Monodisperse and homogeneous SiOx/C microspheres: A promising high-capacity and durable anode material for lithium-ion batteries
Author(s)
Liu, Z
Guan, D
Yu, Q
Xu, L
Zhuang, Z
Zhu, T
Zhao, D
Zhou, L
Mai, L
Griffith University Author(s)
Year published
2018
Metadata
Show full item recordAbstract
Monodisperse SiOx/C microspheres with tunable size (300–1000 nm) and well-controlled carbon content (~ 20–60 wt%) have been fabricated through a facile sol-gel method. The judicious selection of silicon and carbon precursors (vinyltriethoxysilane and resorcinol/formaldehyde) enables the formation of an homogeneous SiOx/C (x = 1.63) composite, in which the SiOx mainly exists as ultrafine nano-domains (<2 nm). Benefiting from the unique structural features, the resultant SiOx/C microspheres demonstrate high capacity and outstanding cyclability. Specifically, a reversible capacity of 999 mA h g−1 can be achieved at 100 mA g−1, ...
View more >Monodisperse SiOx/C microspheres with tunable size (300–1000 nm) and well-controlled carbon content (~ 20–60 wt%) have been fabricated through a facile sol-gel method. The judicious selection of silicon and carbon precursors (vinyltriethoxysilane and resorcinol/formaldehyde) enables the formation of an homogeneous SiOx/C (x = 1.63) composite, in which the SiOx mainly exists as ultrafine nano-domains (<2 nm). Benefiting from the unique structural features, the resultant SiOx/C microspheres demonstrate high capacity and outstanding cyclability. Specifically, a reversible capacity of 999 mA h g−1 can be achieved at 100 mA g−1, retaining 853 mA h g−1 after 150 cycles. At 500 mA g−1, the SiOx/C delivers a specific capacity of 689 mA h g−1 and maintains 91.0% of the capacity after 400 cycles. SiOx/C//LiFePO4 full cells are also assembled, leading to an energy density of ~ 372 W h kg−1 based on the total mass of active materials. This work sheds light on the rational design of high-performance SiOx based anode materials for lithium-ion batteries.
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View more >Monodisperse SiOx/C microspheres with tunable size (300–1000 nm) and well-controlled carbon content (~ 20–60 wt%) have been fabricated through a facile sol-gel method. The judicious selection of silicon and carbon precursors (vinyltriethoxysilane and resorcinol/formaldehyde) enables the formation of an homogeneous SiOx/C (x = 1.63) composite, in which the SiOx mainly exists as ultrafine nano-domains (<2 nm). Benefiting from the unique structural features, the resultant SiOx/C microspheres demonstrate high capacity and outstanding cyclability. Specifically, a reversible capacity of 999 mA h g−1 can be achieved at 100 mA g−1, retaining 853 mA h g−1 after 150 cycles. At 500 mA g−1, the SiOx/C delivers a specific capacity of 689 mA h g−1 and maintains 91.0% of the capacity after 400 cycles. SiOx/C//LiFePO4 full cells are also assembled, leading to an energy density of ~ 372 W h kg−1 based on the total mass of active materials. This work sheds light on the rational design of high-performance SiOx based anode materials for lithium-ion batteries.
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Journal Title
Energy Storage Materials
Volume
13
Subject
Chemical engineering
Electrical engineering