LiPF₆/PC系におけるリチウム表面膜のヒーリングプロセス. <i>In situ</i> QCM法による解析

• 森 満博

  東京農工大学工学部応用化学科

• 直井 勝彦

  東京農工大学工学部応用化学科

書誌事項

タイトル別名

• Healing Process of Surface Film on Lithium Metal in LiPF₆/PC. Analysis by <i>in situ</i> Electrochemical Quartz Crystal Microbalance
• LiPF6/PC系におけるリチウム表面膜のヒーリングプロセス--In situ QCM法による解析
• LiPF6 PCケイ ニ オケル リチウム ヒョウメン マク ノ ヒーリング プロセス In situ QCMホウ ニ ヨル カイセキ

抄録

In situ quartz crystal microbalance (QCM) analysis indicated an anomalous behavior, namely a mass increase, during the dissolution (discharge) process of lithium in a LiPF₆/propylene carbonate (PC) solution. Such behavior is unexpected in the dissolution of lithium and is only observed particularly in the LiPF₆/PC system. The authors identified this phenomenon as ``healing process’’ of the surface film on lithium metal and further investigated. From resonance frequency shift (Δf) and resistance parameter (ΔR), in the real time and the in situ QCM measurements, semi-quantitative analysis was made on the behavior with respect to the mass and roughness changes of the surface film produced continuously on the lithium metal With an increase in discharge current density (ranging from 0.05 to 2.50mA cm⁻²), the mass increase became pronounced. The healing process is induced initially by the release of lithium ions whereby forms the pores of lithium in which lithium metal is partially exposed or most of the cases already covered with Li₂CO₃, LiOH, Li₂O. The surface readily transformed to LiF by the reaction of them with HF (formed by the reaction of PF₆⁻ and a trace of H₂O) which lead to a mass gain.

収録刊行物

• Electrochemistry

  Electrochemistry 67 (1), 39-44, 1999-01-05

  公益社団法人　電気化学会

キーワード

• Lithium Metal
• Surface Film
• <i>In situ</i> QCM
• Healing Effect

詳細情報

• CRID: 1390845702323318144
• NII論文ID: 10002566007
• NII書誌ID: AN00151637
• DOI: 10.5796/electrochemistry.67.39
• ISSN: 21862451
• ISSN: 13443542
• NDL書誌ID: 111479
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I111479
• Web Site: https://www.jstage.jst.go.jp/article/electrochemistry/67/1/67_39/_pdf
• 本文言語コード: ja
• データソース種別:
  • JaLC
  • NDL
  • Crossref
  • CiNii Articles
• 抄録ライセンスフラグ: 使用可