IEST Electrode Tortuosity Tester & Separator Ion Conductivity Tester(EIC Series)

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