Side chain piperidine cation grafting type polybiphenyl alkaline membrane and preparation method thereof
A polybiphenyl alkaline and cationic technology, used in electrochemical generators, fuel cells, electrical components, etc., to achieve the effects of excellent thermal stability and high ionic conductivity
Pending Publication Date: 2022-05-24
BEIJING UNIV OF CHEM TECH
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The invention discloses a side chain piperidine cation grafting type polybiphenyl alkaline membrane and a preparation method thereof, and belongs to the technical field of fuel cell anion exchange membrane preparation. The preparation method comprises the following steps: (1) preparing a polybiphenyl skeleton; (2) preparing side chain piperidine cations; and (3) preparing the side chain piperidine cation grafting type polybiphenyl alkaline membrane. The side chain piperidine cation grafting type polybiphenyl alkaline membrane has high ionic conductivity and chemical stability, the hydroxyl ion conductivity can reach 117.1 mS/cm at the temperature of 80 DEG C, the ionic conductivity is only reduced by less than 13.6% after the side chain piperidine cation grafting type polybiphenyl alkaline membrane is soaked in a 2M NaOH solution for 1500 h at the temperature of 80 DEG C, and the side chain piperidine cation grafting type polybiphenyl alkaline membrane shows good chemical stability. In addition, the method provided by the invention has the characteristics of simple preparation process and low cost, and has wide application prospects in alkaline membrane fuel cells.
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Property | Measurement | Unit |
Resonance frequency | 400.0 | mHz |
Conductivity | 74.5 ~ 117.1 | ms/cm |
Conductivity | 117.1 | ms/cm |
tensile | MPa | |
Particle size | Pa | |
strength | 10 |
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