IEST Electrolyte Wetting Testing System(EWS/ETS/CHT)

Introduction: Combining the visual acquisition system and the capillary action of the electrolyte to evaluate the wetting differences of different electrodes, electrolytes, diaphragm formulations and processes.

Features:

  1. Based on the principle of capillary diffusion of electrolyte in the electrodes and separators, quantitatively evaluate the difference in electrolyte infiltration;
  2. Equipped with high-precision mechanical control and visual acquisition system, the test is stable and efficient;
  3. Suitable for evaluation of infiltration differences of different electrodes, electrolytes, separator formulas and processes;
  4. Characterize the infiltration rate of electrolyte in the sample in real time.

Applications:

  • Electrolyte: Performance Evaluation
  • Electrode: Consistency Assessment
  • Optimization of material: Electrode Surface Treatment Processes

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Description

1. Principle of Electrode Wetting

The Lucas–Washburn Equation is commonly used to describe the dynamic of liquid absorption in electrode pores, as represented by the equation below:

  • r represents the radius of the capillary (m),
  • σ represents the surface tension of the imbibition fluid (N/m),
  • η represents the viscosity of the imbibition fluid (Pa*s),
  • θ represents the contact angle of the wet phase (°),
  • h represents the liquid suction height (m),
  • t represents the liquid suction time,
  • cr represents a fixed value, called the formal radius.

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2. Applications

  • Electrolyte: Performance Evaluation
  • Electrode: Consistency Assessment
  • Optimization of material: Electrode Surface Treatment Processes

2.1 Capillary Wetting System-EWS Series

Key Features:

  • Equipped with a high-precision vision testing system for stable and efficient testing repeatability.
  • In-situ real-time characterization of electrolyte wetting rateon negative electrode sheets of lithium-ion batteries.
  • Applicable Samples: Negative electrode sheets.
  • The greater the compacticion of the electrode sheet, the lower the porosity, resulting in poorer electrolyte wetting.

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2.2 Weight Wetting System-ETS Series

Key Features:

  • Equipped with a high-precision weighing system for stable and efficient testing repeatability.
  • In-situ real-time characterization of electrolyte wetting rate on positive and negative electrode sheets of lithium-ion batteries.
  • Applicable samples: Anode electrodes & Jelly Cells

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2.3. Height Wetting System-CHT Series

Key Features:

  • Equipped with a high-precision vision acquisition system for stable and efficient testing repeatability.
  • In-situ real-time characterization of electrolyte wetting rate on positive and negative electrode sheets of lithium-ion batteries.
  • Applicable samples: Anode electrodes

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Applications

1. Capillary Wetting System-EWS Series

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  • The greater the density of the electrode, the lower the porosity and the worse the electrolyte wettability.

2. Weight Wetting System-ETS Series

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  • Trimming three sets of negative electrode sheets from the same batch (65*70mm)

3. Height Wetting System-CHT Series

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  • The slopes of the 3 tested electrodes are consistent with each other, so is the wetting consistency of their electrolytes.

Video

IEST Electrolyte Wetting Testing System - Capillary Method

IEST Electrolyte Wetting Testing System - Gravimetry Method

IEST Electrolyte Wetting Testing System - Height Method

Specifications

Capillary Wetting System-EWS Series

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Weight Wetting System-ETS Series

IEST Electrolyte Wetting Testing System Details-9

Height Wetting System-CHT Series

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IEST Electrolyte Wetting Measurement SystemIEST Electrolyte Wetting Testing System(EWS/ETS/CHT)

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