I was planning to measure the conductivity of ceramic-based solid-state electrolytes using a standard EIS instrument. I have pellets prepared and will plan to coat Au or Ag onto the surface. But I found only vague descriptions in the literature about how to proceed with conductivity measurements.
Do people put the Au/electrolyte/Au assembly into a coin cell and measure EIS? (like Li/electrolyte/Li CR2032 is used all the time). Or will there be any specific connections needed to perform such a measurement?
The lack of answers offered so far could be an indication of confidence levels by solid-electrolyte researchers in their own experimental setups!
The coin cell package is full of variables and impracticalities, so I would not start with that. After asking around, the few battery researchers who would share their experience with me have admitted to using conductive glue products - not sputtering - to attach electrical contacts to their solid electrolyte. I'm about to start this myself, using a silver-containing resin purchased from a trusted supplier.
Based on my trials on variability between identical coin cells, with standard electrodes and liquid electrolyte, I'd be very wary of using them unless absolutely necessary. Since you have no risk of leakage, and usually fewer chemical safety hazards to mitigate, a setup with direct contact (such as crocodile clips on gold pins) to either side of the ceramic electrolyte will likely be more repeatable.
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