A comprehensive study of MIL-88a as a key component of hybrid polymer electrolytes for H2 fuel cells

IF 8.1 2区工程技术 Q1 CHEMISTRY, PHYSICAL

International Journal of Hydrogen Energy Pub Date : 2025-04-26 DOI:10.1016/j.ijhydene.2025.04.316

Ivan Gorban , María Teresa Pérez-Prior , Maksim Gritsai , Alejandro Várez , Nieves Ureña , Belén Levenfeld , Jean-Yves Sanchez , Carmen del Río , Mikhail Soldatov

{"title":"A comprehensive study of MIL-88a as a key component of hybrid polymer electrolytes for H2 fuel cells","authors":"Ivan Gorban , María Teresa Pérez-Prior , Maksim Gritsai , Alejandro Várez , Nieves Ureña , Belén Levenfeld , Jean-Yves Sanchez , Carmen del Río , Mikhail Soldatov","doi":"10.1016/j.ijhydene.2025.04.316","DOIUrl":null,"url":null,"abstract":"<div><div>In this work, an electrochemical study of the iron fumarate metal-organic framework structure MIL-88a was carried out. This MOF exhibits an exceptional characteristic: it alters the parameters of its crystal lattice in response to temperature variations and the specific guest molecules present. Through impedance spectroscopy, we investigated how guest molecules within the pores of MIL-88a influence the material's ionic conductivity and its responsiveness to changing environmental conditions. Based on the data obtained, hybrid membranes based on sulfonated multiblock copolymers of polysulfone and polyphenylsulfone (SPES) doped with MIL-88a were prepared. The distribution of crystallites in the membrane was assessed by using scanning electron microscopy. It was found that crystallites agglomerates reduce the tensile strength of the membrane from 87 to 69 MPa, and from 56 to 42 MPa in the dry and wet forms, respectively. The presence of this MOF doubles the water absorption of the hybrid membranes compared to the pure one, resulting in an improvement of their ionic conductivity from 15.8 to 26.5 mS/cm at 80 °C. Hybrid membranes show a high maximum power density (1040 mWcm<sup>−2</sup>) in the fuel single cell test that is comparable to that obtained for commercial perfluoro-sulfonic acid PEMs such as Nafion®.</div></div>","PeriodicalId":337,"journal":{"name":"International Journal of Hydrogen Energy","volume":"131 ","pages":"Pages 98-108"},"PeriodicalIF":8.1000,"publicationDate":"2025-04-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"International Journal of Hydrogen Energy","FirstCategoryId":"5","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S036031992502004X","RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"CHEMISTRY, PHYSICAL","Score":null,"Total":0}

引用次数: 0

Abstract

In this work, an electrochemical study of the iron fumarate metal-organic framework structure MIL-88a was carried out. This MOF exhibits an exceptional characteristic: it alters the parameters of its crystal lattice in response to temperature variations and the specific guest molecules present. Through impedance spectroscopy, we investigated how guest molecules within the pores of MIL-88a influence the material's ionic conductivity and its responsiveness to changing environmental conditions. Based on the data obtained, hybrid membranes based on sulfonated multiblock copolymers of polysulfone and polyphenylsulfone (SPES) doped with MIL-88a were prepared. The distribution of crystallites in the membrane was assessed by using scanning electron microscopy. It was found that crystallites agglomerates reduce the tensile strength of the membrane from 87 to 69 MPa, and from 56 to 42 MPa in the dry and wet forms, respectively. The presence of this MOF doubles the water absorption of the hybrid membranes compared to the pure one, resulting in an improvement of their ionic conductivity from 15.8 to 26.5 mS/cm at 80 °C. Hybrid membranes show a high maximum power density (1040 mWcm⁻²) in the fuel single cell test that is comparable to that obtained for commercial perfluoro-sulfonic acid PEMs such as Nafion®.

Abstract Image

查看原文本刊更多论文

MIL-88a作为氢燃料电池混合聚合物电解质关键组分的综合研究

本文对富马酸铁金属-有机骨架结构MIL-88a进行了电化学研究。这种MOF表现出一种特殊的特性：它根据温度变化和存在的特定客体分子改变其晶格的参数。通过阻抗谱，我们研究了MIL-88a孔隙中的客体分子如何影响材料的离子电导率及其对变化环境条件的响应。在此基础上，制备了掺杂MIL-88a的聚砜和聚苯砜磺化多嵌段共聚物（SPES）杂化膜。用扫描电镜观察了膜中微晶的分布。结果表明，在干态和湿态下，结晶团块使膜的抗拉强度分别从87降至69 MPa和56降至42 MPa。与纯膜相比，MOF的存在使杂化膜的吸水性提高了一倍，从而使其离子电导率在80°C时从15.8 mS/cm提高到26.5 mS/cm。混合膜在燃料单电池测试中显示出较高的最大功率密度（1040 mWcm−2），可与商用全氟磺酸pem（如Nafion®）相媲美。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

求助全文

约1分钟内获得全文求助全文

来源期刊

International Journal of Hydrogen Energy 工程技术-环境科学

CiteScore

13.50

自引率

25.00%

发文量

3502

审稿时长

60 days

期刊介绍： The objective of the International Journal of Hydrogen Energy is to facilitate the exchange of new ideas, technological advancements, and research findings in the field of Hydrogen Energy among scientists and engineers worldwide. This journal showcases original research, both analytical and experimental, covering various aspects of Hydrogen Energy. These include production, storage, transmission, utilization, enabling technologies, environmental impact, economic considerations, and global perspectives on hydrogen and its carriers such as NH3, CH4, alcohols, etc. The utilization aspect encompasses various methods such as thermochemical (combustion), photochemical, electrochemical (fuel cells), and nuclear conversion of hydrogen, hydrogen isotopes, and hydrogen carriers into thermal, mechanical, and electrical energies. The applications of these energies can be found in transportation (including aerospace), industrial, commercial, and residential sectors.