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Solid Electrolyte I...
Solid Electrolyte Interphase (SEI) Formation on the Graphite Anode in Electrolytes Containing the Anion Receptor Tris(hexafluoroisopropyl)borate (THFIPB)
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- Tezel, Ahmet Oguz (författare)
- Norwegian Univ Sci & Technol, Dept Mat Sci & Engn, N-7491 Trondheim, Norway.;Paul Scherrer Inst, Electrochem Lab, CH-5232 Villigen, Switzerland.
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- Streich, Daniel Klaus (författare)
- Paul Scherrer Inst, Electrochem Lab, CH-5232 Villigen, Switzerland.
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- Gueguen, Aurelie (författare)
- Paul Scherrer Inst, Electrochem Lab, CH-5232 Villigen, Switzerland.
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- Hahlin, Maria (författare)
- Uppsala universitet,Molekyl- och kondenserade materiens fysik
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- Sunde, Svein (författare)
- Norwegian Univ Sci & Technol, Dept Mat Sci & Engn, N-7491 Trondheim, Norway.
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- Edström, Kristina, Professor, 1958- (författare)
- Uppsala universitet,Strukturkemi
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- Novak, Petr (författare)
- Paul Scherrer Inst, Electrochem Lab, CH-5232 Villigen, Switzerland.
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- Svensson, Ann Mari (författare)
- Norwegian Univ Sci & Technol, Dept Mat Sci & Engn, N-7491 Trondheim, Norway.
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Norwegian Univ Sci & Technol, Dept Mat Sci & Engn, N-7491 Trondheim, Norway;Paul Scherrer Inst, Electrochem Lab, CH-5232 Villigen, Switzerland. Paul Scherrer Inst, Electrochem Lab, CH-5232 Villigen, Switzerland. (creator_code:org_t)
- 2020-09-14
- 2020
- Engelska.
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Ingår i: Journal of the Electrochemical Society. - : ELECTROCHEMICAL SOC INC. - 0013-4651 .- 1945-7111. ; 167:13
- Relaterad länk:
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http://epc.ub.uu.se/...
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https://ntnuopen.ntn...
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https://urn.kb.se/re...
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https://doi.org/10.1...
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Abstract
Ämnesord
Stäng
- Addition of small amounts of tris(hexafluoroisopropyl)borate (THFIPB) has previously been shown to improve the capacity of graphite anodes in a wide temperature window during long-term cycling in electrolytes based on LiPF(6)in ethylene carbonate (EC) and diethylene carbonate (DMC) solvents. Here, we demonstrate that the addition of THFIPB accelerates the LiPF(6)hydrolysis, and consumes residual water. The SEI formation and composition was studied by operando electrochemical mass spectrometry (OEMS), X-ray photoelectron spectroscopy (XPS), and ex situ diffuse reflectance spectroscopy (DRIFT). Differences in the surface products are observed for the THFIPB containing electrolyte already upon exposure of graphite anodes to the electrolyte. Both the mechanism and the kinetics of the EC reduction reaction are affected, as evidenced by the shift in the C(2)H(4)evolution peak to higher potentials as compared to the reference electrolyte. Addition of THFIPB leads to formation of a SEI layer enriched in inorganic components; salt reduction products at high potentials, and inorganic carbonate at lower potentials. The SEI formed is more conductive but slightly less passivating. The SEI formed in the reference electrolyte is dominated by organic compounds, also at high potentials, facilitated by the trace amounts of water inevitably found in the electrolyte.
Ämnesord
- NATURVETENSKAP -- Kemi -- Materialkemi (hsv//swe)
- NATURAL SCIENCES -- Chemical Sciences -- Materials Chemistry (hsv//eng)
- NATURVETENSKAP -- Kemi -- Oorganisk kemi (hsv//swe)
- NATURAL SCIENCES -- Chemical Sciences -- Inorganic Chemistry (hsv//eng)
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