| The significance of mud resistivity |
| Slurry is an important intermediate product in the production process of lithium-ion batteries, and the uniformity and stability of the slurry greatly affect the consistency and electrochemical performance of the final battery cells. At present, the monitoring method for slurry only includes viscosity parameters, which cannot accurately evaluate the uniformity and stability of its electrical properties. And the conductivity parameters of the slurry are related to the slurry formula, types and contents of conductive agents, and binders |
| The type and content of the slurry have obvious correlation with the monitoring of the slurry production, and the slurry may appear gel precipitation after mixing and standing for a period of time, at which time the conductivity value will also change to varying degrees. Therefore, the conductivity of the slurry can be used as a method to characterize the uniformity and stability of the electrical properties of the slurry. |
| Monitoring the conductivity of the slurry can evaluate the influence of different active materials, conductive agents, binders, solid content, etc. on the electrochemical performance, which is used for material evaluation and screening; On the other hand, it can also be used for process stability monitoring, which can quickly identify abnormalities in the mixing process and avoid the waste of time and cost caused by defective products flowing into subsequent processes. |
| Principle of Mud Resistance Testing |
| Test steps: Place a certain volume of slurry (~80mL) in a measuring cup, insert a clean electrode pen, start the software, and start testing the changes in slurry resistivity over time at three pairs of electrodes, and save it in a file. |
| Test parameters: resistivity, temperature, time |
| Calculation formula: resistivity (Ω * cm): ρe=U/I*S/l |
