Three neutral gel electrolytes,PVA-NH4Cl-ZnCl2,PVA-NH4Cl-KI and PVA-NH4Cl-KCl,as well as an alkaline gel electrolyte,PVA-KOH,were prepared using polyvinyl alcohol (PVA) as the polymer matrix,NH4Cl as the main component of electrolyte,and ZnCl2,KI,KCl and KOH as additives.The Fourier infrared spectra,electrochemical properties,water retention and tensile properties of the neutral and alkaline gel electrolytes were analyzed.The results showed that the self-discharge performance,discharge duration,specific capacity and cycle time of the neutral gel electrolytes and their assembled zinc air batteries were better than those of the alkaline gel electrolyte and its assembled battery.The neutral gel electrolyte PVA-NH4Cl-KCl and its assembled battery had the best performance,with a tensile strength of 101.40kPa and an elongation of 196.43%.The specific capacity of the assembled zinc-air battery was 793.40mAh/g,and the maximum power density was 1.38mW/cm2.
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