posted on 2024-02-08, 22:32authored byWei Zheng, Yan Zhao, Hui Zhang, Lixue Zhang, Zhongyi Zhang
The solid-state zinc-air batteries have attracted extensive
attention
due to their high theoretical energy density, high safety, and the
compact structure. In this work, a novel hydrogel solid-state electrolyte
was developed that was equipped with an interpenetrating network of
zinc polyacrylate (PAZn) and polyacrylamide (PAM). At the same time,
a cyclodextrin derivative with sulfonate groups was introduced as
an additive. From the design of anionic groups in the network, effective
and stable channels for zinc species have been established. The unique
structure of the additives regulates the uniform deposition of zinc.
After using this solid-state electrolyte, the cycle lifetime of solid-state
zinc-air batteries assembled have been significantly extended. The
byproducts were greatly suppressed and generated the smooth zinc electrode
surface after the charge–discharge cycling.