Zhang Pengfei, Wang Keliang, Zuo Yayu, Wei Manhui, Wang Hengwei, Chen Zhuo, Shang Nuo, Pei Pucheng
School of Mechanical Engineering, Beijing Institute of Technology, Beijing 100081, China.
State Key Lab. of Automotive Safety and Energy, Tsinghua University, Beijing 100084, China.
ACS Appl Mater Interfaces. 2022 Nov 2;14(43):49109-49118. doi: 10.1021/acsami.2c13625. Epub 2022 Oct 22.
Zinc-air batteries using gels as carriers for electrolyte absorption have attracted extensive attention due to their flexibility, deformability, and high specific capacity. However, traditional mono-polymer gel electrolytes display poor mechanical properties and low ionic conductivity at wide-window temperatures. Here, the enhanced gel polymer (PAM-F/G) modified by dual surfactants is present by way of pluronic F127 and layered graphene oxide introduced into the polyacrylamide (PAM) matrix. The gel electrolyte procured by absorbing 6 M KOH exhibits improved mechanical characteristics, temperature adaptability, and a satisfactory ionic conductivity (276 mS cm). The results demonstrate that a flexible zinc-air battery assembled by PAM-F/G electrolyte outputs a high power density (155 mW cm) and can even operate reliably (>40 h) at -20 °C. These findings are available for promoting the research and popularization of flexible zinc-air batteries with high performance.
以凝胶作为电解质吸收载体的锌空气电池，因其柔韧性、可变形性和高比容量而受到广泛关注。然而，传统的单聚合物凝胶电解质在宽窗口温度下表现出较差的机械性能和低离子电导率。在此，通过将普朗尼克F127和层状氧化石墨烯引入聚丙烯酰胺（PAM）基质的方式，呈现了由双表面活性剂改性的增强型凝胶聚合物（PAM-F/G）。通过吸收6 M KOH获得的凝胶电解质表现出改善的机械特性、温度适应性以及令人满意的离子电导率（276 mS cm）。结果表明，由PAM-F/G电解质组装的柔性锌空气电池输出高功率密度（155 mW cm），甚至在-20°C下也能可靠运行（>40小时）。这些发现有助于推动高性能柔性锌空气电池的研究与推广。
