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Electric potential ...
Electric potential gradient at the buried interface between Lithium-ion battery electrodes and the SEI observed using photoelectron spectroscopy
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- Maibach, Julia (author)
- Uppsala universitet,Strukturkemi
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- Lindgren, Fredrik (author)
- Uppsala universitet,Strukturkemi
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- Eriksson, Henrik (author)
- Uppsala universitet,Strukturkemi
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- Edström, Kristina (author)
- Uppsala universitet,Strukturkemi
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- Hahlin, Maria (author)
- Uppsala universitet,Molekyl- och kondenserade materiens fysik
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(creator_code:org_t)
- 2016-04-27
- 2016
- English.
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In: The Journal of Physical Chemistry Letters. - : American Chemical Society (ACS). - 1948-7185. ; 7:10, s. 1775-1780
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https://doi.org/10.1...
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https://pubs.acs.org...
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https://urn.kb.se/re...
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Abstract
Subject headings
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- The buried interface between the bulk electrode material and the solid electrolyte interphase (SEI) in cycled Li-ion battery anodes is suggested to incorporate an electric potential gradient. This suggestion is based on photoelectron spectroscopy (PES) results from different anode materials that all show relative binding energy shifts between the components of the SEI and the active anode. Implications of this electric potential gradient on binding energy reference points in PES as well as on charge-transfer kinetics in Li-ion batteries are discussed. Specifically, we show that the separation of surface layer and bulk material spectral contributions (depth profiling) is crucial for consistent data interpretation. We conclude that previous interpretations of lithiation as cause for changes in PES spectra may need to be revised.
Subject headings
- NATURVETENSKAP -- Kemi -- Materialkemi (hsv//swe)
- NATURAL SCIENCES -- Chemical Sciences -- Materials Chemistry (hsv//eng)
Publication and Content Type
- ref (subject category)
- art (subject category)
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