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Dongguan Datapower New Energy Co.,ltd is a high-tech production enterprise which specialize in the R&D and production&sale of lithium polymer batteries,drone battery,airplane batteries &battery pack etc.
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release time:2024-03-14 Hits: Popular:AG11 battery
Research on new 18650 battery 3.7v 2200mah anode material bimetallic MOF
Research on bimetallic MOF, a new anode material for lithium-ion batteries. While preparing MOFs with novel structures, using MOFs as templates to synthesize 18650 battery 3.7v 2200mah anode materials is a challenging research direction. How to effectively synthesize such materials and improve their conductivity is the key to their use in 18650 battery 3.7v 2200mah anodes. This type of material has high discharge specific capacity and good cycle stability.
At present, commercial lithium-ion batteries still use carbon-based negative electrode materials such as natural graphite and artificial graphite. Graphite negative electrode materials have the advantages of large reversible capacity, stable structure, and good conductivity. However, their potential is close to that of metallic lithium, and the battery will be overcharged. Lithium dendrites may precipitate on the electrode surface to form lithium dendrites, thereby piercing the separator and causing a short circuit, which poses a major safety risk. In practice, the reversible specific capacity of carbon materials has reached 350mAh/g, which is close to the theoretical specific capacity of 372mAh/g.
As one of the main materials of lithium batteries, the importance of negative electrode materials does not need to be emphasized. The negative electrode material is the carrier of lithium ions and electrons during the charging process of lithium batteries, and plays a role in the storage and release of energy. In the battery cost, negative electrode materials account for about 5%-15% and are one of the important raw materials for lithium-ion batteries.
Research on new 18650 battery 3.7v 2200mah anode material bimetallic MOF
As energy problems become increasingly serious, lithium-ion batteries with high energy density and lightweight rechargeable batteries are increasingly used in electric vehicles and portable power tools. Currently, the theoretical capacity of commercially available 18650 battery 3.7v 2200mah anode material graphite is only 372mAh/g. Therefore, the development of new anode materials is of great significance for the application of lithium-ion batteries.
Metal-organic frameworks (MOFs) are currently widely used in energy storage, gas separation, industrial catalysis, and drug-loading systems because of their large specific surface area and controllable structural units.
A new MOF, ZnCo-ZIF, was synthesized using a bimetallic mode and applied to the negative electrode material of lithium-ion batteries, achieving a capacity of 636mAh/g, which is 1.7 times higher than that of graphite electrodes. In the 18650 battery 3.7v 2200mah with CoZn-ZIF as the negative electrode material, a secondary discharge capacity of 636.3mAh/g was achieved; at the same time, after 100 cycles, the battery still maintained a capacity of 605.8mAh/g, and the Coulombic efficiency was close to 100%.
The researchers found that co-precipitation technology can effectively adsorb metal cations to the surface of carbon nanotubes rich in oxygen-containing groups. After adding an organic ligand solution, the ligands coordinate with the metal ions on the surface of the carbon nanotubes to form MOF crystal nuclei. , the crystal nucleus grows into a MOF crystal, and finally the carbon nanotubes are embedded in-situ into the MOF. After heat treatment, multi-metal oxide nanocomposites with new structures can be prepared.
In the voltage range of 0.01-3.0V, after charging and discharging 100 times at a current density of 100mAg-1, the specific capacity of this type of nanocomposite material is stable at more than 813mAhg-1; when the charge-discharging current density is 1000mAg-1, the specific capacity is still as high as 514mAhg -1, showing excellent electrochemical energy storage properties.
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