Comparison between distilled water and dimethylformamid as solvent to fabricate electrodes coated with single wall carbon nanotubes

Abstract

Aims: In this study, distilled water and dimethylformamid (DMF), an organic solvent, have been compared in different characteristics to be used as the best solvent during EPD. Materials and Methods: Electrical conductivity (EC) of both solutions was compared by dissolving electrolyte and measuring the EC. Ability of dispersion was determined after sonication in different times. Distilled water, DMF and two mixtures of them were utilized in EPD process and in deposition time of 1-5 min. The electrode weight was measured before and after the EPD and the deposit rate was estimated. Results: Among the used solvents, DMF caused a better yield (0.4 mg/cm2) at the optimum deposition time of 4 min. Though it did not have the ability of dissolving electrolyte and could not make an electrical field during EPD; it did not cause the electrode’s oxidation. Distilled water and mixtures with water resulted in electrode oxidation with no deposition. Their yield was zero or less which indicated the electrodes oxidation. Conclusion: According to the results, for having a good and stable dispersion through sonication, making an electrode with a homogeneous deposition via EPD process, preventing of electrode’s oxidation, and better temperature control DMF is recommended.