本文選題：質(zhì)子交換膜燃料電池　切入點：質(zhì)子交換膜　出處：《長春工業(yè)大學》2017年碩士論文

【摘要】：質(zhì)子交換膜燃料電池(PEMFC)作為一種新型產(chǎn)能材料,具有燃料利用率高,可以同時提供動能和熱能,以及方便運輸和環(huán)境友好等特點。作為該電池的核心部件,質(zhì)子交換膜(PEM)不但能隔絕甲醇和氧化劑以確保燃料電池的正常使用,而且可以作為質(zhì)子的有效傳輸載體,使得質(zhì)子可以在燃料電池中有效的進行傳輸,保證燃料電池可以正常、穩(wěn)定、高效的工作。當前已經(jīng)商品化的Nafion系列質(zhì)子交換膜在質(zhì)子傳導率方面具有較好的表現(xiàn),不過在高溫操作環(huán)境下,燃料(甲醇)透過率過高,質(zhì)子傳導率下降過快是該型質(zhì)子交換膜的主要問題。本文針對這兩種問題制備了兩種聚合物膜,從兩個方面對這些問題進行改善。通過溶液共混法制備氨基磺化聚芳醚酮砜(Am-SPAEKS)和聚乙烯醇(PVA)的雜化膜。改變PVA的組分含量,制成不同配比的Am-SPAEKS/PVA復合膜,通過FT-IR測試證明了復合膜的成功制備,同時對復合膜的其他性能也進行了比較全面的測試。在復合膜中,氨基與磺酸基團的氫鍵作用以及羥基與磺酸基團間的酸堿離子對作用保證了復合膜的穩(wěn)定性。與純Am-SPAEKS質(zhì)子交換膜相比較來說,其阻醇性能有明顯的提高,在25℃時,Am-SPAEKS/PVA50%的甲醇滲透率數(shù)值僅為2.95×10-7cm2 s-1,而在60℃時,其甲醇滲透率為8.26×10-7 cm2 s-1。另外,我們制備了新型雙氨基雙酚單體(2,4-二氨基苯基對苯二酚(2Am-PHQ)),并且通過縮聚反應,控制氨基雙酚單體與雙酚A的比例,合成不同配比的新型雙氨基磺化聚芳醚酮砜聚合物(2Am-SPAEKS)。利用氨基和磺酸基團之間的酸堿離子對作用,一定程度上保證聚合物膜在吸水的過程中溶脹度不會過大,保證聚合物膜具有良好的機械性能以及尺寸穩(wěn)定性。同時由于氨基含量的增大,高溫時質(zhì)子通過“Grotthuss”機理進行傳輸?shù)耐ǖ涝龆?改善了高溫時質(zhì)子交換膜的質(zhì)子傳導率。當氨基含量在40%的時候,100℃時聚合物膜的質(zhì)子傳導率依然能達到0.095 S cm-1。在質(zhì)子交換膜燃料電池膜材料的應用方面具有很大的應用前景。
[Abstract]:Proton exchange membrane fuel cell (PEMFC) is a new type of material with high fuel efficiency, which can provide both kinetic energy and heat energy, as well as facilitate transportation and environmental friendliness.As a core component of the cell, PEM not only insulates methanol and oxidants to ensure the normal use of fuel cells, but also acts as an effective transport carrier of protons, enabling protons to be efficiently transported in fuel cells.Ensure that the fuel cell can work normally, stably and efficiently.The current commercial Nafion series of proton exchange membranes have a good performance in proton conductivity, but in the high temperature operating environment, the fuel (methanol) transmission rate is too high.The main problem of this type of proton exchange membrane is that the proton conductivity decreases too fast.In this paper, two kinds of polymer membranes were prepared to solve these two problems.The hybrid membranes of am-SPAEKS and PVA were prepared by solution blending.The Am-SPAEKS/PVA composite membrane with different ratio was made by changing the composition of PVA. The FT-IR test proved that the composite membrane was successfully prepared, and the other properties of the composite membrane were also tested comprehensively.The stability of the composite membrane is ensured by the hydrogen bonding between amino and sulfonic groups and the interaction of acid and base ion pairs between hydroxyl and sulfonic groups.Compared with the pure Am-SPAEKS proton exchange membrane, the alcohol resistance performance of the membrane is obviously improved. The methanol permeability of 50% Am-SPAEKS / PVA is only 2.95 脳 10-7cm2 s-1 at 25 鈩，

本文編號：1718180