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Doped double spirocyclic cationic POSS for nanocomposite anion exchange membranes with high conductivity and robustness

Author

Listed:
  • Li, Na
  • Ni, Hongzhe
  • Zhao, Jialin
  • Feng, Kuirong
  • Wu, Jingyi
  • Lei, Yijia
  • Gao, Jian
  • Wang, Yan
  • Yu, Junjian
  • Yang, Jiayao
  • Sun, Shiyao
  • Li, Zhen
  • Wang, Zhe

Abstract

Organic-inorganic hybridization methods are receiving increasing attention as a method that can improve the performance of anion exchange membranes (AEMs) in a simpler and more effective way. Here, by selecting polyhedral oligomeric silsesquioxane (POSS) with good mechanical and thermal properties as inorganic fillers. Successful introduction of N-spirocyclic cations with bifunctional groups onto POSS yielded MDSU-poss. subsequently, we doped them into qPTP-IC-O-9% membranes as fillers in different ratios to obtain a series of composite membranes. High-density cations introduced by POSS with simultaneous organic-inorganic frameworks effectively inhibit membrane over-swelling. As a result, the membrane is able to achieve high ionic conductivity with the assurance of reasonable dimensional stability. At 80 °C, the 15 % MDSU-poss/qPTP-IC-O membrane achieved the ionic conductivity of 168.6 mS cm−1 at low SR with the peak power density of 431 mW cm−2. In addition, the mechanical properties of the composite membranes were all greatly improved due to the organic cations attached to the POSS with good affinity, contributing to the tensile strength of the 15 % MDSU-poss/qPTP-IC-O membrane of 57.4 MPa. The membrane was finally immersed in 3 M NaOH solution for 1032 h and still maintained 89.3 % of the starting ionic conductivity.

Suggested Citation

  • Li, Na & Ni, Hongzhe & Zhao, Jialin & Feng, Kuirong & Wu, Jingyi & Lei, Yijia & Gao, Jian & Wang, Yan & Yu, Junjian & Yang, Jiayao & Sun, Shiyao & Li, Zhen & Wang, Zhe, 2024. "Doped double spirocyclic cationic POSS for nanocomposite anion exchange membranes with high conductivity and robustness," Renewable Energy, Elsevier, vol. 237(PA).
  • Handle: RePEc:eee:renene:v:237:y:2024:i:pa:s0960148124016409
    DOI: 10.1016/j.renene.2024.121572
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    References listed on IDEAS

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    1. Junhua Wang & Yun Zhao & Brian P. Setzler & Santiago Rojas-Carbonell & Chaya Ben Yehuda & Alina Amel & Miles Page & Lan Wang & Keda Hu & Lin Shi & Shimshon Gottesfeld & Bingjun Xu & Yushan Yan, 2019. "Poly(aryl piperidinium) membranes and ionomers for hydroxide exchange membrane fuel cells," Nature Energy, Nature, vol. 4(5), pages 392-398, May.
    2. Xu, Shicheng & Wu, Wanlong & Wan, Ruiying & Wei, Wei & Li, Yujiao & Wang, Jin & Sun, Xiaoqi & He, Ronghuan, 2022. "Tailoring the molecular structure of pyridine-based polymers for enhancing performance of anion exchange electrolyte membranes," Renewable Energy, Elsevier, vol. 194(C), pages 366-377.
    3. Schropp, Elke & Campos-Carriedo, Felipe & Iribarren, Diego & Naumann, Gabriel & Bernäcker, Christian & Gaderer, Matthias & Dufour, Javier, 2024. "Environmental and material criticality assessment of hydrogen production via anion exchange membrane electrolysis," Applied Energy, Elsevier, vol. 356(C).
    4. López-Fernández, E. & Gómez-Sacedón, C. & Gil-Rostra, J. & Espinós, J.P. & Brey, J. Javier & González-Elipe, A.R. & de Lucas-Consuegra, A. & Yubero, F., 2022. "Optimization of anion exchange membrane water electrolyzers using ionomer-free electrodes," Renewable Energy, Elsevier, vol. 197(C), pages 1183-1191.
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