A magnesiothermic route to multicomponent nanocomposites of FeSi 2@Si@graphene and FeSi2@Si with promising anode performance

Kanyaporn Adpakpang; Ji Eun Park; Seung Mi Oh; Sung Jin Kim; Seong Ju Hwang

doi:10.1016/j.electacta.2014.05.121

A magnesiothermic route to multicomponent nanocomposites of FeSi ₂@Si@graphene and FeSi₂@Si with promising anode performance

Kanyaporn Adpakpang, Ji Eun Park, Seung Mi Oh, Sung Jin Kim, Seong Ju Hwang

Department of Chemistry & Nanoscience

Research output: Contribution to journal › Article › peer-review

29 Scopus citations

Abstract

The multicomponent nanocomposites of FeSi₂@Si@graphene and FeSi₂@Si are synthesized via the magnesiothermic reduction of core-shell Fe₃O₄@SiO₂ nanoparticles with/without graphene oxide shell. In the course of the magnesiothermic reaction, the SiO₂ and Fe₃O₄ components in the Fe₃O₄@SiO₂ core-shell particles are transformed into elemental Si and FeSi₂, respectively. The formation of intimately-coupled composite structure consisting of Si and FeSi₂ domains as well as the coating of graphene layer is verified by high resolution-transmission electron microscopy. Both the nanocomposites of FeSi₂@Si@graphene and FeSi₂@Si show promising anode performance for lithium ion batteries, indicating a beneficial role of the electrochemically inactive FeSi₂ domains in alleviating the drastic expansion/contraction of elemental Si during the electrochemical cycling. The better cyclability and rate characteristic are obtained for the FeSi ₂@Si@graphene nanocomposite than for the graphene-free FeSi ₂@Si one, which is attributable to the depression of pulverization and the enhancement of electrical conductivity upon the coating of graphene layer. The present work highlights that the magnesiothermic reaction provides a powerful synthetic route to multicomponent Si-based nanocomposites with tailored composition and complex geometry.

Original language	English
Pages (from-to)	483-492
Number of pages	10
Journal	Electrochimica Acta
Volume	136
DOIs	https://doi.org/10.1016/j.electacta.2014.05.121
State	Published - 1 Aug 2014

Bibliographical note

Funding Information:
This work was supported by the National Research Foundation of Korea (NRF) Grant funded by the Korean Government (MEST)" (NRF-2010-C1AAA001-2010-0029065), by the Core Technology of Materials Research and Development Program of the Korea Ministry of Intelligence and Economy (grant No. 10041232), by the National Research Foundation of Korea(NRF) grant funded by the Korea government (MEST) (NRF-20011-001419), and by the National Research Foundation of Korea (NRF) Grant funded by the Korean Government (MEST)" (NRF-2011-0014219).

Keywords

Anode materials
Graphene
Lithium secondary batteries
Magnesiothermic reaction
Nanocomposites
Nanoparticles

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

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10.1016/j.electacta.2014.05.121

Cite this

@article{9ef458dcba4d486e98adfe0ffbc759c2,

title = "A magnesiothermic route to multicomponent nanocomposites of FeSi 2@Si@graphene and FeSi2@Si with promising anode performance",

abstract = "The multicomponent nanocomposites of FeSi2@Si@graphene and FeSi2@Si are synthesized via the magnesiothermic reduction of core-shell Fe3O4@SiO2 nanoparticles with/without graphene oxide shell. In the course of the magnesiothermic reaction, the SiO2 and Fe3O4 components in the Fe3O4@SiO2 core-shell particles are transformed into elemental Si and FeSi2, respectively. The formation of intimately-coupled composite structure consisting of Si and FeSi2 domains as well as the coating of graphene layer is verified by high resolution-transmission electron microscopy. Both the nanocomposites of FeSi2@Si@graphene and FeSi2@Si show promising anode performance for lithium ion batteries, indicating a beneficial role of the electrochemically inactive FeSi2 domains in alleviating the drastic expansion/contraction of elemental Si during the electrochemical cycling. The better cyclability and rate characteristic are obtained for the FeSi 2@Si@graphene nanocomposite than for the graphene-free FeSi 2@Si one, which is attributable to the depression of pulverization and the enhancement of electrical conductivity upon the coating of graphene layer. The present work highlights that the magnesiothermic reaction provides a powerful synthetic route to multicomponent Si-based nanocomposites with tailored composition and complex geometry.",

keywords = "Anode materials, Graphene, Lithium secondary batteries, Magnesiothermic reaction, Nanocomposites, Nanoparticles",

author = "Kanyaporn Adpakpang and Park, {Ji Eun} and Oh, {Seung Mi} and Kim, {Sung Jin} and Hwang, {Seong Ju}",

note = "Funding Information: This work was supported by the National Research Foundation of Korea (NRF) Grant funded by the Korean Government (MEST){"} (NRF-2010-C1AAA001-2010-0029065), by the Core Technology of Materials Research and Development Program of the Korea Ministry of Intelligence and Economy (grant No. 10041232), by the National Research Foundation of Korea(NRF) grant funded by the Korea government (MEST) (NRF-20011-001419), and by the National Research Foundation of Korea (NRF) Grant funded by the Korean Government (MEST){"} (NRF-2011-0014219). ",

year = "2014",

month = aug,

day = "1",

doi = "10.1016/j.electacta.2014.05.121",

language = "English",

volume = "136",

pages = "483--492",

journal = "Electrochimica Acta",

issn = "0013-4686",

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TY - JOUR

T1 - A magnesiothermic route to multicomponent nanocomposites of FeSi 2@Si@graphene and FeSi2@Si with promising anode performance

AU - Adpakpang, Kanyaporn

AU - Park, Ji Eun

AU - Oh, Seung Mi

AU - Kim, Sung Jin

AU - Hwang, Seong Ju

N1 - Funding Information: This work was supported by the National Research Foundation of Korea (NRF) Grant funded by the Korean Government (MEST)" (NRF-2010-C1AAA001-2010-0029065), by the Core Technology of Materials Research and Development Program of the Korea Ministry of Intelligence and Economy (grant No. 10041232), by the National Research Foundation of Korea(NRF) grant funded by the Korea government (MEST) (NRF-20011-001419), and by the National Research Foundation of Korea (NRF) Grant funded by the Korean Government (MEST)" (NRF-2011-0014219).

PY - 2014/8/1

Y1 - 2014/8/1

N2 - The multicomponent nanocomposites of FeSi2@Si@graphene and FeSi2@Si are synthesized via the magnesiothermic reduction of core-shell Fe3O4@SiO2 nanoparticles with/without graphene oxide shell. In the course of the magnesiothermic reaction, the SiO2 and Fe3O4 components in the Fe3O4@SiO2 core-shell particles are transformed into elemental Si and FeSi2, respectively. The formation of intimately-coupled composite structure consisting of Si and FeSi2 domains as well as the coating of graphene layer is verified by high resolution-transmission electron microscopy. Both the nanocomposites of FeSi2@Si@graphene and FeSi2@Si show promising anode performance for lithium ion batteries, indicating a beneficial role of the electrochemically inactive FeSi2 domains in alleviating the drastic expansion/contraction of elemental Si during the electrochemical cycling. The better cyclability and rate characteristic are obtained for the FeSi 2@Si@graphene nanocomposite than for the graphene-free FeSi 2@Si one, which is attributable to the depression of pulverization and the enhancement of electrical conductivity upon the coating of graphene layer. The present work highlights that the magnesiothermic reaction provides a powerful synthetic route to multicomponent Si-based nanocomposites with tailored composition and complex geometry.

AB - The multicomponent nanocomposites of FeSi2@Si@graphene and FeSi2@Si are synthesized via the magnesiothermic reduction of core-shell Fe3O4@SiO2 nanoparticles with/without graphene oxide shell. In the course of the magnesiothermic reaction, the SiO2 and Fe3O4 components in the Fe3O4@SiO2 core-shell particles are transformed into elemental Si and FeSi2, respectively. The formation of intimately-coupled composite structure consisting of Si and FeSi2 domains as well as the coating of graphene layer is verified by high resolution-transmission electron microscopy. Both the nanocomposites of FeSi2@Si@graphene and FeSi2@Si show promising anode performance for lithium ion batteries, indicating a beneficial role of the electrochemically inactive FeSi2 domains in alleviating the drastic expansion/contraction of elemental Si during the electrochemical cycling. The better cyclability and rate characteristic are obtained for the FeSi 2@Si@graphene nanocomposite than for the graphene-free FeSi 2@Si one, which is attributable to the depression of pulverization and the enhancement of electrical conductivity upon the coating of graphene layer. The present work highlights that the magnesiothermic reaction provides a powerful synthetic route to multicomponent Si-based nanocomposites with tailored composition and complex geometry.

KW - Anode materials

KW - Graphene

KW - Lithium secondary batteries

KW - Magnesiothermic reaction

KW - Nanocomposites

KW - Nanoparticles

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U2 - 10.1016/j.electacta.2014.05.121

DO - 10.1016/j.electacta.2014.05.121

M3 - Article

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VL - 136

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EP - 492

JO - Electrochimica Acta

JF - Electrochimica Acta

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