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Initial SEI formati...
Initial SEI formation in LiBOB-, LiDFOB- and LiBF4-containing PEO electrolytes
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- Andersson, Edvin K. W. (author)
- Uppsala universitet,Strukturkemi
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- Wu, Liang-Ting (author)
- Natl Taiwan Univ Sci & Technol, Dept Chem Engn, Taipei 106, Taiwan.
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- Bertoli, Luca (author)
- Dipartimento Chim Materiali & Ingn Chim Giulio Nat, Dipartimento Chim Mat & Ingn Chim Giulio Natta, Via Luigi Mancinelli 7, I-20131 Milan, Italy.
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- Weng, Yi-Chen (author)
- Uppsala universitet,Energimaterialens fysik
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- Friesen, Daniel (author)
- Uppsala universitet,Strukturkemi
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- Elbouazzaoui, Kenza (author)
- Uppsala universitet,Strukturkemi
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- Bloch, Sophia (author)
- Uppsala universitet,Institutionen för kemi - Ångström
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- Ovsyannikov, Ruslan (author)
- Helmholtz Zentrum Berlin Mat & Energie, Inst Methods & Instrumentat Synchrotron Radiat Res, Albert Einstein Str 15, D-12489 Berlin, Germany.
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- Giangrisostomi, Erika (author)
- Helmholtz Zentrum Berlin Mat & Energie, Inst Methods & Instrumentat Synchrotron Radiat Res, Albert Einstein Str 15, D-12489 Berlin, Germany.
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- Brandell, Daniel, 1975- (author)
- Uppsala universitet,Strukturkemi
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- Mindemark, Jonas (author)
- Uppsala universitet,Strukturkemi
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- Jiang, Jyh-Chiang (author)
- Natl Taiwan Univ Sci & Technol, Dept Chem Engn, Taipei 106, Taiwan.
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- Hahlin, Maria (author)
- Uppsala universitet,Strukturkemi,Energimaterialens fysik
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(creator_code:org_t)
- Royal Society of Chemistry, 2024
- 2024
- English.
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In: Journal of Materials Chemistry A. - : Royal Society of Chemistry. - 2050-7488 .- 2050-7496. ; 12:15, s. 9184-9199
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Abstract
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- A limiting factor for solid polymer electrolyte (SPE)-based Li-batteries is the functionality of the electrolyte decomposition layer that is spontaneously formed at the Li metal anode. A deeper understanding of this layer will facilitate its improvement. This study investigates three SPEs – polyethylene oxide:lithium tetrafluoroborate (PEO:LiBF4), polyethylene oxide:lithium bis(oxalate)borate (PEO:LiBOB), and polyethylene oxide:lithium difluoro(oxalato)borate (PEO:LiDFOB) – using a combination of electrochemical impedance spectroscopy (EIS), galvanostatic cycling, in situ Li deposition photoelectron spectroscopy (PES), and ab initio molecular dynamics (AIMD) simulations. Through this combination, the cell performance of PEO:LiDFOB can be connected to the initial SPE decomposition at the anode interface. It is found that PEO:LiDFOB had the highest capacity retention, which is correlated to having the least decomposition at the interface. This indicates that the lower SPE decomposition at the interface still creates a more effective decomposition layer, which is capable of preventing further electrolyte decomposition. Moreover, the PES results indicate formation of polyethylene in the SEI in cells based on PEO electrolytes. This is supported by AIMD that shows a polyethylene formation pathway through free-radical polymerization of ethylene.
Subject headings
- NATURVETENSKAP -- Kemi -- Materialkemi (hsv//swe)
- NATURAL SCIENCES -- Chemical Sciences -- Materials Chemistry (hsv//eng)
- NATURVETENSKAP -- Kemi -- Fysikalisk kemi (hsv//swe)
- NATURAL SCIENCES -- Chemical Sciences -- Physical Chemistry (hsv//eng)
- TEKNIK OCH TEKNOLOGIER -- Kemiteknik -- Polymerteknologi (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Chemical Engineering -- Polymer Technologies (hsv//eng)
Publication and Content Type
- ref (subject category)
- art (subject category)
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- By the author/editor
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Andersson, Edvin ...
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Wu, Liang-Ting
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Bertoli, Luca
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Weng, Yi-Chen
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Friesen, Daniel
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Elbouazzaoui, Ke ...
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show more...
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Bloch, Sophia
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Ovsyannikov, Rus ...
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Giangrisostomi, ...
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Brandell, Daniel ...
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Mindemark, Jonas
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Jiang, Jyh-Chian ...
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Hahlin, Maria
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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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- NATURAL SCIENCES
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NATURAL SCIENCES
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and Chemical Science ...
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and Physical Chemist ...
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- ENGINEERING AND TECHNOLOGY
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ENGINEERING AND ...
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and Chemical Enginee ...
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and Polymer Technolo ...
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Journal of Mater ...
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Uppsala University