长寿命中性锌空电池的双改性聚丙烯酸凝胶电解质

Neutral gel electrolytes and additives were investigated to address the corrosion and safety risks of conventional zinc-air batteries with strong alkaline electrolytes on small power components of automobiles, while improving the performance and lifetime of zinc-air batteries. The neutral polyacrylic acid (PAA) gel was modified with different amounts of NaCl and nano-silica as additives, and the electrochemical and water retention tests were compared with the pure neutral polyacrylic acid gel group, and the gels of each group were put into zinc-air batteries for charge-discharge cycle tests under different working conditions. The results show that the water retention and ionic conductivity of the double-modified polyacrylic acid gel are improved, and the flexible zinc-air batteries based on them operates smoothly with a discharge life of 82 h at 0.2 mA/cm².The working life was extended by 30 hours in the small current charge-discharge test at a rate of 2 mA/cm², as compared to the control group.