Affiliation:
1. Institute of New Energy on Chemical Storage and Power Sources School of Chemical and Environmental Engineering Yancheng Teachers University Yancheng Jiangsu 224000 China
2. Shaanxi Key Laboratory of Chemical Additives for Industry College of Chemistry and Chemical Engineering Shaanxi University of Science and Technology Xi'an 710021 China
3. Department of Chemical Engineering and Waterloo Institute for Nanotechnology University of Waterloo Waterloo Ontario N2 L3G1 Canada
Abstract
AbstractZinc corrosion and dendrite formation are the main issues which impede the performance of aqueous zinc ion batteries (ZIBs) after certain times. In this work, we systematically investigated the effects of three different valence ions (e. g., Na+, Mg2+, Al3+) as electrolyte additives on the suppression of zinc corrosion and the inhibition of dendrite growth. By combining experiments and theoretical calculations, it has been found that the existence of Na+ ions effectively suppressing the zinc dendrite growth because Na+ possessess high adsorption energy approximately −0.39 eV. Moreover, Na+ ions could lengthen the zinc dendrite formation duration up to 500 h. On the other hand, the PANI/ZMO cathode materials showed the small band gap approximately 0.097 eV, signifying that the PANI/ZMO possessed the semiconductor characteristics. Furthermore, an assembled Zn//PANI/ZMO/GNP full battery using Na+ ions as electrolyte additive displayed capacity retention of 90.2 % after 500 cycles at 0.2 A g−1, whereas the capacity retention of the control battery using pure ZnSO4 electrolyte was only 58.2 %. This work could provide a reference for the selection of electrolyte additives in future batteries.
Funder
Natural Science Foundation of Jiangsu Province