Toward the Controlled Synthesis of Nanostructured Si and SiOx Anodes for Li-Ion Batteries via SiO2 Magnesiothermic Reduction Reaction

Nanostructured SiOx (0 ≤ x ≤ 2) materials are key for boosting energy density in next-generation Li-ion battery anodes, with the magnesiothermic reduction reaction (MgTR) emerging as a scalable pathway for their production from nanoporous SiO2. In MgTR, SiO2 reacts with Mg at moderate temperatures t...

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Autores: Alonso Sánchez, Pedro, Thangaian, Kesavan, Øie, Ole Andreas, Gaarud, Anders, Rodríguez Gómez, Miguel, Diadkin, Vadim, Campo, Javier, Cova, Federico Héctor, Blanco, María Valeria
Tipo de recurso: artículo
Estado:Versión publicada
Fecha de publicación:2025
País:España
Institución:Universidad de Zaragoza
Repositorio:Zaguán. Repositorio Digital de la Universidad de Zaragoza
OAI Identifier:oai:zaguan.unizar.es:151609
Acceso en línea:http://zaguan.unizar.es/record/151609
Access Level:acceso abierto
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spelling Toward the Controlled Synthesis of Nanostructured Si and SiOx Anodes for Li-Ion Batteries via SiO2 Magnesiothermic Reduction ReactionAlonso Sánchez, PedroThangaian, KesavanØie, Ole AndreasGaarud, AndersRodríguez Gómez, MiguelDiadkin, VadimCampo, JavierCova, Federico HéctorBlanco, María ValeriaNanostructured SiOx (0 ≤ x ≤ 2) materials are key for boosting energy density in next-generation Li-ion battery anodes, with the magnesiothermic reduction reaction (MgTR) emerging as a scalable pathway for their production from nanoporous SiO2. In MgTR, SiO2 reacts with Mg at moderate temperatures to form Si and MgO, enabling the preservation of nanostructured features. However, the widespread application of MgTR is hindered by the strong influence of reaction parameters on process dynamics, which leads to the uncontrolled formation of multiple byproducts that not only reduce the Si yield but also require the use of hazardous hydrofluoric acid (HF) for their removal, hampering the synthesis of SiOx due to HF’s reactivity with SiO2. Hence, a comprehensive understanding of MgTR dynamics and its interplay with reaction parameters constitutes an essential prerequisite toward the effective synthesis of advanced Si and SiOx nanostructures. In this work, a systematic approach combining a set of independent time-resolved in situ synchrotron X-ray diffraction studies was employed to provide for the first time a comprehensive understanding of MgTR dynamics under varied reaction conditions, including varied SiO2 source (amorphous vs crystalline), different SiO2-to-Mg ratios, and different heating ramps. This approach allowed to unveil a complete picture of MgTR and to identify key conditions to prevent byproduct formation. This advancement marks a critical step toward the large-scale zero-carbon footprint synthesis of Si-based anodes for Li-ion batteries, serving as general guidelines for the controlled synthesis of high-purity Si and SiOx advanced materials.2025info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionapplication/pdfhttp://zaguan.unizar.es/record/151609reponame:Zaguán. Repositorio Digital de la Universidad de Zaragozainstname:Universidad de ZaragozaInglésinfo:eu-repo/grantAgreement/ES/MICINN/PCI2022-132993info:eu-repo/semantics/openAccessoai:zaguan.unizar.es:1516092026-05-29T13:59:51Z
dc.title.none.fl_str_mv Toward the Controlled Synthesis of Nanostructured Si and SiOx Anodes for Li-Ion Batteries via SiO2 Magnesiothermic Reduction Reaction
title Toward the Controlled Synthesis of Nanostructured Si and SiOx Anodes for Li-Ion Batteries via SiO2 Magnesiothermic Reduction Reaction
spellingShingle Toward the Controlled Synthesis of Nanostructured Si and SiOx Anodes for Li-Ion Batteries via SiO2 Magnesiothermic Reduction Reaction
Alonso Sánchez, Pedro
title_short Toward the Controlled Synthesis of Nanostructured Si and SiOx Anodes for Li-Ion Batteries via SiO2 Magnesiothermic Reduction Reaction
title_full Toward the Controlled Synthesis of Nanostructured Si and SiOx Anodes for Li-Ion Batteries via SiO2 Magnesiothermic Reduction Reaction
title_fullStr Toward the Controlled Synthesis of Nanostructured Si and SiOx Anodes for Li-Ion Batteries via SiO2 Magnesiothermic Reduction Reaction
title_full_unstemmed Toward the Controlled Synthesis of Nanostructured Si and SiOx Anodes for Li-Ion Batteries via SiO2 Magnesiothermic Reduction Reaction
title_sort Toward the Controlled Synthesis of Nanostructured Si and SiOx Anodes for Li-Ion Batteries via SiO2 Magnesiothermic Reduction Reaction
dc.creator.none.fl_str_mv Alonso Sánchez, Pedro
Thangaian, Kesavan
Øie, Ole Andreas
Gaarud, Anders
Rodríguez Gómez, Miguel
Diadkin, Vadim
Campo, Javier
Cova, Federico Héctor
Blanco, María Valeria
author Alonso Sánchez, Pedro
author_facet Alonso Sánchez, Pedro
Thangaian, Kesavan
Øie, Ole Andreas
Gaarud, Anders
Rodríguez Gómez, Miguel
Diadkin, Vadim
Campo, Javier
Cova, Federico Héctor
Blanco, María Valeria
author_role author
author2 Thangaian, Kesavan
Øie, Ole Andreas
Gaarud, Anders
Rodríguez Gómez, Miguel
Diadkin, Vadim
Campo, Javier
Cova, Federico Héctor
Blanco, María Valeria
author2_role author
author
author
author
author
author
author
author
description Nanostructured SiOx (0 ≤ x ≤ 2) materials are key for boosting energy density in next-generation Li-ion battery anodes, with the magnesiothermic reduction reaction (MgTR) emerging as a scalable pathway for their production from nanoporous SiO2. In MgTR, SiO2 reacts with Mg at moderate temperatures to form Si and MgO, enabling the preservation of nanostructured features. However, the widespread application of MgTR is hindered by the strong influence of reaction parameters on process dynamics, which leads to the uncontrolled formation of multiple byproducts that not only reduce the Si yield but also require the use of hazardous hydrofluoric acid (HF) for their removal, hampering the synthesis of SiOx due to HF’s reactivity with SiO2. Hence, a comprehensive understanding of MgTR dynamics and its interplay with reaction parameters constitutes an essential prerequisite toward the effective synthesis of advanced Si and SiOx nanostructures. In this work, a systematic approach combining a set of independent time-resolved in situ synchrotron X-ray diffraction studies was employed to provide for the first time a comprehensive understanding of MgTR dynamics under varied reaction conditions, including varied SiO2 source (amorphous vs crystalline), different SiO2-to-Mg ratios, and different heating ramps. This approach allowed to unveil a complete picture of MgTR and to identify key conditions to prevent byproduct formation. This advancement marks a critical step toward the large-scale zero-carbon footprint synthesis of Si-based anodes for Li-ion batteries, serving as general guidelines for the controlled synthesis of high-purity Si and SiOx advanced materials.
publishDate 2025
dc.date.none.fl_str_mv 2025
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
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status_str publishedVersion
dc.identifier.none.fl_str_mv http://zaguan.unizar.es/record/151609
url http://zaguan.unizar.es/record/151609
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv info:eu-repo/grantAgreement/ES/MICINN/PCI2022-132993
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv
publisher.none.fl_str_mv
dc.source.none.fl_str_mv reponame:Zaguán. Repositorio Digital de la Universidad de Zaragoza
instname:Universidad de Zaragoza
instname_str Universidad de Zaragoza
reponame_str Zaguán. Repositorio Digital de la Universidad de Zaragoza
collection Zaguán. Repositorio Digital de la Universidad de Zaragoza
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