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Stable and Unstable...
Stable and Unstable Diglyme-Based Electrolytes for Batteries with Sodium or Graphite as Electrode
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- Goktas, Mustafa (författare)
- Friedrich Schiller Univ Jena, Inst Tech Chem & Environm Chem, Philosophenweg 7a, D-07743 Jena, Germany;Ctr Energy & Environm Chem Jena CEEC Jena, Philosophenweg 7a, D-07743 Jena, Germany
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- Bolli, Christoph (författare)
- Paul Scherrer Inst, Electrochem Lab, CH-5232 Villigen, Switzerland
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- Buchheim, Johannes (författare)
- Friedrich Schiller Univ Jena, Inst Tech Chem & Environm Chem, Philosophenweg 7a, D-07743 Jena, Germany;Ctr Energy & Environm Chem Jena CEEC Jena, Philosophenweg 7a, D-07743 Jena, Germany
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- Berg, Erik (författare)
- Uppsala universitet,Strukturkemi
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- Novak, Petr (författare)
- Paul Scherrer Inst, Electrochem Lab, CH-5232 Villigen, Switzerland
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- Bonilla, Francisco (författare)
- CIC Energigune Parque Tecnol, C Albert Einstein 48, Vitoria 01510, Alava, Spain
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- Rojo, Teofilo (författare)
- CIC Energigune Parque Tecnol, C Albert Einstein 48, Vitoria 01510, Alava, Spain
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- Komaba, Shinichi (författare)
- Tokyo Univ Sci, Dept Appl Chem, Shinjuku Ku, 1-3 Kagurazaka, Tokyo 1628061, Japan
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- Kubota, Kei (författare)
- Tokyo Univ Sci, Dept Appl Chem, Shinjuku Ku, 1-3 Kagurazaka, Tokyo 1628061, Japan
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- Adelhelm, Philipp (författare)
- Friedrich Schiller Univ Jena, Inst Tech Chem & Environm Chem, Philosophenweg 7a, D-07743 Jena, Germany;Ctr Energy & Environm Chem Jena CEEC Jena, Philosophenweg 7a, D-07743 Jena, Germany
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(creator_code:org_t)
- 2019
- 2019
- Engelska.
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Ingår i: ACS Applied Materials and Interfaces. - 1944-8244 .- 1944-8252. ; 11:36, s. 32844-32855
- Relaterad länk:
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https://urn.kb.se/re...
Abstract
Ämnesord
Stäng
- We study the stability of several diglyme-based electrolytes in sodium|sodium and sodium|graphite cells. The electrolyte behavior for different conductive salts [sodium trifluoromethanesulfonate (NaOTf), NaPF6, NaClO4, bis(fluorosulfonyl)imide (NaFSI), and sodium bis(trifluoromethanesulfonyl)imide (NaTFSI)] is compared and, in some cases, considerable differences are identified. Side reactions are studied with a variety of methods, including X-ray diffraction, scanning electron microscopy, transmission electron microscopy, online electrochemical mass spectrometry, and in situ electrochemical dilatometry. For Na|Na symmetric cells as well as for Na|graphite cells, we find that NaOTf and NaPF6 are the preferred salts followed by NaClO4 and NaFSI, as the latter two lead to more side reactions and increasing impedance. NaTFSI shows the worst performance leading to poor Coulombic efficiency and cycle life. In this case, excessive side reactions lead also to a strong increase in electrode thickness during cycling. In a qualitative order, the suitability of the conductive salts can be ranked as follows: NaOTf >= NaPF6 > NaClO4 > NaFSI >> NaTFSI. Our results also explain two recent, seemingly conflicting findings on the degree of solid electrolyte interphase formation on graphite electrodes in sodium-ion batteries [Maibach, J.; ACS Appl. Mater. Interfaces 2017, 9, 12373-12381; Goktas, M.; Adv. Energy Mater. 2018, 8, 1702724]. The contradictory findings are due to the different conductive salts used in both studies.
Ämnesord
- NATURVETENSKAP -- Kemi -- Oorganisk kemi (hsv//swe)
- NATURAL SCIENCES -- Chemical Sciences -- Inorganic Chemistry (hsv//eng)
- NATURVETENSKAP -- Fysik -- Den kondenserade materiens fysik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Condensed Matter Physics (hsv//eng)
Nyckelord
- sodium-ion batteries
- diglyme-based electrolytes
- OEMS
- dilatometry
- conductive salts
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Goktas, Mustafa
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Bolli, Christoph
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Buchheim, Johann ...
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Berg, Erik
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Novak, Petr
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Bonilla, Francis ...
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visa fler...
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Rojo, Teofilo
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Komaba, Shinichi
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Kubota, Kei
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Adelhelm, Philip ...
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och Kemi
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