Olivine LiCoPO[sub 4] as 4.8 V Electrode Material for Lithium Batteries

Reversible extraction and insertion of lithium from and into olivine at vs. lithium have shown that this material is a good candidate for a high‐voltage lithium‐ion battery. Electrochemical extraction was limited to 0.42 lithium per formula unit, with a charge capacity of and a discharge capacity of . In this case. the material retains its structural integrity with a slight contraction of the unit cell upon cycling. The crystallinity of the electrode during charge and discharge processes was not affected, as deduced from the sharpness of the X‐ray diffraction peaks of the cycled cathode material. ©2000 The Electrochemical Society