A version of the three-electrode (lithium reference) titanium battery test cell developed for gas-pressure measurement. A valved gas line and a pressure gauge are added to the cell, so the internal gas pressure can be monitored and set during charge/discharge. Side reactions such as electrolyte decomposition and SEI/CEI formation generate gas; tracking cell pressure over cycling shows when, and at which voltage, gas formation starts. With the reference electrode, gas evolution can be correlated separately with the anode and cathode potentials.

The body is high-purity titanium; the inner insulator is PEEK and the terminals are gold-plated copper. Chemically resistant O-rings and a screw-down lid keep the cell gas-tight, so it can be assembled in a glovebox and then tested outside. After testing, the cell is easily disassembled and cleaned without damaging the sample, so electrodes can be recovered for post-mortem analysis. The separator is supplied by the user.

Key Features

Pressure gauge and valved gas line
Three-electrode measurement with a lithium reference
Maximum pressure 0.6 MPa (manufacturer data; custom versions on request)
Spring-loaded stack pressure, O-ring sealing
Assemble in a glovebox, test outside

Technical Specifications

Electrode system	Three-electrode
Reference electrode	Lithium
Maximum pressure	0.6 MPa (manufacturer data)
Body material	High-purity titanium
Inner insulator	PEEK
Terminals	Gold-plated copper
Sample diameter	20 mm