Lithium‐Ion Batteries Containing Surfactants for the Protection of Graphite Anode against the Passivation Layer Byproducts
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...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
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Wiley-VCH
2023-07-01
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| Series: | ChemElectroChem |
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| Online Access: | https://doi.org/10.1002/celc.202300102 |
| _version_ | 1797788562622513152 |
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| author | Dr. Fabien Chrétien Dr. Georgios Nikiforidis Dr. Christine Damas Prof. Mérièm Anouti |
| author_facet | Dr. Fabien Chrétien Dr. Georgios Nikiforidis Dr. Christine Damas Prof. Mérièm Anouti |
| author_sort | Dr. Fabien Chrétien |
| collection | DOAJ |
| description | 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. |
| first_indexed | 2024-03-13T01:37:23Z |
| format | Article |
| id | doaj.art-ef55c8900f354ec3838eb8fd90aa2574 |
| institution | Directory Open Access Journal |
| issn | 2196-0216 |
| language | English |
| last_indexed | 2024-03-13T01:37:23Z |
| publishDate | 2023-07-01 |
| publisher | Wiley-VCH |
| record_format | Article |
| series | ChemElectroChem |
| spelling | doaj.art-ef55c8900f354ec3838eb8fd90aa25742023-07-04T03:28:49ZengWiley-VCHChemElectroChem2196-02162023-07-011013n/an/a10.1002/celc.202300102Lithium‐Ion Batteries Containing Surfactants for the Protection of Graphite Anode against the Passivation Layer ByproductsDr. Fabien Chrétien0Dr. Georgios Nikiforidis1Dr. Christine Damas2Prof. Mérièm Anouti3Laboratoire PCM2E Université de Tours Parc de Grandmont 37200 Tours FranceInstitute for Materials Discovery University College London Malet Place WC1E 7JE London UKLaboratoire PCM2E Université de Tours Parc de Grandmont 37200 Tours FranceLaboratoire PCM2E Université de Tours Parc de Grandmont 37200 Tours FranceAbstract 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.https://doi.org/10.1002/celc.202300102graphitelithium saltsolid electrolyte interfacesurfactantselectrolyte |
| spellingShingle | Dr. Fabien Chrétien Dr. Georgios Nikiforidis Dr. Christine Damas Prof. Mérièm Anouti Lithium‐Ion Batteries Containing Surfactants for the Protection of Graphite Anode against the Passivation Layer Byproducts ChemElectroChem graphite lithium salt solid electrolyte interface surfactants electrolyte |
| title | Lithium‐Ion Batteries Containing Surfactants for the Protection of Graphite Anode against the Passivation Layer Byproducts |
| title_full | Lithium‐Ion Batteries Containing Surfactants for the Protection of Graphite Anode against the Passivation Layer Byproducts |
| title_fullStr | Lithium‐Ion Batteries Containing Surfactants for the Protection of Graphite Anode against the Passivation Layer Byproducts |
| title_full_unstemmed | Lithium‐Ion Batteries Containing Surfactants for the Protection of Graphite Anode against the Passivation Layer Byproducts |
| title_short | Lithium‐Ion Batteries Containing Surfactants for the Protection of Graphite Anode against the Passivation Layer Byproducts |
| title_sort | lithium ion batteries containing surfactants for the protection of graphite anode against the passivation layer byproducts |
| topic | graphite lithium salt solid electrolyte interface surfactants electrolyte |
| url | https://doi.org/10.1002/celc.202300102 |
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