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

Applications

1. Cathode: Lithium-rich Manganese-based Layered Oxides (LLOs)

• The coated LLOs exhibits superior pressure resistance, which corresponds to better structural stability and higher capacity retention after cell cycling.

• Single-particle crush measurements reveal the intrinsic relationship between mechanical properties and electrochemical stability in cathode materials at the microscale. This approach not only provides direct assessment criteria for evaluating and screening high-performance materials, but also drives optimization of surface modification strategies and construction of battery lifetime prediction models through quantitative, high-precision testing methodologies. It serves as a critical bridge connecting material design with practical applications.

2. Anode Material-SiC

• Two silicon-carbon materials with different electrode compaction.
• Comparison of crushing force distribution: A>B.
• Analysis of stress-displacement curves: Sample A exhibits initialmicro-crackingfollowed by complete collapse, while sample B expe-riences direct structural collapse and fragmentation.
• Comparison of Disintegration States: after fracturing, all three groups disintegrate into fine granular states.

Particle Compression Resistance and Powder Compaction

2.1 Two Different Pure Carbons

• The compressive resistance of particle level C1 is stronger. Corresponding to the powder end, C1has a higher compression modulus than C2, with both maximum deformation and irreversible deformation smaller than C2.

2.2 Three Different Carbon-Silicon Materials

• SC-3 has weaker compressive strength of its particles, resulting in significantly larger maximum deformation and irreversible deformation when the powder is compressed compared to theother two materials.

3. Ternary Cathode Material-NCM811

Case 1：

• Ternary cathode materials A1 and A2 are sintered from the same precursor but undergo different sintering processes, with both exhibiting a particle size D50 of 18 μm.

• A2 demonstrates superior compressive strength compared to A1, indicating that modifying the sintering process can enhance material hardness. The single-particle mechanical characterization method provides valuable guidance for optimizing sintering parameters.

Case 2：

• B1 and B2 are sintered from different precursors, both with a particle size D50 of 9.5 μm.

• They exhibit differences in: particle fracture mechanisms; powder compaction behavior; and coin cell cycling performance.

4. Sulfide Solid Electrolytes

• Samples ①, ②, and ③ represent sulfide samples synthesized through different preparation routes.

• Different preparation processes result in varying compressive resistance (compressive strength) of the prepared sulfide particles.

5. Non-battery Application: Polystyrene Microspheres

• Polystyrene microspheres of different types exhibit significant variations in compressive properties, deformation mechanisms, and fracture behaviors. These distinct characteristics determine their respective application scenarios.