Application fields of lithium manganate
Release time:
2021-08-03 14:56
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Company News
Mainly used in the manufacture of lithium-ion batteries for cell phones, notebook computers and other portable electronic devices as cathode materials.
Lithium-ion battery as cathode material: the advantages of carbon-coated aluminum foil in lithium battery applications
1. Inhibit battery polarization, reduce thermal effects, and improve rate performance;
2. Reduce the internal resistance of the battery, and significantly reduce the dynamic internal resistance increase during the cycle;
3. Improve consistency and increase battery cycle life;
4. Improve the adhesion between the active material and the current collector and reduce the cost of pole piece manufacturing;
5. Protect the current collector from being corroded by the electrolyte;
6. Improve the processing performance of lithium iron phosphate and lithium titanate materials.
Conductive coating
The surface treatment of battery conductive substrates with functional coatings is a breakthrough technological innovation. Carbon-coated aluminum foil/copper foil is to coat dispersed nano-conductive graphite and carbon coated particles evenly and delicately on aluminum foil/ On copper foil. It can provide excellent static electrical conductivity, collect the micro current of the active material, which can greatly reduce the contact resistance between the positive/negative electrode material and the current collector, and can improve the adhesion between the two, which can reduce the adhesion The amount of agent used, in turn, significantly improves the overall performance of the battery.
The coating is divided into two types: water-based (aqueous system) and oil-based (organic solvent system).
The performance advantages of carbon-coated aluminum foil/copper foil
1. Significantly improve the consistency of the battery pack and greatly reduce the battery composition cost. Such as: significantly reduce the dynamic internal resistance increase of the battery cell; increase the pressure difference of the battery pack; extend the life of the battery pack; greatly reduce the battery component cost.
2. Improve the adhesive force between the active material and the current collector, and reduce the manufacturing cost of the pole piece. Such as: improve the adhesion of the positive electrode material and the collector using the aqueous system; improve the adhesion of the nano- or sub-micron-scale positive electrode material and the collector; improve the adhesion of lithium titanate or other high-capacity negative electrode materials and the collector; Improve the qualified rate of pole pieces and reduce the cost of pole pieces.
After using carbon-coated aluminum foil, the adhesion of the pole piece is increased from the original 10gf to 60gf (using 3M tape or the 100-grid knife method), and the adhesion is significantly improved.
3. Reduce polarization, increase magnification and gram capacity, and improve battery performance. Such as: partly reduce the proportion of the binder in the active material, increase the gram capacity; improve the electrical contact between the active material and the current collector; reduce the polarization, and improve the power performance.
C-AL is carbon-coated aluminum foil, E-AL is etched aluminum foil, U-AL is light aluminum foil
4. Protect the current collector and prolong the service life of the battery. Such as: prevent the current collector from corrosion and oxidation; increase the surface tension of the current collector and enhance the easy coating performance of the current collector; it can replace the higher cost etching foil or replace the original standard foil with a thinner foil.
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Hunan Mengda New Energy Materials Co., Ltd.
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Address: No.22 Yongtai Road, Liuyang High-tech Industrial Development Zone
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