| The effect of atmospheric CO2 on the cathode catalyst activity of zinc-air battery |
| کد مقاله : 1008-CNF |
| نویسندگان |
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نیلوفر احمدی *1، محمد ژیانی1، محمد محمدی تقی آبادی2 1گروه آموزشی شیمی فیزیک ، دانشکده شیمی ، دانشگاه صنعتی اصفهان ، اصفهان ، ایران 2گروه آموزشی شیمی فیزیک ، دانشکده علوم پایه ، دانشگاه تربیت مدرس ، تهران ، ایران |
| چکیده مقاله |
| Of all the electrochemical energy storage devices, air metal batteries have the potential to provide the highest energy density [1]. Among metal-air batteries, the zinc-air option is a safe, eco-friendly, inexpensive, and simple way to store and deliver electrical energy for portable and stationary devices as well as for electric vehicles [2].The acid electrolyte is not suitable for these batteries due to severe corrosion and complex thermal management. Alkaline solution based on aqueous electrolyte is used for these batteries because the reduction of oxygen at room temperature in alkaline solution has better kinetics and less overpotential [3]. One disadvantage of alkaline electrolytes is that carbonate precipitates due to the reaction of atmospheric CO2 with OH-, which reduces the conductivity of the electrolyte, and carbonate deposition on the air electrode also clogs the pores and negatively affects the performance of the air electrode and the battery [4]. In this research work, a comparative study was performed between the performance of a non-noble metal cathode electrode and a cathode electrode containing 30wt% Pt/C in an alkaline electrolyte to investigate the effect of carbonate on the cathode of a zinc-air battery. LSV curves (Figure 1) show that the increase in carbonate in the electrolyte affects the performance of both catalysts. This effect on the non-noble metal catalyst This effect on the non-noble metal catalyst is that the amount of reduction potential is reduced from -0.15 V vs. Ag/AgCl to -0.07 V vs. Ag/AgCl and the current density is reduced from 27uA.mg-1cata. to 12uA.mg-1cata. In the case of a 30wt% Pt/C catalyst, the reduction potential does not change and the current density decreases from 29uA.mg-1cata. to 26uA.mg-1cata. |
| کلیدواژه ها |
| Zinc-air battery, Cathode catalyst, Oxygen reduction reaction, Alkaline electrolyte, Carbonation |
| وضعیت: چکیده برای ارائه به صورت پوستر پذیرفته شده است |