obtained. This situation is found for ionic liquids with cations that have a low pKa, i.e. protic ionic liquids. For a protic ionic liquid, the specific capacity at low scan rate rates can be explained by a densely packed layer of cations that are in a standing geometry, with a proton directly interacting through a hydrogen bond with the surface of the active material in the electrode. In contrast, for aprotic ionic liquids there is no interaction and only a double layer contribution to the charge storage is observed. However, by adding an alkali salt to the aprotic ionic liquid, a faradaic contribution is obtained from the insertion of Li+ into the surface of the MnO2 electrode. No effect can be observed when Li+ is added to the protic IL, suggesting that a densely packed cation layer in this case prevent Li-ions from reaching the active material surface.
Ämnesord
- NATURVETENSKAP -- Kemi -- Oorganisk kemi (hsv//swe)
- NATURAL SCIENCES -- Chemical Sciences -- Inorganic Chemistry (hsv//eng)
- NATURVETENSKAP -- Kemi -- Fysikalisk kemi (hsv//swe)
- NATURAL SCIENCES -- Chemical Sciences -- Physical Chemistry (hsv//eng)
- NATURVETENSKAP -- Fysik -- Annan fysik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Other Physics Topics (hsv//eng)
- NATURVETENSKAP -- Kemi -- Annan kemi (hsv//swe)
- NATURAL SCIENCES -- Chemical Sciences -- Other Chemistry Topics (hsv//eng)
- NATURVETENSKAP -- Fysik -- Den kondenserade materiens fysik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Condensed Matter Physics (hsv//eng)
Nyckelord
- Ionic liquid
- Hybrid
- Supercapacitor
- MnO2
- Protic
Publikations- och innehållstyp
- art (ämneskategori)
- ref (ämneskategori)
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