Lithium cobalt oxide, which is also called cobalt acid lithium, chemical formula for LiCoO2, is a kind of inorganic compounds, use commonly for lithium ion battery positive electrode material. The structure of the LiCoO2 have with X-ray diffraction, electron microscope and neutron powder diffraction technology research clearly. Atomic layer in lithium cobalt and oxygen atoms form positive octahedral between plate.Note: lithium cobalt oxide toxic, treatment should pay attention to safety.
In the lithium cobalt oxide, oxygen atoms cubic secret pile of sequence, Li + and Co3 + respectively located in cubic close packing oxygen layer alternate octahedral position, lattice constant a = 0.2816 nm, c = 1.4056 nm, c/a value is generally 4.899. But actually because of Li + and Co3 + and oxygen atoms layer of the force, the distribution of oxygen atom and not ideal tight reactor structure, but is deviating from the present three sides symmetry (space group for R3m).
For lithium cobalt oxide speaking, when circulation in all lithium discharge state that is LiCoO2 (3.8 V vs. Li) to half lithium charging state that is between Li0.5 CoO2, LiCoO2 is very stable. However, when more lithium from lattice in emerge to get more energy, its capacity will decay quickly. Take off in lithium process, Co3 + will be oxidized to unstable Co4 + dissolved in electrolyte, Co4 + increase might damage the positive cycle performance. In addition, the C axial shrinkage can also lead to capacity attenuation
More about: Lithium cobalt oxide sales
Read more: Chemical products
No comments:
Post a Comment