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Surface structure change and electrode characteristics of carbon materials by fluorination reaction

Research Project

Project/Area Number 15550173
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeSingle-year Grants
Section一般
Research Field Inorganic industrial materials
Research InstitutionAichi Institute of Technology

Principal Investigator

NAKAJIMA Tsuyoshi  Aichi Institute of Technology, Department of Applied Chemistry, Professor, 工学部, 教授 (50026233)

Co-Investigator(Kenkyū-buntansha) OHZAWA Yoshimi  Aichi Institute of Technology, Department of Applied Chemistry, Associate Professor, 工学部, 助教授 (80278225)
Project Period (FY) 2003 – 2005
Project Status Completed (Fiscal Year 2005)
Budget Amount *help
¥3,800,000 (Direct Cost: ¥3,800,000)
Fiscal Year 2005: ¥1,100,000 (Direct Cost: ¥1,100,000)
Fiscal Year 2004: ¥1,100,000 (Direct Cost: ¥1,100,000)
Fiscal Year 2003: ¥1,600,000 (Direct Cost: ¥1,600,000)
KeywordsLithium ion battery / Carbon electrode / Graphite electrode / Surface fluorination / Plasma fluorination / 炭素負極 / 黒鉛負極 / 表面フッ素化 / フッ素化反応 / 表面修飾 / 電池特性 / 石油コークス
Research Abstract

(1)Surface structure change of petroleum cokes by fluorination
Petroleum coke and those heat-treated at 1860℃,2100℃,2300℃,2600℃ and 2800℃ were fluorinated by elemental fluorine at 150℃-300℃ for 2 min and by plasma treatment at 90℃ using CF_4. The fluorine contents obtained by elemental analysis were less than 1 at% and surface fluorine concentrations obtained by XPS were in the range of 5-20 at%. BET surface areas were not changed or slightly reduced by surface fluorination. However, surface disorder was increased. Transmission electron microscopic observation revealed that the edge plane of petroleum coke was closed by carbon-carbon bond formation during the graphitization process at high temperatures and surface fluorination opened the closed edge surface with increase in the surface disorder.
(2)Electrode characteristics of surface-fluorinated petroleum cokes in organic solvents
Electrode characteristics of surface-fluorinated petroleum coke samples were examined by cyclic voltammetry and galvanostatic charge/discharge cycling in 1 M LiClO_4 ethylene carbonate (EC)/diethyl carbonate (DEC) at 25℃. Cyclic voltammetry study showed that electrochemical decomposition of EC observed at 0.6 V vs Li/Li^+ was not changed for PC,PC1860 and PC2100,but significantly reduced for PC2300,PC2600 and PC2800. Charge/discharge experiments at current densities of 60 and 150 mA/g indicated that first coulombic efficiencies of PC2300,PC2600 and PC2800 were highly increased. This would be because the closed edge of graphitized petroleum cokes was opened by fluorination and the opening of the closed edge facilitated the surface film formation and Li^+ ion insertion.

Report

(4 results)
  • 2005 Annual Research Report   Final Research Report Summary
  • 2004 Annual Research Report
  • 2003 Annual Research Report
  • Research Products

    (18 results)

All 2006 2005 2004 2003 Other

All Journal Article (16 results) Book (1 results) Publications (1 results)

  • [Journal Article] Effect of surface fluorination the : electrochemical behavior of petroleum cokes for lithium ion battery2006

    • Author(s)
      Jianling Li
    • Journal Title

      J.Fluorine Chem. 126(2)

      Pages: 265-273

    • Related Report
      2005 Annual Research Report
  • [Journal Article] Effect of surface fluorination on the electrochemical behavior of petroleum cokes for lithium ion battery2005

    • Author(s)
      Jianling Li
    • Journal Title

      J. Fluorine Chem. 126(2)

      Pages: 265-273

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2005 Final Research Report Summary
  • [Journal Article] Surface fluorination and electrochemical behavior of petroleum cokes graphitized at medium and high temperatutres for secondary lithium battery2005

    • Author(s)
      Jianling Li
    • Journal Title

      J. Fluorine Chem. 126(7)

      Pages: 1028-1035

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2005 Final Research Report Summary
  • [Journal Article] Surface-fluorinated graphite anode materials for Li-ion batteries2005

    • Author(s)
      Henri Groult
    • Journal Title

      J. Fluorine Chem. 126(7)

      Pages: 1111-1116

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2005 Final Research Report Summary
  • [Journal Article] Effect of surface fluorination on the electrochemical behavior of petroleum ckes for lithium ion battery2005

    • Author(s)
      Jianling Li
    • Journal Title

      J.Fluorine Chem. 126(2)

      Pages: 265-273

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2005 Final Research Report Summary
  • [Journal Article] Surface fluorination and electrochemical behavior of petroleum cokes graphitized at medium and high temperatures for secondary lithium battery2005

    • Author(s)
      Jianling Li
    • Journal Title

      J.Fluorine Chem. 126(7)

      Pages: 1028-1035

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2005 Annual Research Report 2005 Final Research Report Summary
  • [Journal Article] Surface-fluorinated graphite anode materials for Li-ion batteries2005

    • Author(s)
      Henri Groult
    • Journal Title

      J.Fluorine Chem. 126(7)

      Pages: 1111-1116

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2005 Final Research Report Summary
  • [Journal Article] Pyrocarbon-coating on powdery hard-carbon using chemical vapor infiltration and its electrochemical characteristics2005

    • Author(s)
      Yoshimi Ohzawa
    • Journal Title

      J.Power Sources 146

      Pages: 125-128

    • Related Report
      2005 Annual Research Report
  • [Journal Article] Effect of surface fluorination on the electrochemical behavior of petroleum cokes for lithium ion battery2005

    • Author(s)
      Jianling Li
    • Journal Title

      J.Fluorine Chem. 126(In press)

    • Related Report
      2004 Annual Research Report
  • [Journal Article] Surface structure and electrochemical properties of surface-fluorinated petroleum cokes for lithium ion battery2004

    • Author(s)
      Tsuyoshi Nakajima
    • Journal Title

      J. Power Sources 133

      Pages: 243-251

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2005 Final Research Report Summary
  • [Journal Article] Influence of cointercalated HF on the electrochemical behavior of highly fluorinated graphite2004

    • Author(s)
      Tsuyoshi Nakajima
    • Journal Title

      J. Power Sources 137

      Pages: 80-87

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2005 Final Research Report Summary
  • [Journal Article] Surface structure and electrochemical properties of surface-fluorinated petroleum cokes for lithium ion battery2004

    • Author(s)
      Tsuyoshi Nakajima
    • Journal Title

      Power Sources 133

      Pages: 243-251

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2005 Final Research Report Summary
  • [Journal Article] Influence of cointercalated HF on the electrochemical behavior of highly fluorinated graphite2004

    • Author(s)
      Tsuyoshi Nakajima
    • Journal Title

      J.Power Sources 137

      Pages: 80-87

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2005 Final Research Report Summary 2004 Annual Research Report
  • [Journal Article] Surface structure and electrochemical properties of surface-fluorinated petroleum cokes for lithium ion battery2004

    • Author(s)
      Tsuyoshi Nakajima
    • Journal Title

      J.Power Sources 133

      Pages: 243-251

    • Related Report
      2004 Annual Research Report
  • [Journal Article] A study on the formation mechanism of graphite fluorides by Raman spectroscopy2003

    • Author(s)
      Vinary Gupta
    • Journal Title

      J. Fluorine Chem. 120(2)

      Pages: 143-150

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2005 Final Research Report Summary
  • [Journal Article] A study on the formation of graphite fluorides by Raman spectroscopy2003

    • Author(s)
      Vinay Gupta
    • Journal Title

      J.Fluorine Chem. 120(2)

      Pages: 143-150

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2005 Final Research Report Summary
  • [Book] Fluorinated Materials for Energy Conversion2005

    • Author(s)
      Tsuyoshi Nakajima
    • Total Pages
      578
    • Publisher
      Elsevier
    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2005 Annual Research Report 2005 Final Research Report Summary
  • [Publications] Gupta, Vinay: "A study on the formation mechanism of graphite fluorides by Raman spectroscopy"J.Fluorine Chem.. 120・2. 143-150 (2003)

    • Related Report
      2003 Annual Research Report

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Published: 2003-04-01   Modified: 2016-04-21  

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