Facile synthesis of SiOx/C as high-performance anodes for lithium-ion batteries
Hui, Xuewen; Lin, Yan; Mo, Hesu; Zha, Zhenlong; Ma, Zequn; Chen, Zhigang; Wu, Zhengying (2024-06-03)
Avaa tiedosto
Sisältö avataan julkiseksi: 03.06.2026
Elsevier
03.06.2024
Hui, X., Lin, Y., Mo, H., Zha, Z., Ma, Z., Chen, Z., & Wu, Z. (2024). Facile synthesis of SiO /C as high-performance anodes for lithium-ion batteries. Chemical Physics Letters, 848, 141388. https://doi.org/10.1016/j.cplett.2024.141388
https://creativecommons.org/licenses/by-nc-nd/4.0/
© 2024. This manuscript version is made available under the CC-BY-NC-ND 4.0 license https://creativecommons.org/licenses/by-nc-nd/4.0/
https://creativecommons.org/licenses/by-nc-nd/4.0/
© 2024. This manuscript version is made available under the CC-BY-NC-ND 4.0 license https://creativecommons.org/licenses/by-nc-nd/4.0/
https://creativecommons.org/licenses/by-nc-nd/4.0/
Julkaisun pysyvä osoite on
https://urn.fi/URN:NBN:fi:oulu-202409135834
https://urn.fi/URN:NBN:fi:oulu-202409135834
Tiivistelmä
Abstract
Despite its high capacity (∼2615 mAh·g−1), silicon oxide (SiOx) suffers from low electrical conductivity and volume expansion during cycling, leading to capacity fading. In this work, a SiOx/C composite was synthesized by magnesium thermal reduction using co-assembled mesoporous SiO2 and graphitic carbon nitride (g-C3N4) as precursors. The SiOx/C composite displays a sheet-like nanostructure with highly dispersed SiOx. The presence of carbon enhances the conductivity and structural stability of the composite, leading to a low charge resistance (94.0 Ω), fast lithium diffusion (DLi+ = 5.15 × 10−14 cm2·s−1), and excellent cycling capability (863 mAh·g−1 after 160 cycles).
Despite its high capacity (∼2615 mAh·g−1), silicon oxide (SiOx) suffers from low electrical conductivity and volume expansion during cycling, leading to capacity fading. In this work, a SiOx/C composite was synthesized by magnesium thermal reduction using co-assembled mesoporous SiO2 and graphitic carbon nitride (g-C3N4) as precursors. The SiOx/C composite displays a sheet-like nanostructure with highly dispersed SiOx. The presence of carbon enhances the conductivity and structural stability of the composite, leading to a low charge resistance (94.0 Ω), fast lithium diffusion (DLi+ = 5.15 × 10−14 cm2·s−1), and excellent cycling capability (863 mAh·g−1 after 160 cycles).
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