Cycle Performances of Si-flake-powder Anodes in Lithium Salt-tetraglyme Complex Electrolytes

• HARUTA Masakazu

  Depertment of Molecular Chemistry and Biochemistry, Doshisha University

• MASUO Yuta

  Depertment of Molecular Chemistry and Biochemistry, Doshisha University

• MORIYASU Takashi

  Depertment of Molecular Chemistry and Biochemistry, Doshisha University

• TOMITA Akira

  Oike & Co., Ltd.

• SAKAKIBARA Chihiro

  Oike & Co., Ltd.

• KAMEI Akika

  Oike & Co., Ltd.

• HIROTA Masato

  Oike & Co., Ltd.

• TAKENAKA Toshio

  Oike & Co., Ltd.

• DOI Takayuki

  Depertment of Molecular Chemistry and Biochemistry, Doshisha University

• INABA Minoru

  Depertment of Molecular Chemistry and Biochemistry, Doshisha University

Abstract

Charge and discharge properties of amorphous Si nano-flake powder (Si Leaf Powder^®, Si-LP) in lithium bis(trifluoromethanesulfonyl)amide-tetraglyme complex electrolyte, [Li(G4)][TFSA], were investigated for use as an anode in silicon-sulfur battery. Though a high reversible capacity (2,300–2,700 mAh g⁻¹) was obtained initially in [Li(G4)][TFSA], the overpotential gradually increased upon cycling. The increase in overpotential was reduced by dilution with 1,1,2,2-tetrafluoroethyl-2,2,3,3-tetrafluoropropyl ether. The addition of fluoroethylene carbonate (FEC) further reduced the overpotential and improved cycleability. Electrochemical impedance spectroscopy analysis revealed that the observed improvements in charge and discharge characteristics are due to the formation of solid electrolyte interface layer with a high ionic-conductivity in the presence of FEC.

Journal

• Electrochemistry

  Electrochemistry 83 (10), 837-839, 2015

  The Electrochemical Society of Japan

Keywords

• Silicon Anode
• Flake Powder
• Tetraglyme
• Silicon-sulfur Battery

Details

• CRID: 1390282681474816384
• NII Article ID: 130005100766
• NII Book ID: AN00151637
• DOI: 10.5796/electrochemistry.83.837
• ISSN: 21862451
• ISSN: 13443542
• NDL BIB ID: 026770113
• Web Site: http://id.ndl.go.jp/bib/026770113
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I026770113
• Web Site: https://www.jstage.jst.go.jp/article/electrochemistry/83/10/83_15-E00065/_pdf
• Text Lang: en
• Data Source:
  • JaLC
  • NDL
  • Crossref
  • CiNii Articles
  • KAKEN
• Abstract License Flag: Allowed