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一种基于聚胺的高甲醇透电阻质子交换膜,通过超分支设计制造

Liying Ma¹, Hongxia Song¹, Xiaofei Gong²

¹School of Chemistry and Materials Science, Guizhou Normal University, 116 Baoshan North Road, Guiyang 550001, China.

|September 14, 2024

概括

新的非化硫胺聚合物与PVDF混合,为直接甲醇燃料电池 (DMFC) 创造具有高甲醇电阻的膜. 这些膜为燃料电池应用提供了有前途的性能和耐用性.

科学领域:

材料科学材料科学材料科学
电化学电化学电化学
聚合物化学聚合物化学

背景情况:

直接甲醇燃料电池 (DMFC) 需要具有高甲醇透电阻和良好的机械性能的质子交换膜.
目前的膜,如Nafion 117,在甲醇交叉和长期稳定性方面面临限制.
开发替代的非化膜对于推进DMFC技术至关重要.

研究的目的:

为了合成新的非化硫胺聚胺 (s-PAs).
为DMFC应用制造和评估s-PA/聚乙烯化物 (PVDF) 混合膜.
评估开发的膜的甲醇电阻,机械强度,热稳定性和氧化稳定性.

主要方法:

四种非化硫胺聚胺 (s-PAs) 的合成.
制备s-PA/PVDF混合膜 (50%的PVDF重量).
甲醇电阻,抗拉强度,热稳定性 (TGA) 和氧化稳定性 (芬顿试剂试验) 的表征.

主要成果:

s-PA/PVDF膜表现出显著高的甲醇电阻,BPD-111显示8.13 × 10−7 cm2/s,比Nafion 117低一个数量级.
BPD-111膜具有15MPa的抗拉强度,与Nafion 117.7相当.
这四种膜均表现出高达230°C的良好热稳定性和出色的氧化稳定性,在芬顿试剂中24小时后,它们的重量保持了93%.

结论:

合成的非化硫胺聚胺,当与PVDF混合时,形成具有优越的甲醇透电阻的膜.
在DMFC应用中,BPD-111膜显示出机械,热和化学稳定的有希望的平衡.
这些s-PA/PVDF膜为直接甲醇燃料电池的传统膜提供了可行的替代方案.

关键词:

混合膜膜的混合物直接甲醇燃料电池是一种燃料电池.甲醇电阻的电阻率是什么质子交换膜是什么

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