Sodium carboxymethyl cellulose: Multifunctional application of lithium battery binder
Publish Time: 2025-02-24
Sodium carboxymethyl cellulose (CMC-Na), as an important product among cellulose derivatives, has shown broad application prospects in many fields due to its unique physical and chemical properties. Especially in the field of lithium battery manufacturing, CMC-Na has become the main binder of water-based system negative electrode materials with its excellent water retention, adhesion, dispersibility and thickening properties, and plays a key role in improving the cycle life and performance of batteries.1. Preparation and properties of sodium carboxymethyl celluloseSodium carboxymethyl cellulose is an anionic polymer with an ether bond structure prepared by multi-reaction with cellulose as the main raw material. It is non-toxic, tasteless, odorless, easily soluble in water, and can form a transparent colloidal solution. CMC-Na has stable viscosity, narrow molecular weight distribution, and uniform degree of substitution, which makes it show excellent performance in various applications.2. Application of sodium carboxymethyl cellulose in lithium batteriesBinder function:In the manufacturing process of lithium batteries, CMC-Na, as the main binder of negative electrode materials, can effectively bind active substances, conductive agents and current collectors together to form a stable electrode structure.Its strong adhesion can ensure that the electrode is not easy to fall off during the charging and discharging process, thereby improving the cycle life of the battery.Dispersion effect:CMC-Na has good dispersibility and can evenly disperse the negative electrode active material and conductive agent in the slurry to prevent the agglomeration and sedimentation of particles.This helps to improve the capacity and cycle performance of the battery.Thickening effect:As a thickener, CMC-Na can increase the viscosity of the negative electrode slurry and make it more stable.This helps to prevent the slurry from flowing and dripping during processing and improve the manufacturing efficiency of the battery.Other effects:CMC-Na also has good emulsification and solution fluidity, and can be fully mixed with other ingredients to form a uniform electrode system.In addition, its product compatibility is good and can be compatible with a variety of battery materials without negatively affecting battery performance.3. Advantages of sodium carboxymethyl celluloseStable performance: CMC-Na has stable viscosity, narrow molecular weight distribution, and uniform degree of substitution, which makes it show excellent performance stability in the manufacturing process of lithium batteries.Environmental protection and safety: CMC-Na is non-toxic, tasteless, and odorless, which meets environmental protection requirements and will not cause harm to the environment and human health.Multifunctionality: CMC-Na not only has bonding, dispersing and thickening effects, but also has good water retention, emulsification and solution fluidity, which can meet various needs in the manufacturing process of lithium batteries.As a multifunctional application material for lithium battery binders, sodium carboxymethyl cellulose has excellent performance stability and environmental safety. It plays a key role in the manufacturing process of lithium batteries and can improve the cycle life and performance of batteries. With the continuous development of lithium-ion battery technology, the application prospects of CMC-Na and its derivatives in the field of lithium-ion batteries will be broader. In the future, we will continue to explore the application potential of CMC-Na in more fields and make greater contributions to promoting scientific and technological progress and social development.
