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Consequences of air...
Consequences of air exposure on the lithiated graphite SEI
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- Malmgren, Sara (författare)
- Uppsala universitet,Strukturkemi
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- Ciosek, Katarzyna (författare)
- Uppsala universitet,Strukturkemi
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- Lindblad, Rebecka (författare)
- Uppsala universitet,Molekyl- och kondenserade materiens fysik
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- Plogmaker, Stefan (författare)
- Uppsala universitet,Molekyl- och kondenserade materiens fysik
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- Kühn, Julius (författare)
- Uppsala universitet,Institutionen för kemi - Ångström,Institutionen för fysik och astronomi,Molekyl- och kondenserade materiens fysik
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- Rensmo, Håkan (författare)
- Uppsala universitet,Molekyl- och kondenserade materiens fysik
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- Edström, Kristina, 1958- (författare)
- Uppsala universitet,Strukturkemi
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- Hahlin, Maria (författare)
- Uppsala universitet,Strukturkemi
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(creator_code:org_t)
- Elsevier BV, 2013
- 2013
- Engelska.
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Ingår i: Electrochimica Acta. - : Elsevier BV. - 0013-4686 .- 1873-3859. ; 105, s. 83-91
- Relaterad länk:
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https://doi.org/10.1...
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https://doi.org/10.1...
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https://urn.kb.se/re...
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https://doi.org/10.1...
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https://urn.kb.se/re...
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Abstract
Ämnesord
Stäng
- In the present work, consequences of air exposure on the surface composition of one of the most reactive lithium-ion battery components, the lithiated graphite, was investigated using 280-835 eV soft X-ray photoelectron spectroscopy (SOXPES) as well as 1486.7 eV X-ray photoelectron spectroscopy (XPS) (similar to 2 and similar to 10 nm probing depth, respectively). Different depth regions of the solid electrolyte interphase (SEI) of graphite cycled vs. LiFePO4 were thereby examined. Furthermore, the air sensitivity of samples subject to four different combinations of pre-treatments (washed/unwashed and exposed to air before or after vacuum treatment) was explored. The samples showed important changes after exposure to air, which were found to be largely dependent on sample pre-treatment. Changes after exposure of unwashed samples exposed before vacuum treatment were attributed to reactions involving volatile species. On washed, air exposed samples, as well as unwashed samples exposed after vacuum treatment, effects attributed to lithium hydroxide formation in the innermost SEI were observed and suggested to be associated with partial delithiation of the surface region of the lithiated graphite electrode. Moreover, effects that can be attributed to LiPF6 decomposition were observed. However, these effects were less pronounced than those attributed to reactions involving solvent species and the lithiated graphite.
Ämnesord
- NATURVETENSKAP -- Kemi -- Materialkemi (hsv//swe)
- NATURAL SCIENCES -- Chemical Sciences -- Materials Chemistry (hsv//eng)
Nyckelord
- XPS
- SEI
- Graphite
- Air
- LiPF6
- Chemistry with specialization in Materials Chemistry
Publikations- och innehållstyp
- ref (ämneskategori)
- art (ämneskategori)
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