Nanoscale Morphological Changes at Lithium Interface, Triggered by the Electrolyte Composition and Electrochemical Cycling
Understanding the electrochemical and morphological properties of the Li-electrolyte interface plays a central role in the implementation of metallic Li in safe and efficient electrochemical energy storage. The current study explores the influence of soluble polysulfides (PS) and lithium nitrate (Li...
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| Format: | Article |
| Language: | English |
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Wiley
2019-01-01
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| Series: | Journal of Chemistry |
| Online Access: | http://dx.doi.org/10.1155/2019/4102382 |
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| _version_ | 1849306512608985088 |
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| author | Sebastian Mai Janine Wessel Anna Dimitrova Michael Stich Svetlozar Ivanov Stefan Krischok Andreas Bund |
| author_facet | Sebastian Mai Janine Wessel Anna Dimitrova Michael Stich Svetlozar Ivanov Stefan Krischok Andreas Bund |
| author_sort | Sebastian Mai |
| collection | DOAJ |
| description | Understanding the electrochemical and morphological properties of the Li-electrolyte interface plays a central role in the implementation of metallic Li in safe and efficient electrochemical energy storage. The current study explores the influence of soluble polysulfides (PS) and lithium nitrate (LiNO3) on the characteristics of the solid electrolyte interphase (SEI) layer, formed spontaneously on the Li surface, prior to electrochemical cycling. Special attention is paid to the evolution of the electrochemical impedance and nanoscale morphology of the interface, influenced by the contact time and electrolyte composition. The basic tools applied in this investigation are electrochemical impedance spectroscopy (EIS), atomic force microscopy (AFM) performed at the nanoscale, and X-ray photoelectron spectroscopy (XPS). The individual addition of polysulfides and LiNO3 increases the interface resistance, while the simultaneous application of these components is beneficial, reducing the SEI resistive behavior. The electrochemical cycling of Li in nonmodified 1,2-dimethoxy ethane (DME) and tetraethylene glycol dimethyl ether (TEGDME) based electrolytes leads to slight morphological changes, compared to the pristine Li pattern. In contrast, we found that in the presence of PS and LiNO3, the interface displays a rough and inhomogeneous morphology. |
| format | Article |
| id | doaj-art-372d362ec1414afcbe693bf222c835f3 |
| institution | Kabale University |
| issn | 2090-9063 2090-9071 |
| language | English |
| publishDate | 2019-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Journal of Chemistry |
| spelling | doaj-art-372d362ec1414afcbe693bf222c835f32025-08-20T03:55:02ZengWileyJournal of Chemistry2090-90632090-90712019-01-01201910.1155/2019/41023824102382Nanoscale Morphological Changes at Lithium Interface, Triggered by the Electrolyte Composition and Electrochemical CyclingSebastian Mai0Janine Wessel1Anna Dimitrova2Michael Stich3Svetlozar Ivanov4Stefan Krischok5Andreas Bund6Electrochemistry and Electroplating Group, Technische Universität Ilmenau, Ilmenau 98693, GermanyElectrochemistry and Electroplating Group, Technische Universität Ilmenau, Ilmenau 98693, GermanyInstitute of Physics and Institute of Micro- and Nanotechnologies MacroNano, Technische Universität Ilmenau, PF 100565, 98684 Ilmenau, GermanyElectrochemistry and Electroplating Group, Technische Universität Ilmenau, Ilmenau 98693, GermanyElectrochemistry and Electroplating Group, Technische Universität Ilmenau, Ilmenau 98693, GermanyInstitute of Physics and Institute of Micro- and Nanotechnologies MacroNano, Technische Universität Ilmenau, PF 100565, 98684 Ilmenau, GermanyElectrochemistry and Electroplating Group, Technische Universität Ilmenau, Ilmenau 98693, GermanyUnderstanding the electrochemical and morphological properties of the Li-electrolyte interface plays a central role in the implementation of metallic Li in safe and efficient electrochemical energy storage. The current study explores the influence of soluble polysulfides (PS) and lithium nitrate (LiNO3) on the characteristics of the solid electrolyte interphase (SEI) layer, formed spontaneously on the Li surface, prior to electrochemical cycling. Special attention is paid to the evolution of the electrochemical impedance and nanoscale morphology of the interface, influenced by the contact time and electrolyte composition. The basic tools applied in this investigation are electrochemical impedance spectroscopy (EIS), atomic force microscopy (AFM) performed at the nanoscale, and X-ray photoelectron spectroscopy (XPS). The individual addition of polysulfides and LiNO3 increases the interface resistance, while the simultaneous application of these components is beneficial, reducing the SEI resistive behavior. The electrochemical cycling of Li in nonmodified 1,2-dimethoxy ethane (DME) and tetraethylene glycol dimethyl ether (TEGDME) based electrolytes leads to slight morphological changes, compared to the pristine Li pattern. In contrast, we found that in the presence of PS and LiNO3, the interface displays a rough and inhomogeneous morphology.http://dx.doi.org/10.1155/2019/4102382 |
| spellingShingle | Sebastian Mai Janine Wessel Anna Dimitrova Michael Stich Svetlozar Ivanov Stefan Krischok Andreas Bund Nanoscale Morphological Changes at Lithium Interface, Triggered by the Electrolyte Composition and Electrochemical Cycling Journal of Chemistry |
| title | Nanoscale Morphological Changes at Lithium Interface, Triggered by the Electrolyte Composition and Electrochemical Cycling |
| title_full | Nanoscale Morphological Changes at Lithium Interface, Triggered by the Electrolyte Composition and Electrochemical Cycling |
| title_fullStr | Nanoscale Morphological Changes at Lithium Interface, Triggered by the Electrolyte Composition and Electrochemical Cycling |
| title_full_unstemmed | Nanoscale Morphological Changes at Lithium Interface, Triggered by the Electrolyte Composition and Electrochemical Cycling |
| title_short | Nanoscale Morphological Changes at Lithium Interface, Triggered by the Electrolyte Composition and Electrochemical Cycling |
| title_sort | nanoscale morphological changes at lithium interface triggered by the electrolyte composition and electrochemical cycling |
| url | http://dx.doi.org/10.1155/2019/4102382 |
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