Comparative studies of chloride and chloride/citrate based electrolytes for zinc–polyaniline batteries
| Autor: | Branimir Jugović, Jasmina Stevanović, T. Lj. Trišović, M.D. Maksimović, Branimir N. Grgur |
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| Rok vydání: | 2006 |
| Předmět: |
batteries
chloride dendrites General Chemical Engineering Inorganic chemistry Exchange current density chemistry.chemical_element 02 engineering and technology Electrolyte Zinc 010402 general chemistry Electrochemistry 01 natural sciences Chloride polyaniline chemistry.chemical_compound Aniline citrates Polyaniline medicine Tafel equation zinc 021001 nanoscience & nanotechnology 0104 chemical sciences chemistry 0210 nano-technology medicine.drug |
| Zdroj: | Electrochimica Acta |
| ISSN: | 0013-4686 |
| DOI: | 10.1016/j.electacta.2006.04.009 |
| Popis: | Electrochemical behavior of zinc and thin polyaniline (PANI) polymerized from 0.1 M HCl to 0.1 M aniline on graphite electrode, in 0.2 M ZnCl 2 and 0.50 M NH 4 Cl (chloride electrolyte) and with addition of 0.33 M Na-citrate (chloride/citrate electrolyte) were investigated. In the chloride/citrate comparing with chloride containing electrolyte zinc electrode shows negative shift of the open circuit potential of ∼130 mV, decreases of exchange current density for more than order of magnitude and increase of cathodic Tafel slope, due to the zinc ions complexation. In citrate/chloride electrolyte zinc dendrite formation were suppressed. In the range of investigated charge/discharge current densities of 0.25–1 mA cm −2 , initially obtained specific capacity was in the range of 140–85 mAh g −1 , respectively. In cycling regime specific capacity and columbic efficiency were affected with anodic potential limits. For anodic potential limits of 0.32 V (SCE) citrate/chloride electrolyte shows better characteristic than chloride electrolyte, due to the influence of citrate ions on negative shift of doping reaction. Increasing anodic potential limit to 0.5 V (SCE), leads to faster decrease of specific capacity in citrate/chloride than in chloride electrolyte, which was. explained by higher hydrophilic effect of citrate anions. |
| Databáze: | OpenAIRE |
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