Structural analysis of highly-durable SiOC composite anode prepared by electrodeposition for lithium secondary batteries

研究成果: Article

24 引用 (Scopus)

抄録

The structure of the highly durable silicon-based anode prepared by electrodeposition was investigated for volume change and chemical structure. With repeated charge-discharge cycles, the volume change resulting from the anode film thickness decreased, and, after 100 cycles, essentially no difference was observed between the charged and discharged states. The buffering effect of the volume change was considered to be achieved by the formation of Li 2O, Li2CO3, and lithium silicates such as Li4SiO4, whose existence were supported by STEM, EELS, and XPS analyses. From the structural analyses, the main reactions related to the capacity of the silicon-based anode were considered to be the formation of LixSi and Li2Si2O5. LixSi and Li2Si2O5 can be delithiated into Si and SiO2, respectively.

元の言語English
ページ(範囲)403-410
ページ数8
ジャーナルElectrochimica Acta
110
DOI
出版物ステータスPublished - 2013

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Secondary batteries
Lithium
Electrodeposition
Structural analysis
Anodes
Silicon
Composite materials
Silicates
Electron energy loss spectroscopy
Film thickness
X ray photoelectron spectroscopy

ASJC Scopus subject areas

  • Chemical Engineering(all)
  • Electrochemistry

これを引用

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title = "Structural analysis of highly-durable SiOC composite anode prepared by electrodeposition for lithium secondary batteries",
abstract = "The structure of the highly durable silicon-based anode prepared by electrodeposition was investigated for volume change and chemical structure. With repeated charge-discharge cycles, the volume change resulting from the anode film thickness decreased, and, after 100 cycles, essentially no difference was observed between the charged and discharged states. The buffering effect of the volume change was considered to be achieved by the formation of Li 2O, Li2CO3, and lithium silicates such as Li4SiO4, whose existence were supported by STEM, EELS, and XPS analyses. From the structural analyses, the main reactions related to the capacity of the silicon-based anode were considered to be the formation of LixSi and Li2Si2O5. LixSi and Li2Si2O5 can be delithiated into Si and SiO2, respectively.",
keywords = "Durability, Electrodeposition, Lithium battery, Organic/inorganic composite, Silicon anode",
author = "Hiroki Nara and Tokihiko Yokoshima and Mitsutoshi Otaki and Toshiyuki Momma and Tetsuya Osaka",
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T1 - Structural analysis of highly-durable SiOC composite anode prepared by electrodeposition for lithium secondary batteries

AU - Nara, Hiroki

AU - Yokoshima, Tokihiko

AU - Otaki, Mitsutoshi

AU - Momma, Toshiyuki

AU - Osaka, Tetsuya

PY - 2013

Y1 - 2013

N2 - The structure of the highly durable silicon-based anode prepared by electrodeposition was investigated for volume change and chemical structure. With repeated charge-discharge cycles, the volume change resulting from the anode film thickness decreased, and, after 100 cycles, essentially no difference was observed between the charged and discharged states. The buffering effect of the volume change was considered to be achieved by the formation of Li 2O, Li2CO3, and lithium silicates such as Li4SiO4, whose existence were supported by STEM, EELS, and XPS analyses. From the structural analyses, the main reactions related to the capacity of the silicon-based anode were considered to be the formation of LixSi and Li2Si2O5. LixSi and Li2Si2O5 can be delithiated into Si and SiO2, respectively.

AB - The structure of the highly durable silicon-based anode prepared by electrodeposition was investigated for volume change and chemical structure. With repeated charge-discharge cycles, the volume change resulting from the anode film thickness decreased, and, after 100 cycles, essentially no difference was observed between the charged and discharged states. The buffering effect of the volume change was considered to be achieved by the formation of Li 2O, Li2CO3, and lithium silicates such as Li4SiO4, whose existence were supported by STEM, EELS, and XPS analyses. From the structural analyses, the main reactions related to the capacity of the silicon-based anode were considered to be the formation of LixSi and Li2Si2O5. LixSi and Li2Si2O5 can be delithiated into Si and SiO2, respectively.

KW - Durability

KW - Electrodeposition

KW - Lithium battery

KW - Organic/inorganic composite

KW - Silicon anode

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