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Journal of Applied Electrochemistry

, Volume 9, Issue 5, pp 581–585 | Cite as

Impedance parameters and the state-of-charge. III. Zinc-manganese dioxide and magnesium-manganese dioxide dry batteries

  • M. L. Gopikanth
  • S. Sathyanarayana
Article

Abstract

The problem of non-destructive determination of the state-of-charge of zinc- and magnesium-manganese dioxide dry batteries is examined experimentally from the viewpoint of internal impedance and open-circuit voltage at equilibrium. It is shown that the impedance is mainly charge-transfer controlled at relatively high states-of-charge and progressively changes over to diffusion control as the state-of-charge decreases in the case of zinc-manganese dioxide dry batteries. On the other hand, the impedance is mainly diffusion controlled for undischarged batteries but becomes charge-transfer controlled as soon as there is some discharge in the case of magnesium-manganese dioxide batteries. It is concluded that the determination of state-of-charge is not possible for both types of batteries by the measurement of impedance parameters due to film-induced fluctuations of these parameters. The measurement of open-circuit voltage at equilibrium can be used as a state-of-charge indicator for Zn-MnO2 batteries but not for Mg-MnO2 batteries.

Keywords

Zinc Physical Chemistry Dioxide Impedance Parameter Internal Impedance 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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References

  1. [1]
    S. Sathyanrayana, S. Venugopalan and M. L. Gopikanth,J. Appl. Electrochem. 9 (1979) 125.Google Scholar
  2. [2]
    M. L. Gopikanth and S. Sathyanarayana,ibid 9 (1979) 369.Google Scholar

Copyright information

© Chapman and Hall Ltd 1979

Authors and Affiliations

  • M. L. Gopikanth
    • 1
  • S. Sathyanarayana
    • 1
  1. 1.Department of Inorganic and Physical ChemistryIndian Institute of ScienceBangaloreIndia

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