オリビン正極ＬｉｘＦｅＰＯ４の平衡電位と電気化学反応

• 中村 龍哉

  兵庫県立大学大学院工学研究科電気系工学専攻

• 松井 裕樹

  兵庫県立大学大学院工学研究科電気系工学専攻

• 山田 義博

  兵庫県立大学大学院工学研究科電気系工学専攻

• 田渕 光春

  産業技術総合研究所 関西センター

• 小林 陽

  電力中央研究所

書誌事項

タイトル別名

• Open Circuit Voltage of LixFePO4 Olivine Cathode and Its Electrochemical Reaction
• オリビン セイキョク Li x FePO4 ノ ヘイコウ デンイ ト デンキ カガク ハンノウ

抄録

Cathode using the olivine particles was subjected to an open-circuit voltage measurement under the relaxation condition of 24 h at each SOC and DOD states. The electrochemical reaction in the LiFePO₄ cathode was composed of a large plateau around 3.45 V with sloped regions nearby for both the fully charged and discharged states. It was found that the potential profile in the sloped regions exhibited a hysteresis. Furthermore, both sloped regions became narrower when the operating temperature was raised from 30 to 60°C. Furthermore, it was found that the apparent diffusion coefficient of Li⁺ ions in the sloped regions was much smaller than that in the plateau region. These facts implied that the obtained profiles were not in an equilibrium state with a quasi-OCV profile than the real one, and that the potential relaxation in the sloped regions took an extremely long time.

収録刊行物

• 粉体および粉末冶金

  粉体および粉末冶金 57 (11), 725-728, 2010

  一般社団法人 粉体粉末冶金協会

キーワード

• Lithium battery
• olivine cathode
• open circuit voltage
• hysteresis
• apparent diffusion coefficient

詳細情報

• CRID: 1390001206308061952
• NII論文ID: 10027408737
• NII書誌ID: AN00222724
• DOI: 10.2497/jjspm.57.725
• ISSN: 18809014
• ISSN: 05328799
• NDL書誌ID: 10917269
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I10917269
• 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: 使用不可