Lithium cobalt oxide

Lithium cobalt oxide

Names
IUPAC name lithium cobalt(III) oxide
Other names lithium cobaltite
Identifiers
CAS Number	12190-79-3 Y
ECHA InfoCard	100.032.135
PubChem	23670860
Properties
Chemical formula	LiCoO 2
Molar mass	97.87 g mol−1
Hazards
Main hazards	harmful
R-phrases	R42/43
S-phrases	S36
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
N  (what is YN ?)
Infobox references

Lithium cobalt oxide (LiCoO
2) is a chemical compound commonly used in the positive electrodes of lithium-ion batteries. The structure of LiCoO
2 has been studied with numerous techniques including x-ray diffraction, electron microscopy, neutron powder diffraction, and EXAFS: it consists of layers of lithium that lie between slabs of octahedra formed by cobalt and oxygen atoms. The space group is ${\displaystyle R{\bar {3}}m}$ in Hermann-Mauguin notation, signifying a rhombus-like unit cell with threefold improper rotational symmetry and a mirror plane. More simply, however, both lithium and cobalt are octahedrally coordinated by oxygen. These octahedra are edge-sharing, and tilted relative to the layered structure. The threefold rotational axis (which is normal to the layers) is termed improper because the triangles of oxygen (being on opposite sides of each octahedron) are anti-aligned.