000161683 001__ 161683 000161683 005__ 20251017144553.0 000161683 0247_ $$2doi$$a10.1002/adsu.202500117 000161683 0248_ $$2sideral$$a144356 000161683 037__ $$aART-2025-144356 000161683 041__ $$aeng 000161683 100__ $$aGaarud, Anders 000161683 245__ $$aStrategies Toward the Production of Nanoporous <i>SiO<sub>x</sub></i>/C Anodes from the Sustainable Diatom‐<i>SiO</i><sub>2</sub> for Li‐Ion Batteries: A Comparative Study of Different Carbon Amounts 000161683 260__ $$c2025 000161683 5203_ $$aNanostructured 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. 000161683 540__ $$9info:eu-repo/semantics/closedAccess$$aAll rights reserved$$uhttp://www.europeana.eu/rights/rr-f/ 000161683 655_4 $$ainfo:eu-repo/semantics/article$$vinfo:eu-repo/semantics/publishedVersion 000161683 700__ $$aThangaian, Kesavan 000161683 700__ $$aAlonso-Sánchez, Pedro 000161683 700__ $$aBlanco, Maria Valeria 000161683 773__ $$g9, 5 (2025), 2500117 [9 pp.]$$tAdvanced Sustainable Systems$$x2366-7486 000161683 8564_ $$s3364696$$uhttps://zaguan.unizar.es/record/161683/files/texto_completo.pdf$$yVersión publicada 000161683 8564_ $$s2824396$$uhttps://zaguan.unizar.es/record/161683/files/texto_completo.jpg?subformat=icon$$xicon$$yVersión publicada 000161683 909CO $$ooai:zaguan.unizar.es:161683$$particulos$$pdriver 000161683 951__ $$a2025-10-17-14:12:21 000161683 980__ $$aARTICLE