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  • 1
    Electronic Resource
    Electronic Resource
    Springer
    Electrical engineering 51 (1966), S. 123-130 
    ISSN: 1432-0487
    Source: Springer Online Journal Archives 1860-2000
    Topics: Electrical Engineering, Measurement and Control Technology
    Description / Table of Contents: Summary By means of metallic probes, the local distribution of the internal resistance in galvanic cells is measured. The theoretical base of the new method is derived from the theory of current distribution. As exemple, measurements on dry cells (IEC: R20) are reported. Between carbon rod and manganese core, between core and electrolyte and on the zinc are border-resistances located. These resistances are measured quantitatively the first time. During discharge and during drying out, the border resistances are much more influenced than the resistance e.g. of the black mix. The electronic conductivity of porous electrodes can be measured separated from the ionic parts by application of the new method.
    Notes: Übersicht Mit Hilfe einer Sondenmethode wird die örtliche Verteilung des Leitungswiderstandes in galvanischen Zellen ermittelt. Die Grundlagen für die Sondenmethode werden aus der Theorie der Stromverteilung abgeleitet. An Trockenzellen (IEC: R20) werden Messungen durchgeführt und die Ergebnisse mitgeteilt. Am Stift, am Außenrand der Puppe und am Zink treten Grenzflächenwiderstände auf, die hier zum ersten Mal quantitativ gemessen werden. Die Entladung, ebenso wie das Austrocknen der Zellen, wirken besonders stark auf die Grenzflächenwiderstände. Die neue Methode erlaubt die getrennte Messung des Elektronenanteils der Leitfähigkeit in der porösen positiven Elektrode.
    Type of Medium: Electronic Resource
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