Anders Gaarud, Kesavan Thangaian, Pedro Alonso-Sánchez, Maria Valeria Blanco
{"title":"可持续硅藻- sio2制备锂离子电池用纳米多孔SiOx/C阳极的策略:不同碳量的比较研究","authors":"Anders Gaarud, Kesavan Thangaian, Pedro Alonso-Sánchez, Maria Valeria Blanco","doi":"10.1002/adsu.202500117","DOIUrl":null,"url":null,"abstract":"<p>Nanostructured <i>SiO<sub>x</sub></i>/C composites are promising candidates for high energy density anodes with extended lifespan in next-generation Li-ion batteries (LIBs). However, integrating sustainable precursors for the synthesis of high performance <i>SiO<sub>x</sub></i>/C negative electrodesremains a key challenge. In this study, nanoporous <i>SiO</i><sub>2</sub> derived from the shells of industrially cultured diatom microalgae is successfully used as a template for synthesizing <i>SiO<sub>x</sub></i> via the magnesiothermic reduction reaction (MgTR), while the effectiveness of different carbon coating (CC) strategies to produce diatom-<i>SiO<sub>x</sub></i>/C from glucose as carbon precursor is thoroughly analyzed. Notably, the original nanostructure of the diatom-<i>SiO</i><sub>2</sub> frustule is preserved throughout the synthesis process, and it is demonstrated that increasing the heating ramp during MgTR enhances the Si yield, leading to a significant increase in specific capacity of the anodes from 1064 mAh.g<sup>−1</sup> (2 °C/min<sup>−1</sup>) to 1846 mAh.g<sup>−1</sup> (20 °C/min<sup>−1</sup>). A comparative analysis of three synthesis pathways for producing diatom-<i>SiO<sub>x</sub></i>/C composites: 1) MgTR of diatom-<i>SiO</i><sub>2</sub> followed by CC, 2) CC of diatom-<i>SiO</i><sub>2</sub> followed by MgTR, and 3) simultaneous reduction of diatom-<i>SiO</i><sub>2</sub> and glucose precursor, revealed that pathway (1) is most effective for producing highcapacity diatom-<i>SiO<sub>x</sub></i>/C anodes. These findings provide key enablers for developing sustainable <i>SiO<sub>x</sub></i>/C anodes of superior electrochemical performance.</p>","PeriodicalId":7294,"journal":{"name":"Advanced Sustainable Systems","volume":"9 5","pages":""},"PeriodicalIF":6.5000,"publicationDate":"2025-03-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Strategies Toward the Production of Nanoporous SiOx/C Anodes from the Sustainable Diatom-SiO2 for Li-Ion Batteries: A Comparative Study of Different Carbon Amounts\",\"authors\":\"Anders Gaarud, Kesavan Thangaian, Pedro Alonso-Sánchez, Maria Valeria Blanco\",\"doi\":\"10.1002/adsu.202500117\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<p>Nanostructured <i>SiO<sub>x</sub></i>/C composites are promising candidates for high energy density anodes with extended lifespan in next-generation Li-ion batteries (LIBs). However, integrating sustainable precursors for the synthesis of high performance <i>SiO<sub>x</sub></i>/C negative electrodesremains a key challenge. In this study, nanoporous <i>SiO</i><sub>2</sub> derived from the shells of industrially cultured diatom microalgae is successfully used as a template for synthesizing <i>SiO<sub>x</sub></i> via the magnesiothermic reduction reaction (MgTR), while the effectiveness of different carbon coating (CC) strategies to produce diatom-<i>SiO<sub>x</sub></i>/C from glucose as carbon precursor is thoroughly analyzed. Notably, the original nanostructure of the diatom-<i>SiO</i><sub>2</sub> frustule is preserved throughout the synthesis process, and it is demonstrated that increasing the heating ramp during MgTR enhances the Si yield, leading to a significant increase in specific capacity of the anodes from 1064 mAh.g<sup>−1</sup> (2 °C/min<sup>−1</sup>) to 1846 mAh.g<sup>−1</sup> (20 °C/min<sup>−1</sup>). A comparative analysis of three synthesis pathways for producing diatom-<i>SiO<sub>x</sub></i>/C composites: 1) MgTR of diatom-<i>SiO</i><sub>2</sub> followed by CC, 2) CC of diatom-<i>SiO</i><sub>2</sub> followed by MgTR, and 3) simultaneous reduction of diatom-<i>SiO</i><sub>2</sub> and glucose precursor, revealed that pathway (1) is most effective for producing highcapacity diatom-<i>SiO<sub>x</sub></i>/C anodes. These findings provide key enablers for developing sustainable <i>SiO<sub>x</sub></i>/C anodes of superior electrochemical performance.</p>\",\"PeriodicalId\":7294,\"journal\":{\"name\":\"Advanced Sustainable Systems\",\"volume\":\"9 5\",\"pages\":\"\"},\"PeriodicalIF\":6.5000,\"publicationDate\":\"2025-03-30\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Advanced Sustainable Systems\",\"FirstCategoryId\":\"88\",\"ListUrlMain\":\"https://onlinelibrary.wiley.com/doi/10.1002/adsu.202500117\",\"RegionNum\":3,\"RegionCategory\":\"材料科学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q2\",\"JCRName\":\"GREEN & SUSTAINABLE SCIENCE & TECHNOLOGY\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Advanced Sustainable Systems","FirstCategoryId":"88","ListUrlMain":"https://onlinelibrary.wiley.com/doi/10.1002/adsu.202500117","RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"GREEN & SUSTAINABLE SCIENCE & TECHNOLOGY","Score":null,"Total":0}
Strategies Toward the Production of Nanoporous SiOx/C Anodes from the Sustainable Diatom-SiO2 for Li-Ion Batteries: A Comparative Study of Different Carbon Amounts
Nanostructured SiOx/C composites are promising candidates for high energy density anodes with extended lifespan in next-generation Li-ion batteries (LIBs). However, integrating sustainable precursors for the synthesis of high performance SiOx/C negative electrodesremains a key challenge. In this study, nanoporous SiO2 derived from the shells of industrially cultured diatom microalgae is successfully used as a template for synthesizing SiOx via the magnesiothermic reduction reaction (MgTR), while the effectiveness of different carbon coating (CC) strategies to produce diatom-SiOx/C from glucose as carbon precursor is thoroughly analyzed. Notably, the original nanostructure of the diatom-SiO2 frustule is preserved throughout the synthesis process, and it is demonstrated that increasing the heating ramp during MgTR enhances the Si yield, leading to a significant increase in specific capacity of the anodes from 1064 mAh.g−1 (2 °C/min−1) to 1846 mAh.g−1 (20 °C/min−1). A comparative analysis of three synthesis pathways for producing diatom-SiOx/C composites: 1) MgTR of diatom-SiO2 followed by CC, 2) CC of diatom-SiO2 followed by MgTR, and 3) simultaneous reduction of diatom-SiO2 and glucose precursor, revealed that pathway (1) is most effective for producing highcapacity diatom-SiOx/C anodes. These findings provide key enablers for developing sustainable SiOx/C anodes of superior electrochemical performance.
期刊介绍:
Advanced Sustainable Systems, a part of the esteemed Advanced portfolio, serves as an interdisciplinary sustainability science journal. It focuses on impactful research in the advancement of sustainable, efficient, and less wasteful systems and technologies. Aligned with the UN's Sustainable Development Goals, the journal bridges knowledge gaps between fundamental research, implementation, and policy-making. Covering diverse topics such as climate change, food sustainability, environmental science, renewable energy, water, urban development, and socio-economic challenges, it contributes to the understanding and promotion of sustainable systems.