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Highly Concentrated...
Highly Concentrated LiTFSI-EC Electrolytes for Lithium Metal Batteries
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- Nilsson, Viktor, 1985 (author)
- Uppsala universitet,Strukturkemi,Chalmers Univ Technol, Dept Phys, SE-41296 Gothenburg, Sweden; CNRS, FR 3104, Hub Energie, ALISTORE European Res Inst, 15 Rue Baudelocque, F-80039 Amiens, France
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- Kotronia, Antonia (author)
- Uppsala universitet,Strukturkemi
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- Lacey, Matthew (author)
- Uppsala universitet,Strukturkemi
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- Edström, Kristina, Professor, 1958- (author)
- Uppsala universitet,Strukturkemi,CNRS, FR 3104, Hub Energie, ALISTORE European Res Inst, 15 Rue Baudelocque, F-80039 Amiens, France
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- Johansson, Patrik, 1969 (author)
- Alistore - European Research Institute,Chalmers tekniska högskola,Chalmers University of Technology,Chalmers Univ Technol, Dept Phys, SE-41296 Gothenburg, Sweden; CNRS, FR 3104, Hub Energie, ALISTORE European Res Inst, 15 Rue Baudelocque, F-80039 Amiens, France
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(creator_code:org_t)
- 2019-12-04
- 2020
- English.
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In: ACS Applied Energy Materials. - : American Chemical Society (ACS). - 2574-0962. ; 3:1, s. 200-207
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Abstract
Subject headings
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- Concentrated electrolytes have the potential to increase the stability for batteries with lithium metal anodes. In this study, liquid electrolytes were created by mixing ethylene carbonate (EC), a solid at room temperature, with a high concentration of LiTFSI salt. The binary LiTFSI-EC highly concentrated electrolytes have the benefit of extremely low volatility as compared to conventional organic electrolytes and also allow for cycling vs Li metal anodes. Using a LiTFSI-EC electrolyte with molar ratio 1:6, the Coulombic efficiency for Li plating/stripping on Cu is 97% at a current density of 1 mA cm-2 with a 2 mAh cm-2 capacity, pointing to a practically useful performance. In a full cell setup using a commercial LiFePO4 (LFP) cathode, the efficiency is maintained, proving compatibility. In comparison to other carbonate-based electrolytes, there is less accumulation of decomposition products on the surface of a cycled Li film, which in part explains the improved cycle life. In all, this electrolyte system shows promise in terms of electrochemical stability and may allow for safe Li metal batteries due to the inherent physical stability.
Subject headings
- NATURVETENSKAP -- Kemi -- Oorganisk kemi (hsv//swe)
- NATURAL SCIENCES -- Chemical Sciences -- Inorganic Chemistry (hsv//eng)
- NATURVETENSKAP -- Kemi -- Materialkemi (hsv//swe)
- NATURAL SCIENCES -- Chemical Sciences -- Materials Chemistry (hsv//eng)
- TEKNIK OCH TEKNOLOGIER -- Kemiteknik -- Annan kemiteknik (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Chemical Engineering -- Other Chemical Engineering (hsv//eng)
- NATURVETENSKAP -- Fysik -- Annan fysik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Other Physics Topics (hsv//eng)
Keyword
- anode free
- safe electrolyte
- Li metal anode
- highly concentrated electrolyte
- ethylene carbonate
Publication and Content Type
- art (subject category)
- ref (subject category)
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