Consider battery production process requirements

Slurry preparation process: If it is used in the preparation of positive or negative slurry, it is necessary to choose a silicone defoamer that can break the foam quickly, inhibit the foam for a long time and does not affect the rheological properties of the slurry. For example, silicone defoamer containing special polyether modification can maintain good dispersion and defoaming effect in high solid content slurry, and will not cause agglomeration or precipitation of slurry.

Electrolyte production process: The defoamer used in the electrolyte must have good chemical stability and cannot react with the components in the electrolyte to affect the battery performance. Fluorosilicones have a good performance in this respect, with low surface tension and excellent chemical inertia, and can effectively defoaming without changing the properties of the electrolyte.
Battery assembly sealing link: The defoamer used in sealant and other materials should be compatible with the composition of the sealant, and does not affect the bonding performance and curing effect of the sealant. You can choose a silicon paste defoamer with good compatibility, which can be evenly dispersed in the sealant, eliminate bubbles and ensure the quality of the sealant.
Pay attention to the performance characteristics of defoamer


Defoaming efficiency: The selection of silicone defoaming agent with fast defoaming speed can reduce foam accumulation in the production process and improve production efficiency. The measurement indexes include initial defoaming time, defoaming rate, etc. The general emulsion type silicone defoaming agent has high defoaming efficiency and can rapidly reduce the foam height in a short time.
Foam suppression performance: In addition to rapid defoaming, long-term foam suppression performance is also important to prevent foam from being produced again. Polyether modified silicone defoamer has excellent performance in foam suppression, by introducing polyether chain segment on the silicone molecular chain, it can form a stable protective film on the liquid surface and inhibit the formation of foam.
Stability: including chemical stability, thermal stability and storage stability. In the high temperature, high humidity and other environments of battery production, the defoamer should maintain stable performance. For example, methylsilicone oil silicone defoamer has good thermal stability and can be used for a long time at higher temperatures without decomposition.
Consider product quality and environmental requirements


Purity and impurity content: The purity of the defoamer directly affects the performance and safety of the battery, especially in the production of batteries with extremely high impurity content requirements. Products with high purity and low impurity content should be selected to avoid problems such as internal short circuit and self-discharge of the battery due to the introduction of impurities.
Environmental protection: With the increasingly stringent environmental requirements, it is necessary to choose silicone defoamer that meets relevant environmental standards, such as halogen-free, phosphorus free, biodegradable, etc. Water-based silicone defoamer with water as the carrier has the characteristics of low VOC emission and environmental friendliness, which is more in line with the requirements of green production.
Refer to the supplier's service and reputation


Technical support: The supplier should have a professional technical team to provide timely and effective technical support, including the selection of defoamer suggestions, the use of guidance, on-site problem solving, etc. For example, when the battery production process changes, suppliers can provide suitable defoaming solutions according to the new situation.
Product quality stability: Choosing a reputable supplier with stable product quality ensures consistent performance and quality of the defoamer and avoids the impact of batch differences on battery production. The stability of product quality can be evaluated by examining the production equipment, quality management system and customer evaluation of the supplier.
Supply capacity and response speed: Suppliers should have sufficient production capacity and inventory to meet the large-scale production needs of battery companies, and respond quickly in emergency situations to ensure the timely supply of defoamer and avoid production stagnation due to raw material shortage.