Sulfonyl Imide Acid-Functionalized Membranes via Ni (0) Catalyzed Carbon-Carbon Coupling Polymerization for Fuel Cells

Polymer membranes, having improved conductivity with enhanced thermal and chemical stability, are desirable for proton exchange membranes fuel cell application. Hence, poly(benzophenone)s membranes (SI-PBP) containing super gas-phase acidic sulfonyl imide groups have been prepared from 2,5-dichlorob...

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Bibliographic Details
Published in:Membranes (Basel) 2021-01, Vol.11 (1), p.49
Main Authors: Sutradhar, Sabuj Chandra, Yoon, Sujin, Ryu, Taewook, Jin, Lei, Zhang, Wei, Jang, Hohyoun, Kim, Whangi
Format: Article
Language:English
Subjects:
Atomic force microscopy
Benzophenone
C-C coupling
Carbon
Catalysts
Conductivity
Corrosion resistance
Coupling
Dimensional stability
Fluorides
Fourier transforms
Fuel cells
Fuel technology
Hydrocarbons
Ion exchange
Mechanical properties
Membranes
Morphology
nickel catalyst
NMR
Nuclear magnetic resonance
Polymerization
Polymers
Proton exchange membrane fuel cells
Protons
Stability analysis
sulfonyl imide
super gas-phase acidity
Thermogravimetric analysis
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Summary:Polymer membranes, having improved conductivity with enhanced thermal and chemical stability, are desirable for proton exchange membranes fuel cell application. Hence, poly(benzophenone)s membranes (SI-PBP) containing super gas-phase acidic sulfonyl imide groups have been prepared from 2,5-dichlorobenzophenone (DCBP) monomer by C-C coupling polymerization using Ni (0) catalyst. The entirely aromatic C-C coupled polymer backbones of the SI-PBP membranes provide exceptional dimensional stability with rational ion exchange capacity (IEC) from 1.85 to 2.30 mS/cm. The as-synthesized SI-PBP membranes provide enhanced proton conductivity (107.07 mS/cm) compared to Nafion 211 (104.5 mS/cm). The notable thermal and chemical stability of the SI-PBP membranes have been assessed by the thermogravimetric analysis (TGA) and Fenton's test, respectively. The well distinct surface morphology of the SI-PBP membranes has been confirmed by the atomic force microscopy (AFM). These results of SI-PBP membranes comply with all the requirements for fuel cell applications.
ISSN:2077-0375
2077-0375
DOI:10.3390/membranes11010049