After applying electrodes to my polymer-based solid-state electrolyte films, I check the connectivity using a digital multimeter to ensure there is no short circuit. I observe three different behaviors:
- Beep sound: Indicates a short circuit.
- Numerical value (resistance): Unclear if this is ideal.
- No reading at all: No number or beep, only blank.
While I understand the beep means the sample is shorted and not usable, I am unsure how to interpret the other two cases. Does a numerical resistance reading indicate proper connectivity? Does no reading suggest poor contact or an open circuit? What should be considered a healthy or acceptable response for solid-state battery assembly?
Hi Anila, not sure if you're still looking for an answer to this question but I can probably help.
First, I'm assuming that you've coated both sides of a cylinder-shaped solid electrolyte with your electrodes, and that you've connected the two cables from your multimeter to the two electrodes. The connection between the electrodes and the multimeter cables is the tricky bit; make sure they are electrically and mechanically solid.
Next, I'm assuming you're using the multimeter as an ohmmeter with a range up to megaohms. Then ionic conductivity of your electrolyte won't necessarily translate directly into electronic conductivity, so a resistance measurement is a combination of a "leakage" current and some possible electrochemical reactions. A better way to measure what's happening between the electrodes would be an impedance test.
Third, if you're getting no reading, I assume this means the multimeter is displaying there is an open circuit. That could be a good thing - no leakage current between electrodes - but it also could mean the setup is compromised, like the electrodes aren't well connected to the multimeter. This can also be resolved by using an impedance measurement instead of a resistance measurement.
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