Nano aluminum oxide lithium cobalt oxide for lithium batteries

型号：

VK-L30D

粒径nm：

25-35

含量%：

99.99

Nano-alumina for lithium batteries is a nano-powder with small and uniform particle size, high purity and excellent surface properties produced by our company through special processing technology based on the performance of the battery and battery materials. It is widely used in various lithium batteries. , alkaline batteries, solar cells, etc. and other batteries, improve the energy storage performance and safety performance of the battery, and play a role in energy conservation and environmental protection.
Technical indicators:
Itembr>Indicators
Model
Appearancebr>White powder
Content﹪ .
Specific surface area,
Particle size< br/>Value
Heating loss, %.
Ignition weight loss (%).
Application characteristics:
,
Nano aluminum oxide is used as lithium battery electrode coating The layer can effectively play the role of heat insulation and insulation, and improve safety performance. Doping aluminum into lithium cobalt oxide can form a solid solution, stabilize the crystal lattice, and improve rate performance and cycle performance.
Coating lithium cobalt oxide with nano-alumina can improve thermal stability, improve cycle performance and overcharge resistance, inhibit the generation and decomposition of oxygen, avoid direct contact with the electrolyte, and reduce battery life. The chemical specific capacity is lost, thereby increasing the electrochemical specific capacity.
The doping of aluminum ions in nano-alumina can increase the voltage of the battery, thereby improving the safety of the battery. Nano-alumina is used to modify spinel lithium manganate materials to produce reversible batteries. The capacity reaches grams, the number of cycles, the capacity retention rate is greater than %, which is better than the level of similar international products. It is the first material in China that can be used in high-power lithium-ion batteries.
Application of nano-aluminum oxide in lithium-ion batteries:
1: Used for battery negative electrode coating
High-purity nano-aluminum oxide has the properties of insulation, heat insulation and high temperature resistance
As the capacity of lithium-ion rechargeable batteries continues to increase, the energy accumulated inside becomes larger and larger, and the internal temperature will increase. It is possible that the negative electrode separator will melt due to excessive temperature, causing a short circuit. If the separator is coated with A layer of nano-alumina coating can prevent short circuits between electrodes.
Improve the safety of lithium battery use.
Two: Lithium-ion battery materials are mixed, mainly coating
Coating generally refers to surface coating of materials such as lithium cobalt oxide, lithium manganate, lithium titanate, and lithium iron phosphate.
The nanometer-thick coating layer will greatly reduce the interface impedance, provide an additional electron transmission tunnel, greatly prevent the erosion of the electrode by the electrolyte, and can accommodate the volume change of the particles during the + and deintercalation process, preventing Damage to the electrode structure. Electrochemical tests show that the first discharge capacity, cycle performance, high temperature performance, and rate performance of the sample with .% coating have been significantly improved. An excessively thick coating layer will lead to the deterioration of electrochemical performance.