Porous MCM‐41 Silica Materials as Scaffolds for Silicon‐based Lithium‐ion Battery Anodes
Abstract Aiming for specific energy improvements, lithium‐ion battery (LIB) research explores Si based materials as potential alternatives for the negative electrode/anode. Si exhibits a high specific capacity when lithiated, accompanied by a large volumetric expansion. To mitigate expansion induced...
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| Format: | Article |
| Language: | English |
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Wiley-VCH
2024-04-01
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| Series: | ChemElectroChem |
| Subjects: | |
| Online Access: | https://doi.org/10.1002/celc.202300707 |
| _version_ | 1797222104587829248 |
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| author | Michael Karl Dr. Alena Kalyakina Dr. Christoph Dräger Dr. Stefan Haufe Prof. Dr. Simone Pokrant |
| author_facet | Michael Karl Dr. Alena Kalyakina Dr. Christoph Dräger Dr. Stefan Haufe Prof. Dr. Simone Pokrant |
| author_sort | Michael Karl |
| collection | DOAJ |
| description | Abstract Aiming for specific energy improvements, lithium‐ion battery (LIB) research explores Si based materials as potential alternatives for the negative electrode/anode. Si exhibits a high specific capacity when lithiated, accompanied by a large volumetric expansion. To mitigate expansion induced failures, composite materials with finely distributed Si inside a scaffold have been established. Potential scaffolds to create such Si composites are nano porous SiO2 materials, such as MCM‐41. MCM‐41 exhibits a fine nanostructure, and the synthesis allows precise tuning of the pore properties and thus, after filling with Si, of Si morphology and Si content in the composite. In this work, insights into relevant MCM‐41 synthesis parameters are acquired, with special attention towards specific pore volumes and pore sizes of the SiO2 powders. Materials characterization is performed using nitrogen sorption analysis, X‐ray scattering, electron microscopy and thermogravimetric analysis. Selected MCM‐41 scaffolds are processed to Si composites and integrated into LIB electrodes. The specific capacity and the stability of the Si−SiO2 composites are evaluated by PITT and galvanostatic cycling. They show capacities above 800 mAh g−1, i. e. more than twice the specific capacity of industry standard graphite, and last over 200 charge/discharge cycles before their capacity loss exceeds 25 %. |
| first_indexed | 2024-04-24T13:16:02Z |
| format | Article |
| id | doaj.art-6cc7616ec53f4739b18032ef4657679b |
| institution | Directory Open Access Journal |
| issn | 2196-0216 |
| language | English |
| last_indexed | 2024-04-24T13:16:02Z |
| publishDate | 2024-04-01 |
| publisher | Wiley-VCH |
| record_format | Article |
| series | ChemElectroChem |
| spelling | doaj.art-6cc7616ec53f4739b18032ef4657679b2024-04-04T17:37:37ZengWiley-VCHChemElectroChem2196-02162024-04-01117n/an/a10.1002/celc.202300707Porous MCM‐41 Silica Materials as Scaffolds for Silicon‐based Lithium‐ion Battery AnodesMichael Karl0Dr. Alena Kalyakina1Dr. Christoph Dräger2Dr. Stefan Haufe3Prof. Dr. Simone Pokrant4Chemie und Physik der Materialien Universität Salzburg Jakob-Haringer-Strasse 2a 5020 Salzburg AustriaConsortium für elektrochemische Industrie Wacker Chemie AG Zielstattstraße 20 81379 München GermanyConsortium für elektrochemische Industrie Wacker Chemie AG Zielstattstraße 20 81379 München GermanyConsortium für elektrochemische Industrie Wacker Chemie AG Zielstattstraße 20 81379 München GermanyChemie und Physik der Materialien Universität Salzburg Jakob-Haringer-Strasse 2a 5020 Salzburg AustriaAbstract Aiming for specific energy improvements, lithium‐ion battery (LIB) research explores Si based materials as potential alternatives for the negative electrode/anode. Si exhibits a high specific capacity when lithiated, accompanied by a large volumetric expansion. To mitigate expansion induced failures, composite materials with finely distributed Si inside a scaffold have been established. Potential scaffolds to create such Si composites are nano porous SiO2 materials, such as MCM‐41. MCM‐41 exhibits a fine nanostructure, and the synthesis allows precise tuning of the pore properties and thus, after filling with Si, of Si morphology and Si content in the composite. In this work, insights into relevant MCM‐41 synthesis parameters are acquired, with special attention towards specific pore volumes and pore sizes of the SiO2 powders. Materials characterization is performed using nitrogen sorption analysis, X‐ray scattering, electron microscopy and thermogravimetric analysis. Selected MCM‐41 scaffolds are processed to Si composites and integrated into LIB electrodes. The specific capacity and the stability of the Si−SiO2 composites are evaluated by PITT and galvanostatic cycling. They show capacities above 800 mAh g−1, i. e. more than twice the specific capacity of industry standard graphite, and last over 200 charge/discharge cycles before their capacity loss exceeds 25 %.https://doi.org/10.1002/celc.202300707SiO2NanostructuresMCM-41Chemical vapor depositionAnode material |
| spellingShingle | Michael Karl Dr. Alena Kalyakina Dr. Christoph Dräger Dr. Stefan Haufe Prof. Dr. Simone Pokrant Porous MCM‐41 Silica Materials as Scaffolds for Silicon‐based Lithium‐ion Battery Anodes ChemElectroChem SiO2 Nanostructures MCM-41 Chemical vapor deposition Anode material |
| title | Porous MCM‐41 Silica Materials as Scaffolds for Silicon‐based Lithium‐ion Battery Anodes |
| title_full | Porous MCM‐41 Silica Materials as Scaffolds for Silicon‐based Lithium‐ion Battery Anodes |
| title_fullStr | Porous MCM‐41 Silica Materials as Scaffolds for Silicon‐based Lithium‐ion Battery Anodes |
| title_full_unstemmed | Porous MCM‐41 Silica Materials as Scaffolds for Silicon‐based Lithium‐ion Battery Anodes |
| title_short | Porous MCM‐41 Silica Materials as Scaffolds for Silicon‐based Lithium‐ion Battery Anodes |
| title_sort | porous mcm 41 silica materials as scaffolds for silicon based lithium ion battery anodes |
| topic | SiO2 Nanostructures MCM-41 Chemical vapor deposition Anode material |
| url | https://doi.org/10.1002/celc.202300707 |
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