If you are using three electrode system then counter electrode is one of them. Each electrode has significant role in electrochemical measurements. The counter electrode serves as a source for electrons so that current can be passed from the external circuit through the cell.
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2. DSSC: Dye Sensitized Solar Cells https://www.gamry.com/application-notes/physechem/dssc-dye-sensitized-solar-cells/ https://www.gamry.com/application-notes/physechem/dye-solar-cells-imps-imvs/ https://www.gamry.com/assets/Uploads/USB-IMPS-IMVS-Install-2016-rev-2.pdf
3. Enhancement of pseudocapacitance performance of p-type conductive polymer in the presence of newly synthesized graphene oxide-hexamethylene tributylammonium iodide nanosheets Article Enhancement of pseudocapacitance performance of p-type condu...