Cathode properties of phospho-olivine LiMPO4 for lithium secondary batteries

Shigeto Okada, Shoichiro Sawa, Minato Egashira, Jun Ichi Yamaki, Mitsuharu Tabuchi, Hiroyuki Kageyama, Tokuzo Konishi, Akira Yoshino

Research output: Contribution to journalConference articlepeer-review

353 Citations (Scopus)


Four types of orthorhombic olivine LiMPO4 (M:Co, Fe, Ni and Mn) were investigated as high-voltage cathode active materials for lithium secondary batteries. LiCoPO4 exhibited the highest 4.8 V discharge plateau of 100 mAh/g versus Li/Li+ after initial charging to 5.1 V and its energy density was comparable to that of layered rocksalt LiCoO2 (120 mAh/g × 4 V = 480 mWh/g). In contrast, the open circuit voltage profile of LiFePO4 was 160 mAh/g on the 3 V plateau. The Co2+ state in LiCoPO4 was confirmed using HRXRF.

Original languageEnglish
Pages (from-to)430-432
Number of pages3
JournalJournal of Power Sources
Publication statusPublished - Jul 2001
Event10th International Meeting on Lithium Batteries - Como, Italy
Duration: May 28 2001Jun 2 2001

All Science Journal Classification (ASJC) codes

  • Renewable Energy, Sustainability and the Environment
  • Energy Engineering and Power Technology
  • Physical and Theoretical Chemistry
  • Electrical and Electronic Engineering


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