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Analysis of the Sol...
Analysis of the Solid Electrolyte Interphase on Hard Carbon Electrodes in Sodium-Ion Batteries
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- Carboni, Marco (author)
- Uppsala universitet,Strukturkemi
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- Manzi, Jessica (author)
- Univ Roma La Sapienza, Dipartimento Chim, Rome, Italy
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- Armstrong, Antony Robert (author)
- Univ St Andrews, Sch Chem, EaStCHEM, St Andrews, Fife, Scotland
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- Billaud, Juliette (author)
- Univ St Andrews, Sch Chem, EaStCHEM, St Andrews, Fife, Scotland
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- Brutti, Sergio (author)
- Univ Roma La Sapienza, Dipartimento Chim, Rome, Italy
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- Younesi, Reza (author)
- Uppsala universitet,Strukturkemi
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(creator_code:org_t)
- 2019-02-07
- 2019
- English.
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In: ChemElectroChem. - : Wiley. - 2196-0216. ; 6:6, s. 1745-1753
- Related links:
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https://iris.uniroma...
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https://urn.kb.se/re...
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https://doi.org/10.1...
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Abstract
Subject headings
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- The composition, morphology, and evolution of the solid electrolyte interphase (SEI) formed on hard carbon (HC) electrodes upon cycling in sodium‐ion batteries are investigated. A microporous HC was prepared by pyrolysis of d‐(+)‐glucose at 1000 °C followed by ball‐milling. HC electrodes were galvanostatically cycled at room temperature in sodium‐ion half‐cells using an aprotic electrolyte of 1 m sodium bis(trifluoromethanesulfonyl)imide dissolved in propylene carbonate with 3 wt % fluoroethylene carbonate additive. The evolution of the electrode/electrolyte interface was studied by impedance spectroscopy upon cycling and ex situ by spectroscopy and microscopy. The irreversible capacity displayed by the HC electrodes in the first galvanostatic cycle is probably due to the accumulation of redox inactive NaxC phases and the precipitation of a porous, organic‐inorganic hybrid SEI layer over the HC electrodes. This passivation film further evolves in morphology and composition upon cycling and stabilizes after approximately ten galvanostatic cycles at low current rates.
Subject headings
- NATURVETENSKAP -- Kemi -- Materialkemi (hsv//swe)
- NATURAL SCIENCES -- Chemical Sciences -- Materials Chemistry (hsv//eng)
Keyword
- electrodes
- hard carbon
- materials
- sodium-ion batteries
- solid electrolyte interphase
Publication and Content Type
- ref (subject category)
- art (subject category)
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