Tin addition for mechanical and electronic improvement of electrodeposited Si–O–C composite anode for lithium-ion battery

Research output: Contribution to journalArticle

Abstract

The silicon-based composite prepared by electrodeposition exhibits outstanding electrochemical performances for several thousand cycles because the co-deposited oxygen and carbon could act as buffer materials to reduce internal stress during charge-discharge cycling. However, it is not easy to increase the loading amount of active materials due to low structural stability at a high passing charge over 15 C cm−2 for electrodeposition, leading the low areal capacity of Si–O–C composite as an anode. In this study, we propose a new way to enhance the structural stability of silicon-based anode by an electrochemical co-deposition technique using tin as supporting material, namely Sn–Si–O–C composite. The co-deposited tin has a whisker-shaped structure, and it prevents the exfoliation of activated material during electrodeposition. Besides, tin whisker can act as an electron pathway, resulting in improved electrochemical performance including high rate performance. The enhanced electrical conductivity is investigated by electrochemical impedance analysis. The improved electrochemical performance of Sn–Si–O–C composite indicates the high potential as an electrode material for high-performance lithium-ion batteries.

Original languageEnglish
Article number226858
JournalJournal of Power Sources
Volume437
DOIs
Publication statusPublished - 2019 Oct 15

Fingerprint

Tin
electric batteries
tin
Anodes
anodes
lithium
Electrodeposition
composite materials
electrodeposition
Composite materials
Silicon
electronics
structural stability
ions
cycles
silicon
Residual stresses
electrode materials
Buffers
Carbon

Keywords

  • Anode material
  • Electrochemical co-deposition
  • Lithium-ion batteries
  • Sn-Si-O-C composite
  • Tin whisker

ASJC Scopus subject areas

  • Renewable Energy, Sustainability and the Environment
  • Energy Engineering and Power Technology
  • Physical and Theoretical Chemistry
  • Electrical and Electronic Engineering

Cite this

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title = "Tin addition for mechanical and electronic improvement of electrodeposited Si–O–C composite anode for lithium-ion battery",
abstract = "The silicon-based composite prepared by electrodeposition exhibits outstanding electrochemical performances for several thousand cycles because the co-deposited oxygen and carbon could act as buffer materials to reduce internal stress during charge-discharge cycling. However, it is not easy to increase the loading amount of active materials due to low structural stability at a high passing charge over 15 C cm−2 for electrodeposition, leading the low areal capacity of Si–O–C composite as an anode. In this study, we propose a new way to enhance the structural stability of silicon-based anode by an electrochemical co-deposition technique using tin as supporting material, namely Sn–Si–O–C composite. The co-deposited tin has a whisker-shaped structure, and it prevents the exfoliation of activated material during electrodeposition. Besides, tin whisker can act as an electron pathway, resulting in improved electrochemical performance including high rate performance. The enhanced electrical conductivity is investigated by electrochemical impedance analysis. The improved electrochemical performance of Sn–Si–O–C composite indicates the high potential as an electrode material for high-performance lithium-ion batteries.",
keywords = "Anode material, Electrochemical co-deposition, Lithium-ion batteries, Sn-Si-O-C composite, Tin whisker",
author = "Seongki Ahn and Takahiro Kadoya and Hiroki Nara and Tokihiko Yokoshima and Toshiyuki Momma and Tetsuya Osaka",
year = "2019",
month = "10",
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doi = "10.1016/j.jpowsour.2019.226858",
language = "English",
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journal = "Journal of Power Sources",
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T1 - Tin addition for mechanical and electronic improvement of electrodeposited Si–O–C composite anode for lithium-ion battery

AU - Ahn, Seongki

AU - Kadoya, Takahiro

AU - Nara, Hiroki

AU - Yokoshima, Tokihiko

AU - Momma, Toshiyuki

AU - Osaka, Tetsuya

PY - 2019/10/15

Y1 - 2019/10/15

N2 - The silicon-based composite prepared by electrodeposition exhibits outstanding electrochemical performances for several thousand cycles because the co-deposited oxygen and carbon could act as buffer materials to reduce internal stress during charge-discharge cycling. However, it is not easy to increase the loading amount of active materials due to low structural stability at a high passing charge over 15 C cm−2 for electrodeposition, leading the low areal capacity of Si–O–C composite as an anode. In this study, we propose a new way to enhance the structural stability of silicon-based anode by an electrochemical co-deposition technique using tin as supporting material, namely Sn–Si–O–C composite. The co-deposited tin has a whisker-shaped structure, and it prevents the exfoliation of activated material during electrodeposition. Besides, tin whisker can act as an electron pathway, resulting in improved electrochemical performance including high rate performance. The enhanced electrical conductivity is investigated by electrochemical impedance analysis. The improved electrochemical performance of Sn–Si–O–C composite indicates the high potential as an electrode material for high-performance lithium-ion batteries.

AB - The silicon-based composite prepared by electrodeposition exhibits outstanding electrochemical performances for several thousand cycles because the co-deposited oxygen and carbon could act as buffer materials to reduce internal stress during charge-discharge cycling. However, it is not easy to increase the loading amount of active materials due to low structural stability at a high passing charge over 15 C cm−2 for electrodeposition, leading the low areal capacity of Si–O–C composite as an anode. In this study, we propose a new way to enhance the structural stability of silicon-based anode by an electrochemical co-deposition technique using tin as supporting material, namely Sn–Si–O–C composite. The co-deposited tin has a whisker-shaped structure, and it prevents the exfoliation of activated material during electrodeposition. Besides, tin whisker can act as an electron pathway, resulting in improved electrochemical performance including high rate performance. The enhanced electrical conductivity is investigated by electrochemical impedance analysis. The improved electrochemical performance of Sn–Si–O–C composite indicates the high potential as an electrode material for high-performance lithium-ion batteries.

KW - Anode material

KW - Electrochemical co-deposition

KW - Lithium-ion batteries

KW - Sn-Si-O-C composite

KW - Tin whisker

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