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A highly proton conductive perfluorinated covalent triazine framework via low-temperature synthesis

Journal Article · · Nature Communications
 [1];  [2];  [1];  [1];  [1];  [3];  [4];  [5];  [1]
  1. Xi’an Jiaotong University, Shaanxi (China)
  2. Northwest University, Xi’an, Shaanxi (China)
  3. Huazhong Agricultural University, Wuhan (China)
  4. Chinese Academy of Sciences, Lanzhou (China)
  5. Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
Proton-conducting materials are essential to the emerging hydrogen economy. Covalent triazine frameworks (CTFs) are promising proton-conducting materials at high temperatures but need more effective sites to strengthen interaction for proton carriers. However, their construction and design in a concise condition are still challenges. Herein, we show a low temperature approach to synthesize CTFs via a direct cyclotrimerization of aromatic aldehyde using ammonium iodide as facile nitrogen source. Among the CTFs, the perfluorinated CTF (CTF-TF) was successfully synthesized with much lower temperature ( ≤ 160 °C) and open-air atmosphere. Due to the additional hydrogen-bonding interaction between fluorine atoms and proton carriers (H3PO4), the CTF-TF achieves a proton conductivity of 1.82 × 10-1 S cm-1 at 150 °C after H3PO4 loading. Moreover, the CTF-TF can be readily integrated into mixed matrix membranes, displaying high proton conduction abilities and good mechanical strength. This work provides an alternative strategy for rational design of proton conducting media.
Research Organization:
Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES). Chemical Sciences, Geosciences & Biosciences Division (CSGB); National Natural Science Foundation of China; Key Project of Natural Science Basic Research Program of Shaanxi; Qin Chuangyuan cited high level innovation and entrepreneurship talent project
Grant/Contract Number:
AC05-00OR22725
OSTI ID:
2471476
Journal Information:
Nature Communications, Journal Name: Nature Communications Journal Issue: 1 Vol. 14; ISSN 2041-1723
Publisher:
Nature Publishing GroupCopyright Statement
Country of Publication:
United States
Language:
English

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