Journal Article

FZJ-2018-02635

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png A New Setup for the Quantitive Analysis of Drying by the Use of Gas-phase FTIR-Spectroscopy

Scheepers, F. (Corresponding author)FZJ* ; Burdzik, A.FZJ* ; Stähler, M.FZJ* ; Carmo, M.FZJ* ; Lehnert, W.FZJ*RWTH* ; Stolten, D.FZJ*RWTH*

2018
American Institute of Physics [S.l.]

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Please use a persistent id in citations: http://hdl.handle.net/2128/19860  doi:10.1063/1.5036817

Abstract: Drying rates are important for the manufacture of thin films and in specific for the production of electrodes used in electrochemical devices such as fuel cells and electrolyzers. The known procedures to investigate time-dependent sample compositions and selective evaporation rates are insufficient to obtain mean information about the full area instead of a single point analysis. Therefore, a new setup is presented using gas-phase Fourier-transform infrared spectroscopy. This method analyzes the gas-phase composition to recalculate the layer composition in electrode fabrication at any time during drying. According to the golden rule of measurement technology, manufacturer specifications are often overestimated. Therefore, our alternative procedures were used to evaluate the precision of devices used. The calculated measurement precision is confirmed by validation. The expected deviation is quantified to be less than 2% for the common application. Further on, the relative test-retest standard deviation is determined to be 0.3%–0.4%. As a result of the error propagation, the measurement precision is limited by the background gas flow rate precision for common application. At low volume fractions, the influence of the substance flow rate deviations becomes significant. However, further studies will focus on increasing the gas flow rate precision

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Contributing Institute(s):

1. Elektrochemische Verfahrenstechnik (IEK-3)

Research Program(s):

1. 135 - Fuel Cells (POF3-135) (POF3-135)

Appears in the scientific report 2018

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Database coverage:
; ; Current Contents - Engineering, Computing and Technology ; Current Contents - Physical, Chemical and Earth Sciences ; Ebsco Academic Search ; IF < 5 ; JCR ; Nationallizenz ; SCOPUS ; Science Citation Index ; Science Citation Index Expanded ; Thomson Reuters Master Journal List ; Web of Science Core Collection

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