Improved Electrochemical Performance of Zinc Anodes by EDTA in Near?Neutral Zinc?Air Batteries
نویسندگان
چکیده
The influence of ethylenediaminetetraacetic acid (EDTA) electrolyte additive on the performance Zn?air batteries with near-neutral chloride-based electrolytes was examined for primary and secondary batteries. electrochemical measurements indicated that Zn is not completely active in neat 2 M NaCl, but still could be discharged up to 1 mA cm?2 around ?1.0 VAg/AgCl. characterization surfaces revealed existence a passive film consisting Simonkolleite, Zn(OH)2, and/or ZnO. EDTA enhanced discharge voltages by 200 mV ?1.2 VAg/AgCl indicating an surface. effect explained its chelation abilities Zn2+ before formation hydroxide or oxide species. cells were operated 930 h specific energies 840 Wh kgZn?1. also cycled 70 cycles while providing at 1.15 V over 50 cycles. positive dependent amount free molecules. Nevertheless, showed better terms higher voltage, energies, lower overpotentials presence EDTA.
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ژورنال
عنوان ژورنال: Batteries & supercaps
سال: 2021
ISSN: ['2566-6223']
DOI: https://doi.org/10.1002/batt.202100116