【摘要】 合成了石墨相碳氮纳米片（g-C₃N₄）,并将其与Nafion树脂共混制备了复合膜,发现在膜中加入适量的g-C₃N₄对提高膜的电导率有显著效果,当膜中g-C₃N₄含量为Nafion树脂质量的0.25%时,膜在30℃下的电导率从0.074 3S/cm上升到0.110 6 S/cm,这主要是由于纳米片上的碱性基团与树脂上的磺酸根形成了酸碱对,加快了质子传输。将商业化Nafion 211膜与复合膜分别组装成单电池进行性能测试,结果表明,使用复合膜组装成的单电池的最大功率较Nafion 211膜组装成的单电池提高了16.9%,且通过交流阻抗测试（EIS）发现复合膜的电阻明显小于Nafion 211膜,进一步证实了g-C3N4改性Nafion膜的有效性与可行性。更多还原

【Abstract】 A series of composite membranes containing deferent g-C₃N₄ content were fabricated by incorporating g-C₃ N₄ nanosheets into Nafion resins.It’s found that adding proper amount of g-C₃ N₄ into membranes has significant effect on increasing the conductivity of membranes.The conductivity of the composite membrane increases from0.074 3 to 0.110 6 S/cm when the g-C₃N₄ nanosheet content is 0.25% of the Nafion resin at 30 ℃,because the acid-base pair interactions between the alkaline groups on the nanosheets and the sulfonic acid groups of the resins facilitates the proton transport.The single cell tests indicate that the maximum power of the cell assembled by the composite membrane is 16.9% higher than the cell assembled by the Nafion 211,and the composite membrane show better polarization performance and lower resistance than Nafion 211,further verifying the validity and feasibility of g-C₃ N₄ modified Nafion resins.更多还原