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Publish Time: 2021-11-23 Origin:https://www.hmaluminumsupply.com
Aluminum will form an aluminum oxide protective film in the air. It has high electrochemical potential and good corrosion resistance. In terms of mechanical properties, it is easy to process, has good mechanical strength, can be welded, riveted, and has good thermal and electrical conductivity. It is also of low cost, therefore it is often used as a positive electrode current collector for so many years.
At present, the aluminum foil for lithium battery is developing towards high purity. The grades are 1070, 1080, 1085 and 1060 aluminum foil. During the casting-rolling process, the casting-rolling and solidification processes occur almost at the same time. Therefore, the cast-rolled aluminum foil grains are more directional, with different longitudinal and lateral directions.
The inspection of battery aluminum foil includes outer packaging, appearance, thickness, width, areal density, material, welding performance, tensile strength, elongation, etc., according to different thicknesses and different alloys.
As the energy density of power batteries increases, the aluminum foil as the current collector is getting thinner and thinner, so it is required to have lower impurity content, less self-discharge, better thickness uniformity, higher surface tension, better bonding performance, thinner thickness, higher strength, higher electrical conductivity, suitable elongation, etc.
In order to increase the content of active substances, the surface coating technology of aluminum foil is also developing rapidly. Carbon-coated aluminum foil is to uniformly and delicately coat the dispersed nano-conductive graphite and carbon coated particles on the aluminum 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 material and the current collector, and can improve the adhesion between the two, which can reduce the use of adhesives. In turn, the overall performance of the battery is significantly improved.
Haomei Aluminum has different types of aluminum foil battery. Welcome to leave message below to inquire what you need.
With the development of dozens of years, we, Haomei Aluminum has solid base to provide clean aluminum material for the high-end applications including lithium-ion battery, lightweight automobile body, 3c products, aluminum brazing and other special uses.