X-ray absorption spectroscopic study of LiCoO2 as the negative electrode of lithium-ion batteries.
Lithium cobalt oxide (LiCoO(2)) particles are modified using rotor blade grinding and re-annealing and used as the active electrode material versus lithium in the 3-0 V potential interval, in which a maximum capacity of 903 mA h g(-1) is achieved. X-ray absorption near edge structure spectra reveal the complete reduction of Co(3+) to Co metal at 0 V. Cell recharge leads to an incomplete reoxidation of cobalt. A maximum reversible capacity of 812 mA h g(-1) is obtained, although a poor capacity retention upon prolonged cycling may limit its application.
Chadwick
Alan V
AV
University of Kent, Centre for Materials Research, Canterbury, Kent CT2 7NR, UK.
Savin
Shelley L P
SL
Alcántara
Ricardo
R
Fernández Lisbona
Diego
D
Lavela
Pedro
P
Ortiz
Gregorio F
GF
Tirado
José L
JL