Battery Test Cell

Description

Principle of Operation

The Battery Test Cell is a reusable electrochemical test platform designed for in-situ and operando analysis of rechargeable battery materials. It replicates the working environment of a coin or pouch cell while providing a controlled, measurable configuration for studying electrode and electrolyte interfaces. By integrating precision mechanical sealing and electrical isolation, the cell enables quantitative electrochemical testing such as charge–discharge cycling, impedance spectroscopy, and open-circuit potential monitoring.

The core principle lies in creating a sandwiched electrode–separator–electrolyte assembly between a current collector pair under uniform pressure. When connected to a potentiostat or battery cycler, the electrochemical reactions occurring inside the test cell are monitored to understand ion transport, electrode kinetics, and degradation mechanisms.

Key Features & Specifications

• Construction: High-purity stainless-steel body for mechanical stability and corrosion resistance.
• Insulation: PEEK or PTFE insulation prevents short-circuits and chemical interactions with electrolytes.
• Sealing System: Airtight O-ring configuration prevents electrolyte leakage and moisture intrusion.
• Maximum cell dimensions: Ø58 mm (max diameter) × 49 mm (height)
• Electrode Compatibility: Supports round electrode discs up to φ16 mm (custom sizes optional).
• Reference electrode: lithium wire, length ≥ 10 mm
• Ease of Assembly: Reusable screw-type closure design with uniform compression for reproducible results.
• Pressure Control: Spring-loaded assembly ensures consistent contact pressure across the electrode surface.

Compatibility

 

• Suitable for AC impedance (EIS) and battery charge–discharge studies
• Applicable to supercapacitor and gel-electrolyte experiments (configuration dependent)
• Integrates with potentiostats/galvanostats for advanced diagnostics, and battery cyclers for long-term cycling

 

Typical Applications

• Evaluation of new cathode and anode materials (e.g., Li-ion, Na-ion, Mg-ion systems).
• Electrolyte formulation and SEI (solid-electrolyte interface) characterisation.
• Cycle-life testing and degradation mechanism analysis.
• Solid-state battery research and ionic conductivity measurements.
• Academic and industrial R&D for energy-storage materials and interfaces.