What is the specific application and role of electrode paste in batteries?

The specific application and role of electrode paste in batteries are mainly reflected in the following aspects:

1. The electrode of the battery: the electrode paste is the main component of the battery electrode. In the battery production process, the electrode is rubbed on the collector fluid (such as copper foil or aluminum foil), and then after drying and compacting processes, forming the positive or negative electrode of the battery. The performance of the electrode paste directly affects the electrochemical performance of the battery, such as capacity, cycle life and rate performance.

2. Improve the conductivity of the electrode: conductive materials in the electrode paste (such as graphite, carbon black, etc.) can improve the conductivity of the electrode and reduce the internal resistance of the battery, thereby improving the charging and discharging efficiency and power output of the battery. In addition, conductive materials can also improve the stability of the electrode and prevent structural changes in the electrode during charging and discharging.

3. Protect the active substance: the binder and plasticizer in the electrode paste can closely combine the active substance (such as lithium cobaltate, lithium iron phosphate, etc., of lithium-ion batteries) with the conductive material to form a stable electrode structure. This helps protect the active substance from being destroyed during charging and discharging, thereby improving the cycle life and stability of the battery.

4. Adjust the performance of the electrode: the filler in the electrode paste (such as silicon dioxide, calcium carbonate, etc.) can adjust the consistency, density and porosity of the electrode and other performance indicators. Through reasonable selection and addition of fillers, the structure and performance of the electrode can be optimized to meet the needs of different battery types and applications.

In short, the role of electrode paste in the battery is crucial, it not only constitutes the electrode of the battery, but also has an important impact on the electrochemical performance of the battery by improving the conductivity, protecting the active substance and regulating the performance.