Description
1. Creative Solution One
1.1 Creative Solution:
- Calculate the MacMullin number of the electrode by testing the EIS of the symmetric cell.
- Simplify assembly, automate testing and analysis processes, streamline operation steps,and enhance testing efficiency.
- Synchronous testing across four channels.
1.2 Testing Principle:
- Assemble symmetric batteries and conduct EIS testing.
- As shown in the figure below, low-frequency segments of the EIS spectrum separately. The diference between the intersection of the fitting curves and the X-axis multiplied by 3 is the ionic resistance of the electrode coating.
- Using the following formula, the MacMulin number can be calculated, This allows for the pre-evaluation of the electrochemica performance of the electrode after it is assembled into a cell. Therefore, characterization and compaison ofthe ionic conductivity of the electrode coating are particularly important.
2. Creative Solution Two
Updated on Feb. 8, 2025
Applications
Case 1. Different compaction density of positive electrodes
Summary:
- The consistency of ElS testing for symmetric battery of electrodes is generally good.
- Within a certain range of compaction density, as the compaction increases, the ionic resistance/MacMullin numb also increases.
Case 2. Different compaction density of negative electrodes
Summary:
- The consistency of ElS testing for symmetric battery of electrodes is generally good.
- Within a certain range of compaction density, as the compaction increases, the ionic resistance/MacMullin numb also increases.
Case 3. The correlation between electrode tortuosity and electrochemical performance(Gr negative electrodes of different thicknesses)
Summary:
- As the thickness of the electrode increases, its tortuosity also increases, However, the rate performance of the battery decreases with increasing thickness.
- This indicates that the rate performance of the battery decreases with increasing tortuosity. There is a certain correlation between electrode tortuosity and rate performance of battery.
Case 4. Different coated separators(Ionic conductivity testing of four different coated separators)
Summary:
- Test the EIS of 1-4 layers of separators to obtain R1, R2, R3, R4.
- Plot a curve with the number of separator layers as the x-axis and separator resistance as the y-axis. Calculate the slope and linear fitting degree of the curve, with the linear fitting degree ≥0.99.
- Calculate the separator ionic conductivity according to the formula.
Updated on Feb. 8, 2025
Video
Updated on Feb. 8, 2025
Specifications
Updated on Feb. 8, 2025
