Cobalt(III) lithium oxide

Cobalt(III) lithium oxide


The first generation of commercial cathode materials for lithium-ion batteries have many irreplaceable advantages: good processing performance, high density, relatively high specific capacity, stable structure, good cycling performance, high voltage platform and relatively stable. It is the most mature and the only commercial cathode material at present, especially in the field of communication batteries in a short time There are also irreplaceable advantages。
Disadvantages: expensive, capacity almost to the limit, lack of resources, poor security and other defects make it inevitable to be replaced in the last 5 to 10 years. At present, there are two directions to replace lithium cobalt oxide. One is in the field of power battery, lithium manganate and lithium ferrophosphate are the most promising materials. The other is in the field of communication battery, nickel cobalt lithium and nickel cobalt manganese lithium ternary materials are the most promising cathode materials to replace lithium cobalt oxide. The liquid phase synthesis process of lithium ion two battery positive electrode material (lithium cobalt oxide) is made by using polyvinyl alcohol (PVA) or polyethylene glycol (PEG) aqueous solution as solvent, and lithium and cobalt salts dissolved in PVA or PEG aqueous solution respectively. After mixing, the solution is heated to form gel. The gel is then heated and decomposed and then calcined at high temperature. The lithium cobalt oxide powder is obtained by grinding and sieving the sintered powder. Compared with the prior art, the invention has the advantages of low synthesis temperature, high purity, uniform chemical composition, etc. The automatic f-sorb2400 specific surface area tester was used.
1. Excellent electrochemical performance
a. The average capacity attenuation of each cycle is less than 0.05%
b. The first discharge capacity is more than 135mah / g
c. 3.6V initial discharge platform ratio > 85%
2. Excellent processability
3. The high tap density is helpful to improve the volume specific capacity of the battery
4. The product has stable performance and good consistency
Product model
The tap density of r747 is 2.4-3.0g/cm3, the typical value is 2.5, and the particle size is d506.0-8.5um;
The tap density of r757 is 2.4-3.2g/cm3, the typical value is 2.6, and the particle size is d506.5-9.0um;
The tap density of r767 is 2.3-3.0g/cm3, the typical value is 2.5, and the particle size is d508-12um;
technical standard
1. Title: LiCoO2 molecular formula: LiCoO2 molecular weight: 97.88
2. Main application: lithium ion battery
3. Appearance requirements: gray black powder, no caking
4. X-ray diffraction: compared with jcds standard (16-427), there was no impurity
5. Package: packed in plastic bag in iron bucket
6. Chemical composition and physical property index:
Project items scope
Ni 0.05% max (wt%)
Mn 0.01% max (wt%)
Fe 0.02% max (wt%)
CA 0.03% max (wt%)
Sodium 0.01% max (wt%)
PH 9.5-11.5
Moisture content (105oC dry weight loss,%) moisture (wt% lossat105oc) < 0.05
Specific surface area (m2 / g) betsurfacearea (m2 / g) 0.2-0.6
Tap density (g / cm3) 1.7-2.9
Particle size-d50 (μ m) psd-d50 (μ m) 5-12
Particle size - D10 (μ m) psd-d10 (μ m) 1-5 particle size - D90 (μ m) psd-d90 (μ m) 12-25