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Stabilization of Li...
Stabilization of Li-Rich Disordered Rocksalt Oxyfluoride Cathodes by Particle Surface Modification
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- Naylor, Andrew J. (author)
- Uppsala universitet,Strukturkemi
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- Källquist, Ida (author)
- Uppsala universitet,Molekyl- och kondenserade materiens fysik
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- Peralta, David (author)
- Univ Grenoble Alpes, CEA LITEN, F-38054 Grenoble 9, France.
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- Martin, Jean-Frederic (author)
- Univ Grenoble Alpes, CEA LITEN, F-38054 Grenoble 9, France.
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- Boulineau, Adrien (author)
- Univ Grenoble Alpes, CEA LITEN, F-38054 Grenoble 9, France.
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- Colin, Jean-Francois (author)
- Univ Grenoble Alpes, CEA LITEN, F-38054 Grenoble 9, France.
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- Baur, Christian (author)
- Helmholtz Inst Ulm, D-89081 Ulm, Germany.
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- Chable, Johann (author)
- Helmholtz Inst Ulm, D-89081 Ulm, Germany.
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- Fichtner, Maximilian (author)
- Helmholtz Inst Ulm, D-89081 Ulm, Germany.;Karlsruhe Inst Technol, Inst Nanotechnol, D-76021 Karlsruhe, Germany.
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- Edström, Kristina, Professor, 1958- (author)
- Uppsala universitet,Strukturkemi
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- Hahlin, Maria (author)
- Uppsala universitet,Strukturkemi
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- Brandell, Daniel, 1975- (author)
- Uppsala universitet,Strukturkemi
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(creator_code:org_t)
- 2020-05-29
- 2020
- English.
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In: ACS Applied Energy Materials. - : AMER CHEMICAL SOC. - 2574-0962. ; 3:6, s. 5937-5948
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Abstract
Subject headings
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- Promising theoretical capacities and high voltages are offered by Li-rich disordered rocksalt oxyfluoride materials as cathodes in lithium-ion batteries. However, as has been discovered for many other Li-rich materials, the oxyfluorides suffer from extensive surface degradation, leading to severe capacity fading. In the case of Li2VO2F, we have previously determined this to be a result of detrimental reactions between an unstable surface layer and the organic electrolyte. Herein, we present the protection of Li2VO2F particles with AIF(3) surface modification, resulting in a much-enhanced capacity retention over 50 cycles. While the specific capacity for the untreated material drops below 100 mA h g(-1) after only 50 cycles, the treated materials retain almost 200 mA h g(-1) . Photoelectron spectroscopy depth profiling confirms the stabilization of the active material surface by the surface modification and reveals its suppression of electrolyte decomposition.
Subject headings
- NATURVETENSKAP -- Kemi -- Materialkemi (hsv//swe)
- NATURAL SCIENCES -- Chemical Sciences -- Materials Chemistry (hsv//eng)
Keyword
- lithium-ion batteries
- Li-rich cathodes
- disordered rocksalt
- particle coatings
- surface modifications
- surface passivation
- photoelectron spectroscopy
Publication and Content Type
- ref (subject category)
- art (subject category)
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Naylor, Andrew J ...
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Källquist, Ida
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Peralta, David
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Martin, Jean-Fre ...
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Boulineau, Adrie ...
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Colin, Jean-Fran ...
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Baur, Christian
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Chable, Johann
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Fichtner, Maximi ...
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Edström, Kristin ...
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Hahlin, Maria
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Brandell, Daniel ...
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- About the subject
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- NATURAL SCIENCES
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NATURAL SCIENCES
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and Chemical Science ...
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and Materials Chemis ...
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ACS Applied Ener ...
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Uppsala University