Structure and cathode properties of LiCoPO/sub 4/ and Li/sub 2/CoPO/sub 4/F for high-voltage Li-ion batteries

Author

Okada, Shigeto ; Ueno, Mizuki ; Uebou, Yasushi ; Yamaki, Jun-ichi

Author_Institution

Inst. for Mater. Chem. & Eng., Kyushu Univ., Japan

fYear

2003

fDate

23-23 Oct. 2003

Firstpage

66

Lastpage

71

Abstract

As a new high-voltage cathode candidate for post 4 V cathode, ordered-olivine LiCoPO/sub 4/ and fluoride phosphate Li/sub 2/CoPO/sub 4/F were synthesized by solid-state reaction. Their structures were identified by neutron diffraction. The 5 V discharge profiles were demonstrated using coin-type cells. Two important issues for commercial use, metal dissolution and oxygen release at elevated temperature, were tested.

Keywords

cathodes; cobalt compounds; electrochemical electrodes; lithium compounds; neutron diffraction; phosphorus compounds; secondary cells; 4 V; 5 V; Li; Li/sub 2/CoPO/sub 4/F; LiCoPO/sub 4/; coin-type cells; fluoride phosphate; high-voltage cathode; high-voltage lithium-ion batteries; metal dissolution; neutron diffraction; oxygen release; solid-state reaction; Atomic layer deposition; Atomic measurements; Batteries; Cathodes; Chemistry; Electromagnetic wave absorption; Neutrons; Powders; Solid state circuits; Voltage;

fLanguage

English

Publisher

ieee

Conference_Titel

Telecommunications Energy Conference, 2003. INTELEC '03. The 25th International

Conference_Location

Yokohama, Japan

Print_ISBN

4-88552-196-3

Type

conf

Filename

1252093