What harm does lithium cobaltate have on people?

Introduction to lithium cobaltate

Liquid phase synthesis process of lithium ion secondary battery cathode material (lithium cobaltate), which uses polyvinyl alcohol (PVA) or polyethylene glycol (hook) aqueous solution as solvent, lithium salt, and cobalt salt are dissolved in PVA or pegged respectively In the aqueous solution, the mixed solution is heated to concentrate to form a gel, and the innate gel is further decomposed by heating, and then calcined at a high temperature, and the calcined powder is ground and sieved to obtain lithium cobaltate powder.

Advantages and disadvantages of lithium cobalt oxide

advantage

LiCoO2 is a good cathode material in lithium-ion batteries. It has the advantages of high working voltage, stable discharge, high specific energy, and good cycle performance. It is suitable for high-flow discharge and lithium ion insertion and extraction. It is obtained in lithium-ion batteries. Be the first to use. In addition, because it is easier to prepare, it is the only positive electrode material for lithium-ion batteries that have been put into production. However, the current lithium iron phosphate is also commercialized in the polar material, and it is more a bit called the future "life battery."

Disadvantage

The actual capacity of LiCoO2 is about 140 mA·h / g, which is only about 50% of the theoretical capacity (274 mAh / g), and during repeated charge and discharge, the activity is repeated due to repeated insertion and extraction of lithium ions. The structure of the substance changes after multiple shrinkage and expansion, resulting in an increase in the internal resistance of LiCoO2 and a decrease in capacity.

Method for synthesizing lithium cobaltate

1. freeze-drying method

2. ultrasonic treatment

3. Improved combustion synthesis

4. Sonochemical synthesis

5. Precipitation and the aging process

6. hydrothermal synthesis

7. Organometallic precursor method

Lithium cobaltate synthesis step

The company (No. 3): 6 h2o and LiOHH2O were ground in the air at 200 r / min, then heated at 400°C to obtain layered LiCoO, the structure.Li and the finite ratio were 1:1, respectively. 1:1.22 1:1.5.

Use of lithium cobaltate

Lithium cobaltate is widely used in high-power lithium-ion batteries.

What harm does lithium cobaltate have on people?

Lithium cobaltate is a lithium-ion battery material. Insoluble in water and organic solvents, will not cause acute poisoning reactions to humans. Chronic exposure may have an effect on the respiratory tract and digestive tract. Long-term exposure may cause some skin and mucous membrane damage. For example, the irritation of the respiratory tract may also have a certain effect on thyroid function. Respiratory and skin protection should be done.

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