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Facile high-voltage sputtering synthesis of three-dimensional hierarchical porous nitrogen-doped carbon coated Si composite for high performance lithium-ion batteries
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2018 (English)In: Chemical Engineering Journal, ISSN 1385-8947, E-ISSN 1873-3212, Vol. 343, p. 78-85Article in journal (Refereed) Published
Abstract [en]

Various kinds of efforts have been devoted to ameliorate the serious volume-expansion effect and low electron conductivity of silicon-based materials in lithium ion batteries. Here, we report a facile high voltage sputtering process to prepare three-dimensional hierarchical porous nitrogen-doped carbon coated Si microsphere to significantly improve the lithium storage performance. The structure and morphology of the as-obtained samples are characterized by X-ray diffraction, transmission electron microscope and scanning electron microscope. The results indicate that the as-prepared composite is composed of silicon nanoparticles (similar to 100 nm) coated with conductive thin carbon layer (similar to 8.5 nm). The composite shows excellent lithium storage performance with a reversible capacity of 1565 mAh g(-1) after 100 cycles at a current density of 0.5 A g(-1), as well as a long cycling performance at the high current density of 2 A g(-1). The facile preparation process and highly silicon-loading (similar to 78%) makes the prepared material be a great potential application in lithium-ion batteries.

Place, publisher, year, edition, pages
2018. Vol. 343, p. 78-85
Keywords [en]
Three-dimensional hierarchical porous nitrogen-doped carbon, Silicon nanoparticles, High voltage uttering, Void space, Lithium-ion batteries
National Category
Materials Chemistry
Identifiers
URN: urn:nbn:se:umu:diva-147423DOI: 10.1016/j.cej.2018.02.111ISI: 000430269200010OAI: oai:DiVA.org:umu-147423DiVA, id: diva2:1233952
Available from: 2018-07-20 Created: 2018-07-20 Last updated: 2018-07-20Bibliographically approved

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Wågberg, ThomasHu, Guangzhi

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