posted on 2024-01-11, 19:06authored byYan Wang, Song Wang, Zhiyan Sui, Yiman Gu, Yanchao Zhang, Jian Gao, Yijia Lei, Jialin Zhao, Na Li, JingYi Wu, Zhe Wang
N-Spirocyclic cations have excellent
alkali resistance
stability, and precise design of the structure of N-spirocyclic anion-exchange membranes (AEMs) improves their comprehensive
performance. Here, we design and synthesize high-performance poly(triphenylene
piperidine) membranes based on the “fishbone” design
of amino/N-spirocyclic cations. The “fishbone”
design does not disrupt the overall stabilized conformation but promotes
a microphase separation structure, while exerting the synergistic
effect of piperidine cations and spirocyclic cations, resulting in
a membrane with good conductivity and alkali resistance stability.
The hydroxide conductivity of the QPTPip-ASU-X membrane reached up
to 133.5 mS cm–1 at 80 °C. The QPTPip-ASU-15
membrane was immersed in a 2 M NaOH solution at 80 °C for 1200
h, and the conductivity was maintained at 91.02%. In addition, the
QPTPip-ASU-5 membrane had the highest peak power density of 255 mW
cm–2.