PAT-Cell-Gas

PAT-Cell-Gas

PAT-Cell for in-situ gas analysis in a flow-through set-up

Working modes

There are two dedicated lower plunger available for the PAT-Cell-Gas for different testing purposes.

Mode 1: Air mode

The lower plunger with perforated plate allows for electrochemical characterization of gas diffusion electrodes used for instance in Li-air batteries. The lower electrode is contacted by and “breathes” through the perforated stainless steel current collector supporting it. During operation, the pressure gradient building up between cell headroom and the gas volume below the perforated plate effectively prevents back-mixing. The relatively large volume below the perforated is at the expense of time resolution, but makes this solution robust against clogging of the gas path.

PAT-Core configuration example

Mode 1: OEMS mode

The PAT-Core setup using a lower plunger with flow field provides almost perfect plug-flow of the purge gas being essential for quantitative time-resolved analysis. Gases evolved or consumed at the working electrode may be analysed through the composition change of the gas stream that is to be passed along the spiral-type flow field below the working electrode. The composition of the outgoing gas can be analyzed by e.g. mass spectrometry. The pressure gradient between cell headroom and spiral-type flow field effectively prevents back-mixing. This and the tiny gas volume of the flow field ensure best possible time resolution.

PAT-Core configuration example

Accessories

Quick Connect Set 1/16 inch (GAS)

ECC1-01-0080-A

In test mode, the cell must be connected outside the glovebox with the carrier gas supply and a gas meter. This quick connect set with self-locking couplings is suitable for this purpose.The set includes two self locking couplings (Swagelok®) with 500 mm stainless steel tubes 1/16 inch x 0.02 inch. Compatible with 1/16 inch Swagelok® Tube Fitting.

Our versatile test cell for in-situ gas analysis

The PAT-Cell-Gas is a test cell dedicated for in-situ gas analysis of battery materials in a flow-through set-up. For that purpose, the test cell features a gas inlet and outlet and optionally a built-in pressure sensor and a valve port for gas sample removal with a syringe.

The cell stack is placed on top of a perforated or grooved current collector (flow field), which is to be purged with a gentle stream of gas. The lower electrode must be gas permeable, so as to allow for gas exchange with the feed gas. Typically, the cell is used with gas diffusion electrodes (such as for Li-air) or with Li-ion battery electrodes with a meshed current collector. The special design minimizes backmixing of the gas from the flowfield back into the headspace, and is thus very suitable for time-resolved gas analysis with a mass spectrometer, for example.

PAT-Cell-Gas overview

Features

PAT series test cell with gas inlet and outlet

PAT-Core design with or without ring-shaped reference electrode

Lower plungers with perforated plate and with spiral-shaped flow field for optimized plug-flow available.

Optional laser-welded pressure sensor, 0 to 3 bar abs.

Optional gas sample port

Electrode feedthroughs with glass-to-metal seals

Optimized lid for use with metal seal

Helium leak tested for high tightness

Specifications

Length 86.5 mm
Width 68 mm
Height 73 mm
Weight 0.6 kg
Gas connection 1/16 inch Swagelok Tube Fitting
Electrode diameter 18 mm
Temperature resistance -20 to 70° C

Variants

PAT-Cell-Gas

  • PAT-Cell with gas inlet and outlet
  • Optimized lid for use with metal seal
  • Electrode feedthroughs with glass-to-metal seals

 

PAT-Cell-Gas P

  • PAT-Cell with gas inlet and outlet
  • Laser-welded pressure sensor, 0 to 3 bar abs.
  • Optimized lid for use with metal seal
  • Electrode feedthroughs with glass-to-metal seals

 

PAT-Cell-Gas S

  • PAT-Cell with gas inlet and outlet
  • Gas sample port
  • Optimized lid for use with metal seal
  • Electrode feedthroughs with glass-to-metal seals

 

PAT-Cell-Gas SP

  • PAT-Cell with gas inlet and outlet
  • Laser-welded pressure sensor, 0 to 3 bar abs.
  • Gas sample port
  • Optimized lid for use with metal seal
  • Electrode feedthroughs with glass-to-metal seals

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The PAT-Cell-Press is the ideal, leakproof cell for pressure testing.

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ECC-Air

Test cell for characterization of gas diffusion electrodes in aprotic electrolytes

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ECC-DEMS

Test cell for time-resolved gas analysis. For Li-air and conventional Li-ion chemistries.

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