Lithium battery aluminum foil: the cornerstone of the new energy industry

At present, with the rapid development of new energy vehicles and energy storage technology, lithium batteries as the core driving force for progress in these fields, and their excellent performance and strict quality standards have become the cornerstone of the development of the industry. The importance of lithium battery Aluminum Foil, the core component of the positive electrode fluid collector, is self-evident, and is the key material to ensure the efficient and stable operation of lithium batteries.

一、The characteristics of lithium battery aluminum foil

Lithium battery aluminum foil, as the core material of lithium ion battery positive electrode fluid collection, its thickness is accurately controlled at about 0.01mm, showing extraordinary conductive, ductile and corrosion resistance characteristics. This ultra-thin and tough aluminum foil plays a key role inside the lithium battery, combining the tiny current generated by the active substance into a powerful power to ensure the efficient output of the battery. It is designed to maximize the contact area with the active substance, thereby optimizing the current transmission efficiency, and is an integral part of improving the overall performance of lithium batteries. The importance of fluid collection, as the "current commander" of lithium batteries, is self-evident. It is like a bridge connecting the active world inside the battery with the outside world, ensuring the smooth process of energy conversion. As the preferred material for positive collector fluid, aluminum foil meets this demanding application scenario with its excellent performance.

Electrical conductivity

The electrical conductivity of lithium battery aluminum foil is one of its core advantages. By evenly coating the surface of the aluminum foil with nano-conductive graphite and carbon-coated particles, the static conductivity of the aluminum foil can be significantly improved to ensure the smooth transmission of current inside the battery. This carbon-coated aluminum foil technology not only improves the energy density of the battery, but also extends the cycle life of the battery.

Ductility and corrosion resistance

Aluminum foil itself has good ductility and corrosion resistance, and can resist the volume change and electrolyte corrosion during the battery charging and discharging process to ensure the stability and safety of the battery. At the same time, the softness of the aluminum foil also enables it to fit tightly to other components inside the battery, reducing voids and improving the compactness and stability of the overall structure.

二、the role of aluminum foil in lithium batteries

Aluminum foil is one of the most commonly used positive collector materials in lithium-ion batteries. As an important part of the battery, the fluid collector has two main functions: first, as the carrier of the electrode coating layer, to ensure that the active material is evenly distributed on the fluid collector; The second is conduction, which exports the current from the inside of the battery by collecting fluid, so as to make up for the disadvantage of poor conductivity of the positive and negative electrode materials.

In lithium batteries, aluminum foil is mainly used for fluid collection of positive electrode materials. It can not only reduce the contact resistance between the positive electrode material and the collector, improve the adhesion ability between the two, but also significantly improve the energy density of the battery. These characteristics of aluminum foil enable the battery to make more efficient use of active substances during charging and discharging, thereby improving the overall performance of the battery.

三、the application prospect of aluminum foil in sodium-ion batteries

In addition to lithium-ion batteries, aluminum foil also has broad application prospects in sodium-ion batteries. As a new energy storage technology, sodium-ion battery has the advantages of abundant resources, low cost and high safety, and is considered to be an important development direction in the future energy storage field. In sodium-ion batteries, because aluminum is less active than sodium, sodium ions do not react with aluminum foil in the negative electrode, so aluminum foil can be used as a collector for both positive and negative electrodes.

This feature makes aluminum foil more widely used in sodium-ion batteries. It is estimated that each GWh sodium battery requires 700-1000 tons of aluminum foil, and the amount is more than 2 times that of lithium batteries. With the continuous maturity of sodium-ion battery technology and the acceleration of the commercialization process, the demand for battery aluminum foil will further increase, bringing new market opportunities for aluminum foil manufacturers.

四、future trends and prospects

Looking to the future, the role of lithium battery aluminum foil in battery production will be more prominent. With the continuous development of the new energy vehicle industry and the continuous progress of energy storage technology, the requirements for battery performance and safety will become higher and higher. This will prompt battery aluminum foil manufacturers to continuously improve the technical level and develop higher quality and higher performance battery aluminum foil products.