The importance of self-baking electrode paste in battery manufacturing
In the field of battery manufacturing, especially in the production process of lithium-ion batteries, the application of self-baking electrode paste (also known as electrode paste) and its subsequent self-baking process play a vital role.This process not only affects the performance of the battery, but also is directly related to the safety and service life of the battery.This article will discuss in detail the importance of self-baking electrode paste in battery manufacturing.
1. Definition and preparation of self-baking electrode paste
Self-baking electrode pastes are usually made from raw materials such as anthracite, coke, asphalt and tar after mixing, crushing, screening, and batching, and then calcined and kneaded at high temperature.After these raw materials are mixed at specific temperatures and conditions, an electrode paste with electrical conductivity and good sintering properties is formed.After the electrode paste is loaded into the electrode shell, it is further sintered and formed by a self-baking process to form the final electrode.
2. The importance of self-baking electrode paste
a. Improve battery performance
Baking is a key part of the electrode preparation process, and one of its main purposes is to remove moisture and solvents from the electrode paste.These solvents and moisture will decompose at high temperatures to produce gases, which will adversely affect the performance and safety of the battery.Through the baking process, the moisture and solvent in the electrode material can be effectively removed, thereby improving the discharge performance and capacity of the battery.In addition, baking can also improve the physical and chemical properties of the material, such as improving the crystallinity and grain size of the material, which is conducive to charge transfer and ion diffusion, and further improve the performance of the battery.
b. Ensure battery safety
The baking process can not only remove moisture and solvents, but also reduce the generation of gas inside the battery, thereby reducing the internal pressure of the battery and the risk of thermal runaway.This is essential to improve the safety of the battery.In lithium-ion batteries, trace amounts of moisture may cause battery performance to degrade or even fail, and in severe cases, it can cause safety accidents.Therefore, through a strict baking process, the moisture content in the electrode material can be ensured to meet safety standards, thereby ensuring the overall safety of the battery.
c. Optimize battery life
The baking process can also improve the cycle stability and life of the battery by improving the adhesion between the electrode material and the electrolyte.Good adhesion between the electrode material and the electrolyte helps to reduce the shedding and peeling of the battery during use, thereby extending the service life of the battery.In addition, baking can also improve the structural stability and heat resistance of the electrode material, so that the battery can still maintain stable performance in harsh working environments.
3. Application advantages of self-baking electrode paste
Compared with traditional carbon electrodes, self-baking electrodes have the advantages of simple process and low cost.Its manufacturing cost is only one-eighth that of graphite electrodes and one-third that of carbon electrodes.This low-cost advantage makes self-baking electrodes widely used in industrial fields such as ferroalloy electric furnaces and calcium carbide furnaces.At the same time, the sintering capacity of the self-baking electrode has the characteristics of self-adjustment, which can adapt to the needs of different working conditions.
