Title :
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
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;
Conference_Titel :
Telecommunications Energy Conference, 2003. INTELEC '03. The 25th International
Conference_Location :
Yokohama, Japan
Print_ISBN :
4-88552-196-3
