Chretien, Fabien;
Nikiforidis, Georgios;
Damas, Christine;
Anouti, Meriem;
(2023)
Lithium-Ion Batteries Containing Surfactants for the Protection of Graphite Anode against the Passivation Layer Byproducts.
ChemElectroChem
, Article e202300102. 10.1002/celc.202300102.
(In press).
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Abstract
The electrolyte is an essential component of all electrochemical devices, including lithium-ion batteries (LIBs). During the initial charging process, a portion of the electrolyte (usually a mixture of organic solvents and lithium salts) decomposes at the anode surface, forming a thin layer of solid electrolyte interface (SEI). This study examines the physicochemical properties of three surfactants: lithium dodecyl sulfate (LiDS), polyoxyethylene ether Forafac 1110D (LiF1110), and lithium perfluoro octanesulfonate Forafac 1185D (LiFOS). Initially, their thermal properties (surface tension and contact angle) are determined. Then, electrochemical tests (cyclic voltammetry, galvanostatic charge-discharge cycling, and electrochemical impedance spectroscopy) followed by ex-situ X-ray photoelectron spectroscopy (XPS) measurements on the graphite anodes in a standard electrolyte ethylene carbonate/propylene carbonate/3 dimethyl carbonate +1 mol L−1 LiPF6 are conducted to compare the surfactants′ action according to their chemical structure, as well as their effect on the interface properties of the formed SEI. The results indicate that surfactants improve electrode interfaces due to their amphiphilic character, preventing the harmful effects of passivation layer salts (LiF, LiOH, Li2O, etc.) that deposit on the graphite interfaces. The three surfactants affect the cycling behavior and performance of the half-cells differently depending on their ionic or nonionic nature and the polarity or non-polarity of the salt (e. g., lithium fluoride LiF, lithium oxide Li2O), with LiF1110 demonstrating the best performance.
| Type: | Article |
|---|---|
| Title: | Lithium-Ion Batteries Containing Surfactants for the Protection of Graphite Anode against the Passivation Layer Byproducts |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1002/celc.202300102 |
| Publisher version: | https://doi.org/10.1002/celc.202300102 |
| Language: | English |
| Additional information: | © 2023 The Authors. ChemElectroChem published by Wiley-VCH GmbH This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited. |
| Keywords: | Science & Technology, Physical Sciences, Electrochemistry, graphite, lithium salt, solid electrolyte interface, surfactants, electrolyte, SOLID-ELECTROLYTE INTERPHASE, SEI, SALTS, DECOMPOSITION, TEMPERATURE, SOLUBILITY, MORPHOLOGY, CATHODE, CHARGE, LITDI |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > MAPS Faculty Office UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > MAPS Faculty Office > Institute for Materials Discovery |
| URI: | https://discovery.ucl.ac.uk/id/eprint/10172472 |
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