Aqueous Compatible Dual Conductivity Test Cell with both in-plane and through-plane cartridges

Aqueous Compatible Dual Conductivity Test Cell with both in-plane and through-plane cartridges

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Introduction

The Dual Conductivity Test Cell is a versatile, precision-engineered solution for comprehensive conductivity analysis in electrochemical materials. Building on the proven reliability of the standard redox.me Battery Test Cell, this system includes two interchangeable cartridges to provide dual measurement capabilities in a single platform:
a) in-plane conductivity cartridge designed for accurate measurement of lateral conductivity across your sample, ideal for characterizing thin films, membranes, and layered materials. Best for materials where lateral (surface) conduction dominates.
b) through-plane conductivity cartridge optimized for evaluating vertical conductivity, enabling insights into ion transport across the material thickness, which is critical in real device operation (like in batteries or fuel cells).

This modular design allows researchers to seamlessly switch between measurement modes without changing the base cell, ensuring consistent conditions and reproducible results.

Key Features 

1. Dual Conductivity Measurement Capability

• Measures total conductivity, including both electronic and ionic contributions
• Suitable for a wide range of material types

2. Versatile Material Compatibility

• Supports electronic conductors such as:
  • Graphite
  • Graphene
  • Conductive polymers
  • Metal electrodes
• Supports ionic conductors such as:
  • Polymer electrolytes
  • Ion-exchange membranes

3. Flexible Measurement Configurations

• Measurement outcome depends on setup and material properties
• Enables tailored testing for specific conductivity mechanisms

4. Ionic Conductivity Support with Conditioning

• Allows ion transport measurements under:
  • Hydrated conditions
  • Liquid electrolyte environments
• Compatible with membrane humidification and electrolyte conditioning

5. Advanced Conductivity Separation Options

• Total conductivity can be deconvoluted using:
  • Blocking (ion-locking) electrodes
  • Electrochemical impedance spectroscopy (EIS) with equivalent circuit modeling

6. Chemically Inert and Robust Construction

• Built from stainless steel and PEEK for chemical resistance
• FFKM O-rings ensure compatibility with demanding environments

7. High-Quality Electrical Contact

• Gold-plated pins provide reliable, low-resistance electrical contact

8. Gas-Tight and Glovebox-Compatible Design

• Fully sealed construction prevents contamination
• Easy assembly inside a glove box
• Minimizes user error and exposure to air-sensitive materials

Application

The Dual Conductivity Test Cell is perfect for labs focused on battery materials, membranes, electrodes, and other electrochemical systems, offering both flexibility and high-precision performance. The measured material must be mechanically stable enough to fit into the cartridges and make good contact with the electrodes (liquids or very soft gels are generally not suitable unless confined in a solid matrix). With this setup, you can measure solid or semi-solid electrochemical materials where both in-plane and through-plane conductivity are relevant. Specifically:
a) membranes

• ion-exchange membranes (e.g., PEMs, AEMs),
• polymer electrolytes,
• separator films in batteries,

b) electrodes and films

• battery electrodes (cathode or anode composites),
• thin conductive coatings,
• graphene, carbon nanotube films, or conductive polymer layers,

c) layered or composite materials

• multilayered polymer/electrode assemblies
• laminated battery materials
• electrode-membrane interfaces

d) powder pellets or pressed materials

• compressed powders of ionic or electronic conductors
• ceramic or solid-state electrolyte pellets

The graph below shows the relation between the pressure applied to the sample and the distance travelled from the point of contact.

To calculate the point of contact, subtract the sample thickness from 4 mm. For example, for the 0.9 mm sample, the point of contact (i.e. reading on micrometer screw) will be 4 mm – 0.9 mm = 3.1 mm. Therefore, you should set the micrometer screw to 3.1 mm and measure the distance/pressure relation from this point.

The procedure for conducting the measurements with a similar setup and the method for calculating in-plane conductivity are included in this measurement protocol.

General Specifications

In-Plane Conductivity Cartridge

Through-Plane Conductivity Cartridge