Effect of surface preparation and R-group size on the stabilization of lithium metal anodes with silanes
Identifieur interne : 000917 ( Main/Exploration ); précédent : 000916; suivant : 000918Effect of surface preparation and R-group size on the stabilization of lithium metal anodes with silanes
Auteurs : Susanna Neuhold [États-Unis] ; David J. Schroeder [États-Unis] ; John T. Vaughey [États-Unis]Source :
- Journal of power sources [ 0378-7753 ] ; 2012.
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- topic : Soufre.
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Abstract
As new applications for lithium-ion batteries emerge into the marketplace, a new emphasis is being placed on developing higher capacity electrodes. Two of the higher capacity technologies under development are lithium-sulfur and lithium-air batteries, both of which, in most configurations, use a lithium metal anode. Building on our previous work extending the cycle life of lithium metal anodes via surface functionalization with silane groups, we have identified two separate regimes for the cycle life enhancements based on size of the silane R-groups. Very small R-groups (TMS) and R-groups bulkier than triphenyl show enhanced cycle life compared to control samples while R-groups between these in size show reduced cycle life. Additionally, we present a comparison between different cleaning methods to optimize the hydroxyl functionalized layer on the lithium metal and the influence of these methods on the stability of lithium metal in EC:EMC electrolyte. A solvent based cleaning approach is shown to substantially improve stability when combined with chlorotrimethyl silane treatment.
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Le document en format XML
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<term>Coatings</term>
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<term>Electrolyte</term>
<term>Electromagnetic compatibility</term>
<term>Lithium</term>
<term>Lithium battery</term>
<term>Lithium-air battery</term>
<term>Secondary cell</term>
<term>Sulfur</term>
<term>Surface preparation</term>
<term>Thulium sulfides</term>
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<keywords scheme="Pascal" xml:lang="fr"><term>Préparation surface</term>
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<term>Batterie lithium</term>
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<term>Compatibilité électromagnétique</term>
<term>Electrolyte</term>
<term>Accumulateur électrochimique</term>
<term>Revêtement</term>
<term>Lithium</term>
<term>Soufre</term>
<term>Sulfure de thulium</term>
<term>TmS</term>
<term>Batterie lithium-air</term>
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<front><div type="abstract" xml:lang="en">As new applications for lithium-ion batteries emerge into the marketplace, a new emphasis is being placed on developing higher capacity electrodes. Two of the higher capacity technologies under development are lithium-sulfur and lithium-air batteries, both of which, in most configurations, use a lithium metal anode. Building on our previous work extending the cycle life of lithium metal anodes via surface functionalization with silane groups, we have identified two separate regimes for the cycle life enhancements based on size of the silane R-groups. Very small R-groups (TMS) and R-groups bulkier than triphenyl show enhanced cycle life compared to control samples while R-groups between these in size show reduced cycle life. Additionally, we present a comparison between different cleaning methods to optimize the hydroxyl functionalized layer on the lithium metal and the influence of these methods on the stability of lithium metal in EC:EMC electrolyte. A solvent based cleaning approach is shown to substantially improve stability when combined with chlorotrimethyl silane treatment.</div>
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