How does the internal resistance of a cell vary with temperature?


in a (cheap) battery, charges get transported between the electrodes by ion movements in liquids or paste-like substances. the warmer these substances get, the easier it is for the ions to diffuse through them under the influence of a charge imbalance, and the internal resistance of the battery goes down.


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king jigg
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king jigg

Updated on October 07, 2020


  • king jigg
    king jigg about 3 years

    Does anyone have a physics explanation to why the internal resistance of a battery decreases as the temperature increases?

    • Alfred Centauri
      Alfred Centauri about 5 years
      Welcome New contributor king jigg! The community does expect that questions show some effort to research and think through the problem. Your question as written does not show any such effort. I recommend that you edit your question to show that you've done some research and thought about the problem enough to list at least one plausible reason for the variation of internal resistance with temperature. For example, that the chemical reactions within the cell are temperature dependent.
  • BioPhysicist
    BioPhysicist about 5 years
    You should probably just post an objective answer. Just because you think something is easy doesn't mean others do.
  • Admin
    Admin about 5 years
    No, the electron do not conduct the current there. In the electrolyte, the currents are ion currents. It is chemistry, not so easy.
  • Admin
    Admin about 5 years
    So it might be related to viscosity isn't it?
  • niels nielsen
    niels nielsen about 5 years
    it might (that is a testable hypothesis) but remember that the electrochemical equations themselves also contain exp(kT) terms- that is, their rates are strong functions of temperature.