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2000 Fiscal Year Final Research Report Summary

Electrolytic Properties and Application to Lithium Battery of Solutions with Sydnone Compounds

Research Project

Project/Area Number 10650818
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeSingle-year Grants
Section一般
Research Field 工業物理化学
Research InstitutionTOKYO INSTITUTE OF POLYTECHNICS

Principal Investigator

SASAKI Yukio  Professor, Tokyo Institute of Polytechnics, 工学部, 教授 (20064280)

Co-Investigator(Kenkyū-buntansha) NANBU Noritoshi  Assistant, Tokyo Institute of Polytechnics, 工学部, 助手 (40329214)
HANDA Minoru  Lecturer, Tokyo Institute of Polytechnics, 工学部, 講師 (70247328)
Project Period (FY) 1998 – 2000
KeywordsLithium Batteries / Organic Electrolyte / Scanning Electron Microscope / Sydnone Compounds / Conductivity / X-ray Photoelectron Spectroscope / Cycling Efficiency
Research Abstract

The electrolytic conductivity and charge-discharge characteristics of the lithium electrode were examined in the ternary solvent systems made up of ethylene carbonate (EC)-dimethylcarbonate (DMC) equimolar binary mixture with 3-mehylsydnone (3-MSD) and 3-ethylsydnone (3-ESD). The electrolytes used are LiClO_4, LiPF_6, LiBF_4, LiCF_3SO_3, LiN(CF_3SO_2)_2, and LiN(C_2F_5SO_2)_2. The order of the decrease in conductivities of ternary solvent electrolytes at mol ratio 0.5 of 3-MSD and 3-ESD is LiPF_6>LiClO_4>LiN(CF_3SO_2)_2 and LiN(C_2F_5SO_2)_2>LiBF_4>LiCF_3SO_3. The 1 mol dm^<-3> LiN(CF_3SO_2)_2 and LiN(C_2F_5SO_2)_2 electrolytes with large anions show the moderate conductivities of more than 6-7 mS cm^<-1> at mol ratio 0.5 of 3-MSD and 3-ESD.An addition of 3-MSD and 3-ESD to the EC-DMC equimolar binary mixture containing LiClO_4, LiBF_4, LiCF_3SO_3, and LiN(CF_3SO_2) is effective for the rise in lithium electrode cycling efficiency. It is found by using scanning electron microscope (SEM) that the cycling efficiency is dependent on the morphology and thickness of the film formed on the Ni (working) electrode. In addition, the film was found to be containing a certain nitrogen compound by using X-ray photoelectron spectroscope (XPS).

  • Research Products

    (6 results)

All Other

All Publications (6 results)

  • [Publications] Minoru Handa: "Physical Properties of 3-Ethylsydnone and the Alkyl Substituents"Chemistry Letters. 5. 457-458 (1998)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Satoshi Iinou: "Electrolytic Properties and Application to Lithium Batteries of 3-Propyl-4-methylsydnone-based Binary Solvent Electrolytes"Electrochemistry. 67. 22-26 (1999)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Yukio Sasaki: "Electrolytic Behavior and Application to Lithium Batteries of 3-Alkylsydnones-Dimethylcarbonate Electrolytes"Prog.Batteries and Battery Materials. 17. 239-241 (1998)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] H.Handa, T.Suzuki, H.Fukuda, and Y.Sasaki: "Physical Properties of 3-Ethylsydnone and the Alkyl substitutents"Chem.Lett.. 5. 457-458 (1998)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Y.Sasaki, K.Sekine, And M.Handa: "Electrolytic Behavior and Application to Lithium Batteries of 3-Alkylsydnone-Dimethylcarbonate Electrolytes"Prog.Batteries and Battery Materials. 17. 239-241 (1998)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] S.Iinou, M.Handa, and Y.Sasaki: "Electrolytic Properties and Application to Lithium Batteries of 3-propyl-4-methylsydnone- based Binary Solvent Electrolytes"Electrochem.stry. 67. 22-26 (1999)

    • Description
      「研究成果報告書概要(欧文)」より

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Published: 2002-03-26  

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