Adjust the arrangement of imidazole on the metal-organic framework to obtain hybrid proton exchange membrane with long-term stable high proton conductivity

Zhang, Zhenguo; Ren, Jiahui; Xu, Jingmei; Wang, Zhe; He, Wenwen; Wang, Shuang; Yang, Xudong; Du, Xinming; Meng, L.; Zhao, Pengyun

doi:10.1016/j.memsci.2020.118194

Cited by 92 publications

(37 citation statements)

References 65 publications

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“…The proton conductivity of PEM is one of the most important parameters of DMFCs. 28,31,32 The proton conductivity of PEM must be not less than 10 mS/cm to be of application value. 33 Generally, a high IEC value and water absorption are conducive to proton conduction, but too high of water absorption will affect the dimensional stability of the membrane.…”

Section: Resultsmentioning

confidence: 99%

The preparation of novel sulfonated poly(aryl ether ketone sulfone)/TiO₂ composite membranes with low methanol permeability for direct methanol fuel cells

Yuan

Wang

2020

High Performance Polymers

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A sulfonated poly(aryl ether ketone sulfone) (SPAEKS) with locally dense sulfonic acid groups is synthesized and different amounts of TiO2 is doped into SPAEKS matrix to prepare composite membranes (SPAEKS/TiO2-x). SEM shows that TiO2 in the composite membranes has good dispersibility when TiO2 content is not higher than 3%. The composite membranes show good mechanical properties, dimensional stability and oxidative stability. The proton conductivity of composite membranes is near to that of Nafion 117 membrane and methanol permeability of composite membranes is much lower than that of Nafion 117 membrane. Therefore, the proton selectivity of composite membranes is higher than that of Nafion 117 membrane. In particular, proton selectivity of SPAEKS/TiO2-3% (12.8 × 104 S s cm−3) is four times higher than that of Nafion 117 membrane (3.2 × 104 S s cm−3).

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Section: Resultsmentioning

confidence: 99%

The preparation of novel sulfonated poly(aryl ether ketone sulfone)/TiO₂ composite membranes with low methanol permeability for direct methanol fuel cells

Yuan

Wang

2020

High Performance Polymers

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“…In 2020, considering that the pore size (7.4 Å) of MOF-801 is suitable for the introduction of imidazole units (4.3 × 3.7 Å 2 ), Z. Zhang and co-workers introduced imidazole into this framework in two different ways (impregnation and in situ methods) to prepare two related MOFs, Him@MOF-801 with free imidazole units incorporating inside the pores and Him-MOF-801 with imidazole coordinating with the zirconium atoms. 78 PXRD determinations demonstrated that the structures of the three compounds are basically the same, although the imidazole introduced has a slight effect on the strength and position of some diffraction peaks. Moreover, after soaking in 80°C H 2 O and 1 M hydrochloric acid aqueous solution for seven days, the two compounds Him@MOF-801 and Him-MOF-801 remained structurally rigid.…”

Section: Other Carboxylate-based Zr-mofsmentioning

confidence: 91%

Proton conductive Zr-based MOFs

Chen

2020

Inorg. Chem. Front.

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“…All sulfonic acids are on the side chain of SPEEK [38] can serve as transport sites for the protons to transport by Grotthuss mechanism, and the water as vehicles for protons to transport by vehicle mechanism in PEM [39,40]. IEC values mean the quantity of SO 3 H in the SPEEK and more sulfonic acids mean high proton transportability but it would cause a high SR of NCM and low mechanical performance [41]. Therefore, it is important for PEM to have a proper SR and WU.…”

Section: Wu and Sr Of X-pi/speek Ncmsmentioning

confidence: 99%

Study on the PI/SPEEK nanofiber composite proton exchange membrane for fuel cells

Wei

Huang

et al. 2022

J. Phys.: Conf. Ser.

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Sulfonated poly ether ether ketone (SPEEK) can be selected as the candidate for proton exchange membrane (PEM) used in the fuel cell for its cheap price, great proton conductivity and stability. To further improve its performance, more SO3H were induced into SPEEK but would result in excessive swelling and losing its stability. Polyimide (PI) nanofibers have excellent mechanical properties and can be a supporter to improve stability. In this work, the PI nanofiber was put in the middle of the SPEEK to create the PI/SPEEK nanofiber composite membranes (NCMs). Its morphology of PI/SPEEK NCMs observed by SEM showed that PI nanofiber was almost in the middle of these NCMs. The proton conductivity and swelling ratio of 3%PI/SPEEK were 271.7 mScm-1 and 20.0% at 60°C and 100% RH, which is 29.6% higher and 90.4% lower than that of pristine SPEEK. It was intact after the single-cell test in the fuel cell and its power density was 199.1 mWcm-2, but for pure SPEEK there was some broken area on it. The reason was that PI/SPEEK can maintain the durability of the channels for the proton to transport and it can be attributed to an interaction at their interface of PI nanofiber and SPEEK. The 3%PI/SPEEK NCM will have a broad application prospect in PEM fuel cells.

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Adjust the arrangement of imidazole on the metal-organic framework to obtain hybrid proton exchange membrane with long-term stable high proton conductivity

Cited by 92 publications

References 65 publications

The preparation of novel sulfonated poly(aryl ether ketone sulfone)/TiO₂ composite membranes with low methanol permeability for direct methanol fuel cells

The preparation of novel sulfonated poly(aryl ether ketone sulfone)/TiO₂ composite membranes with low methanol permeability for direct methanol fuel cells

Proton conductive Zr-based MOFs

Study on the PI/SPEEK nanofiber composite proton exchange membrane for fuel cells

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Adjust the arrangement of imidazole on the metal-organic framework to obtain hybrid proton exchange membrane with long-term stable high proton conductivity

Cited by 92 publications

References 65 publications

The preparation of novel sulfonated poly(aryl ether ketone sulfone)/TiO2 composite membranes with low methanol permeability for direct methanol fuel cells

The preparation of novel sulfonated poly(aryl ether ketone sulfone)/TiO2 composite membranes with low methanol permeability for direct methanol fuel cells

Proton conductive Zr-based MOFs

Study on the PI/SPEEK nanofiber composite proton exchange membrane for fuel cells

Contact Info

Product

Resources

About

The preparation of novel sulfonated poly(aryl ether ketone sulfone)/TiO₂ composite membranes with low methanol permeability for direct methanol fuel cells

The preparation of novel sulfonated poly(aryl ether ketone sulfone)/TiO₂ composite membranes with low methanol permeability for direct methanol fuel cells