Electrolyte Wetting Measurement System（EWS1100）
Brand: IEST
Product origin: Xiamen
Delivery time: About 6-8 weeks after placing the order
Supply capacity: About 20-40 sets/month
Introduction: Combining the visual acquisition system and the capillary action of the electrolyte to evaluate the wetting differences of different pole pieces, electrolytes, diaphragm formulations and processes.
Application: Evaluate the wetting performance of positive and negative electrode sheets, separators, and electrolyte formulations.
Parameters and Installation Requirements
| Model | Instrallation Requirement | ||
| Electrolyte Wettability Test System | EWS1100 | Power Supply | 220~240V/50~60Hz |
| Parameter | Voltage Variation Difference | ±10% | |
| Ambient Temperature | 0~50℃ | ||
| Stress Control Range | 0-500g | Ambient Humidity | ≤80%RH(no steam condensation) |
| Stess Resolution/Accuracy | 0.01g/±0.3%F.S | Ambient Magnetic Field | Keep away from strong electromagnetic fields |
| Suction Capactiy | 2µL | Size（W*D*H） | 560*430*470mm |
The Importance of Electrolyte Wetting
Electrolyte is the core part of lithium-ion battery (LIB) research and development. It is not only an important medium to ensure ion transmission, but also an important basis for the LIB to obtain high voltage and high specific energy. Relevant parameters of the electrolyte and its wettability to the electrode and separator directly affect the performance of the LIB.
The wetting effect of the electrolyte in the electrode is closely related to the compaction density, pore size, porosity and other parameters of the electrode itself. The evaluation of the wetting effect of the electrolyte in the electrode can be used as a key indicator for the process optimization of the electrode , and can also provide a new direction for the research and development of high-performance LIBs; Similarly, as one of the main materials of lithium-ion batteries, the separator also need a good wetting performance of the electrolyte. Therefore, it is necessary to develop a kind of equipment that can effectively evaluate and test the stability of electrolyte wettability
Traditional Test Methods
Creative Solutions
1. Based on the capillary diffusion principle of electrolyte in the electrode and diaphragm, quantitatively evaluate the difference of electrolyte infiltration.
2. Equipped with high-precision mechanical control and visual acquisition system, the test is stable and efficient.
3. It is applicable to the evaluation of infiltration difference of different electrode plates, electrolyte, diaphragm formula and process.
4. Real-time characterization of the wetting rate of the electrolyte in the sample.
Application Cases
Wettability Test of Negative Electrode of Lithium-ion Battery
| Negative 2g-4 group immersion - 50s | |||
| Number | Initial liquid level/mm | 50s Liquid height/mm | Height difference/mm |
| 1 | 11.065 | 7.234 | 3.831 |
| 2 | 10.888 | 7.133 | 3.755 |
| 3 | 11.218 | 7.609 | 3.609 |
| 4 | 11.408 | 7.425 | 3.983 |
| Mean | 11.1448 | 7.3503 | 3.7945 |
| σ | 0.1917 | 0.1825 | 0.1349 |
| COV | 1.72% | 2.48% | 3.56% |
