LCO Lithium cobalt(III) oxide
Single crystal
LCO Lithium cobalt(III) oxide Battery grade
Formula: LiCoO2
CAS: 12190-79-3
Physical Properties
Crystal Structure
Adopts a layered α-NaFeO₂-type hexagonal crystal system (space group R-3m), where Li⁺ and Co³⁺ ions occupy alternating layers of octahedral sites formed by oxygen anions23. Lattice parameters: a = 0.2814 nm, c = 1.4052 nm.Morphology & Appearance
Dark gray or blue-gray crystalline powder in bulk, with particle sizes typically optimized between 5–15 μm for battery applications. Insoluble in water but reacts with it under certain conditions.Density
True density: ~5.1 g/cm³3.
Chemical Properties
Redox Behavior
Acts as a strong oxidizer in acidic solutions, capable of oxidizing Cl⁻ to Cl₂ and Mn²⁺ to MnO₄⁻.Exhibits a reversible lithium deintercalation mechanism during charge/discharge, with a redox potential plateau around 3.9 V3.
Electrochemical Performance
Theoretical specific capacity: 274 mAh/g, but practical usable capacity is limited to ~140–155 mAh/g due to structural instability at deep lithium extraction (Li₁₋ₓCoO₂, x > 0.5)36.Synthesis
Prepared by calcining Li₂CO₃ and Co₃O₄ (or metallic cobalt) at 900°C under oxygen atmosphere
Lithium cobalt oxide can be categorized into single crystal and polycrystalline forms. However, most commercial products today are primarily high-temperature phase single crystals, while polycrystalline versions are rarely used due to performance limitations.
In contrast to ternary materials, the single crystal technology for lithium cobalt oxide has been developed earlier, benefiting from its layered structure, which is well-suited for single crystal preparation.
Research on polycrystalline lithium cobalt oxide is still largely in the laboratory stage and has not yet demonstrated practical applications in the market.
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25kg/drum;
Double-layer PE inner bag, outer plastic drum
Aluminum-plastic inner bag, outer plastic drum;