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Evolved gas analysis of PEFC electrolyte membrane in humidity atmosphere

TA-6003: Evolved gas analysis of PEFC electrolyte membrane in humidity atmosphere

 

In thermal analysis, the measurement condition influences the measurement results. Therefore, it is important to select the most desirable measurement condition in response to the objective of the measurement.

Conditions such as sample amount, heating rate as well as the measurement atmosphere are selected freely in thermal analysis measurement. Especially the measurement atmosphere, where it directly affects the sample's reaction, for example, measuring under atmospheric air may cause combustion or oxidation reaction and the suppression of these reactions can be confirmed by measuring under inert atmosphere. Therefore, it is essential to select the appropriate atmospheric gas suitable to the objective of the measurement.

The dehydration behavior of the sample is most affected by the effects of humidity and in some cases degradation reaction may also be affected. Hence, it is important to measure under a predetermined humidity to perform simulation on the sample's thermal behavior. Also, evaluating the material's hydroscopic behavior (percentage of water absorption) as a property is the most important factor. On the other hand, since dehydration behavior is determined from the heating process, accurately estimating the coefficient of water absorption is extremely difficult in the conventional thermal analysis.

Researchers have expended intense effort on fuel battery for energy resources of next generation. It is expected to applying the auto mobile, mobile phone and PC so on because polymer electrolyte fuel cell enables to make small size and operating temperature is lower than the other fuel battery.

We study about the thermal analysis for electrolyte membrane in humidity atmosphere. Humidity control TG-MS is performed for evolved gas of electrolyte membrane, perfluorosulfonic acid, at thermal decomposition reaction. Since coupling TG-DTA and MS, it is available to measure not only for mass change but also qualitative of evolved gas at thermal decomposition reaction. In addition, coupling with the humidity generator, HUM-1, is available to perform the evolved gas analysis in both ordinary dry and humidity atmosphere.

Evolved gas analysis products from Rigaku

In TG-FTIR, gases evolved by volatilization or thermal decomposition are qualitatively analyzed, which allows you to track changes in the generated amount along with the temperature change.