Surface Oxidation of Nano-Silicon as a Method for Cycle Life Enhancement of Li-ion Active Materials
Among the many studied Li-ion active materials, silicon presents the highest specific capacity, however it suffers from a great volume change during lithiation. In this work, we present two methods for the chemical modification of silicon nanoparticles. Both methods change the materials’ electrochem...
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MDPI AG
2020-09-01
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Series: | Molecules |
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Online Access: | https://www.mdpi.com/1420-3049/25/18/4093 |
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author | Maciej Ratynski Bartosz Hamankiewicz Dominika A. Buchberger Andrzej Czerwinski |
author_facet | Maciej Ratynski Bartosz Hamankiewicz Dominika A. Buchberger Andrzej Czerwinski |
author_sort | Maciej Ratynski |
collection | DOAJ |
description | Among the many studied Li-ion active materials, silicon presents the highest specific capacity, however it suffers from a great volume change during lithiation. In this work, we present two methods for the chemical modification of silicon nanoparticles. Both methods change the materials’ electrochemical characteristics. The combined XPS and SEM results show that the properties of the generated silicon oxide layer depend on the modification procedure employed. Electrochemical characterization reveals that the formed oxide layers show different susceptibility to electro-reduction during the first lithiation. The single step oxidation procedure resulted in a thin and very stable oxide that acts as an artificial SEI layer during electrode operation. The removal of the native oxide prior to further reactions resulted in a very thick oxide layer formation. The created oxide layers (both thin and thick) greatly suppress the effect of silicon volume changes, which significantly reduces electrode degradation during cycling. Both modification techniques are relatively straightforward and scalable to an industrial level. The proposed modified materials reveal great applicability prospects in next generation Li-ion batteries due to their high specific capacity and remarkable cycling stability. |
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issn | 1420-3049 |
language | English |
last_indexed | 2024-03-10T16:30:28Z |
publishDate | 2020-09-01 |
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series | Molecules |
spelling | doaj.art-2aab87e82f4841a59dc2fe4dd40b3a802023-11-20T12:53:56ZengMDPI AGMolecules1420-30492020-09-012518409310.3390/molecules25184093Surface Oxidation of Nano-Silicon as a Method for Cycle Life Enhancement of Li-ion Active MaterialsMaciej Ratynski0Bartosz Hamankiewicz1Dominika A. Buchberger2Andrzej Czerwinski3Faculty of Chemistry, University of Warsaw, Pasteura 1, 02-093 Warsaw, PolandFaculty of Chemistry, University of Warsaw, Pasteura 1, 02-093 Warsaw, PolandFaculty of Chemistry, University of Warsaw, Pasteura 1, 02-093 Warsaw, PolandFaculty of Chemistry, University of Warsaw, Pasteura 1, 02-093 Warsaw, PolandAmong the many studied Li-ion active materials, silicon presents the highest specific capacity, however it suffers from a great volume change during lithiation. In this work, we present two methods for the chemical modification of silicon nanoparticles. Both methods change the materials’ electrochemical characteristics. The combined XPS and SEM results show that the properties of the generated silicon oxide layer depend on the modification procedure employed. Electrochemical characterization reveals that the formed oxide layers show different susceptibility to electro-reduction during the first lithiation. The single step oxidation procedure resulted in a thin and very stable oxide that acts as an artificial SEI layer during electrode operation. The removal of the native oxide prior to further reactions resulted in a very thick oxide layer formation. The created oxide layers (both thin and thick) greatly suppress the effect of silicon volume changes, which significantly reduces electrode degradation during cycling. Both modification techniques are relatively straightforward and scalable to an industrial level. The proposed modified materials reveal great applicability prospects in next generation Li-ion batteries due to their high specific capacity and remarkable cycling stability.https://www.mdpi.com/1420-3049/25/18/4093Li-ionsiliconoxidationsilicon oxidecycle life |
spellingShingle | Maciej Ratynski Bartosz Hamankiewicz Dominika A. Buchberger Andrzej Czerwinski Surface Oxidation of Nano-Silicon as a Method for Cycle Life Enhancement of Li-ion Active Materials Molecules Li-ion silicon oxidation silicon oxide cycle life |
title | Surface Oxidation of Nano-Silicon as a Method for Cycle Life Enhancement of Li-ion Active Materials |
title_full | Surface Oxidation of Nano-Silicon as a Method for Cycle Life Enhancement of Li-ion Active Materials |
title_fullStr | Surface Oxidation of Nano-Silicon as a Method for Cycle Life Enhancement of Li-ion Active Materials |
title_full_unstemmed | Surface Oxidation of Nano-Silicon as a Method for Cycle Life Enhancement of Li-ion Active Materials |
title_short | Surface Oxidation of Nano-Silicon as a Method for Cycle Life Enhancement of Li-ion Active Materials |
title_sort | surface oxidation of nano silicon as a method for cycle life enhancement of li ion active materials |
topic | Li-ion silicon oxidation silicon oxide cycle life |
url | https://www.mdpi.com/1420-3049/25/18/4093 |
work_keys_str_mv | AT maciejratynski surfaceoxidationofnanosiliconasamethodforcyclelifeenhancementofliionactivematerials AT bartoszhamankiewicz surfaceoxidationofnanosiliconasamethodforcyclelifeenhancementofliionactivematerials AT dominikaabuchberger surfaceoxidationofnanosiliconasamethodforcyclelifeenhancementofliionactivematerials AT andrzejczerwinski surfaceoxidationofnanosiliconasamethodforcyclelifeenhancementofliionactivematerials |