ZHENGSHAN TECHNOLOGY

In modern energy storage technology, batteries are a key component whose performance directly affects the efficiency of electronic devices and electric vehicles. As an indispensable material in the battery manufacturing process, the quality and characteristics of electrode paste have a crucial impact on the overall performance of the battery. This article will delve into the relationship between electrode paste and battery performance, analyze its key factors and countermeasures.
1、 The basic function of electrode paste
Electrode paste, usually composed of conductive materials, adhesives, and solvents, is a carrier for the active material of battery electrodes. In battery manufacturing, electrode paste is applied onto the electrode substrate to form the positive and negative electrodes of the battery. The main functions of electrode paste include:
Provide conductivity: Conductive materials such as carbon black or conductive polymers can improve the conductivity of electrodes, ensuring efficient current transfer during battery discharge and charging processes.
Ensure adhesion: Adhesive is used to firmly adhere the active substance to the electrode substrate, preventing peeling during battery use.
Adjusting viscosity and processability: By adjusting the viscosity of the electrode paste, ensure its uniformity and stability during coating and drying processes.
2、 The influence of electrode paste on battery performance
conductivity
The conductive material in the electrode paste directly affects the conductivity of the electrode. Highly conductive electrode paste can significantly improve the charging and discharging efficiency of batteries, reduce internal resistance, and thus enhance the overall performance of batteries. The optimization of the type and distribution of conductive materials, as well as the amount of additives, are key factors. For example, the use of highly conductive materials such as carbon nanotubes and graphene can significantly improve the conductivity of electrodes.
Mechanical strength and stability
The adhesive in the electrode paste determines the mechanical strength and stability of the electrode. Good adhesion can ensure that the electrode will not peel off or detach during the charging and discharging process, ensuring the long life and stability of the battery. Different types of adhesives, such as polyvinylidene fluoride (PVDF) and polyurethane (PU), have different characteristics and need to be selected and optimized according to actual needs.
Ion transport capability
The composition and structure of electrode paste have a significant impact on ion transport. Optimizing the pore structure of electrode paste can improve ion mobility, reduce the electrochemical impedance inside the battery, and thus enhance the charging and discharging rate of the battery. Appropriate porosity and uniform distribution of conductive materials are key factors in enhancing ion transport capacity.
thermal stability
The working stability of batteries in high temperature environments is also affected by electrode paste. At high temperatures, the chemical stability and mechanical strength of electrode paste may decrease, thereby affecting the safety and performance of the battery. Therefore, selecting high-temperature stable materials and optimizing the formulation of electrode paste are crucial for improving the performance of batteries under extreme conditions.
3、 Optimization strategy for electrode paste
Optimize material selection
Choosing appropriate conductive materials and adhesives can significantly improve the performance of electrode paste. For example, using highly conductive carbon materials and adhesives with excellent adhesion can reduce production costs while ensuring battery performance.
Adjust the formula ratio
By adjusting the proportion of each component in the electrode paste, the production process can be optimized while meeting the performance requirements of the battery. A reasonable formula can improve the conductivity, adhesion, and mechanical strength of electrodes.
Improve the preparation process
Improving the preparation process of electrode paste, such as controlling mixing time, grinding particle size, etc., can enhance the uniformity and stability of the electrode paste, thereby improving the performance of the battery.
Introducing new materials
With the development of technology, new conductive materials and adhesives continue to emerge. For example, the introduction of nanomaterials and polymer materials may bring breakthroughs in performance. Continuously monitoring the research progress of new materials and their application in electrode paste can further improve the performance of batteries.