Constructing proton-conductive highways within an ionomer membrane by embedding sulfonated polymer brush modified graphene oxide

Zhao, Liping; Li, Yifan; Zhang, Haoqin; Wu, Wenjia; Liu, Jindun; Wang, Jingtao

doi:10.1016/j.jpowsour.2015.04.005

Cited by 138 publications

(105 citation statements)

References 62 publications

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“…A detailed method of measuring the H 2 permeability can be found in the ref. 37. The measurement was repeated three times for each membrane using different specimens, and the average value was used for calculation.…”

Section: Hydrogen (H 2 ) Permeabilitymentioning

confidence: 99%

Sulfonated graphene oxide/Nafion composite membranes for high temperature and low humidity proton exchange membrane fuel cells

et al. 2018

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Iron oxide (Fe 3 O 4 ) nanoparticles anchored over sulfonated graphene oxide (SGO) and Nafion/Fe 3 O 4 -SGO composites were fabricated and applied as potential proton exchange membranes in proton exchange membrane fuel cells (PEMFCs) operated at high temperature and low humidity. Fe 3 O 4 nanoparticles bridge SGO and Nafion through electrostatic interaction/hydrogen bonding and increased the intrinsic thermal and mechanical stabilities of Nafion/Fe 3 O 4 -SGO composite membranes. Nafion/Fe 3 O 4 -SGO composite membranes increased the compactness of ionic domains and enhanced the water absorption and proton conductivity while restricting hydrogen permeability across the membranes. The proton conductivity of Nafion/Fe 3 O 4 -SGO (3 wt%) composite membrane at 120 C under 20% relative humidity (RH) was 11.62 mS cm À1, which is 4.74 fold higher than that of a pristine recast Nafion membrane. PEMFC containing the Nafion/Fe 3 O 4 -SGO composite membrane delivered a peak power density of 258.82 mW cm À2 at a load current density of 640.73 mA cm À2 while operating at 120 C under 25% RH and ambient pressure. In contrast, under identical operating conditions, a peak power density of only 144.89 mW cm À2 was achieved with the pristine recast Nafion membrane at a load current density of 431.36 mA cm À2. Thus, Nafion/Fe 3 O 4 -SGO composite membranes can be used to address various critical problems associated with commercial Nafion membranes in PEMFC applications.

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Section: Hydrogen (H 2 ) Permeabilitymentioning

confidence: 99%

Sulfonated graphene oxide/Nafion composite membranes for high temperature and low humidity proton exchange membrane fuel cells

et al. 2018

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“…17 Prior dried (at 100 C for 5 h) membrane specimens were weighed and submerged in DI water at various temperatures (20,40, 60 and 80 C) for 24 h to attain equilibrium. Aerward, the water on the surface of specimens was carefully blotted with tissue paper and weighed again.…”

Section: Water Uptakementioning

confidence: 99%

“…40 The gas was supplied at a ow pressure rate of 1 barrer, and the temperature was kept constant at 30 C throughout the measurement. Each reported value is the average of three measurements and the error limit for gas permeability is +0.05.…”

Section: Gas Permeabilitymentioning

confidence: 99%

“…Table S1, † Fig. 7b show the volume changes occurred in membranes aer water uptake at different temperatures (20,40, 60 and 80 C). The volume change of hybrid membranes demonstrates a similar dependence to that of water uptake.…”

Section: Water Uptake Volume Change Iec Hydration Number and Boundmentioning

confidence: 99%

“…4 40,43,44 Compared to SP, the hybrid membranes reveal a new low intensity peak at 2784 cm À1 , which is attributed to C-F stretching of aromatic rings in FPAPB. The slight peak shis (especially -OH peaks) in SPF and SPFSGF-5 The crystalline faces of GO, FGO and Fe 3 O 4 -FGO were analysed by using XRD, and the corresponding patterns are presented in Fig.…”

mentioning

confidence: 96%

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Toward improved mechanical strength, oxidative stability and proton conductivity of an aligned quadratic hybrid (SPEEK/FPAPB/Fe₃O₄-FGO) membrane for application in high temperature and low humidity fuel cells

et al. 2017

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The peak proton conductivity of aligned SPFSGF-5 membrane at 120 C under 20% RH is 11.13 mS cm À1, which is 1.44 fold better than that of pristine SP membrane (7.68 mS cm À1 ). In contrast, under identical operating conditions, the Nafion-112 membrane exhibited a peak proton conductivity of 9.78 mS cm À1 , a 1.13 fold lower conductivity compared to aligned quadratic hybrid membrane. Furthermore, the aligned quadratic hybrid membrane exhibited lower H 2 and O 2 gas permeability compared to pristine SP and unaligned quadratic hybrid membranes.

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Rational Materials and Structure Design for Improving the Performance and Durability of High Temperature Proton Exchange Membranes (HT‐PEMs)

Song,

Zhao,

Zhou

et al. 2023

Advanced Science

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Hydrogen energy as the next‐generation clean energy carrier has attracted the attention of both academic and industrial fields. A key limit in the current stage is the operation temperature of hydrogen fuel cells, which lies in the slow development of high‐temperature and high‐efficiency proton exchange membranes. Currently, much research effort has been devoted to this field, and very innovative material systems have been developed. The authors think it is the right time to make a short summary of the high‐temperature proton exchange membranes (HT‐PEMs), the fundamentals, and developments, which can help the researchers to clearly and efficiently gain the key information. In this paper, the development of key materials and optimization strategies, the degradation mechanism and possible solutions, and the most common morphology characterization techniques as well as correlations between morphology and overall properties have been systematically summarized.

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Constructing proton-conductive highways within an ionomer membrane by embedding sulfonated polymer brush modified graphene oxide

Cited by 138 publications

References 62 publications

Sulfonated graphene oxide/Nafion composite membranes for high temperature and low humidity proton exchange membrane fuel cells

Sulfonated graphene oxide/Nafion composite membranes for high temperature and low humidity proton exchange membrane fuel cells

Toward improved mechanical strength, oxidative stability and proton conductivity of an aligned quadratic hybrid (SPEEK/FPAPB/Fe₃O₄-FGO) membrane for application in high temperature and low humidity fuel cells

Rational Materials and Structure Design for Improving the Performance and Durability of High Temperature Proton Exchange Membranes (HT‐PEMs)

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Constructing proton-conductive highways within an ionomer membrane by embedding sulfonated polymer brush modified graphene oxide

Cited by 138 publications

References 62 publications

Sulfonated graphene oxide/Nafion composite membranes for high temperature and low humidity proton exchange membrane fuel cells

Sulfonated graphene oxide/Nafion composite membranes for high temperature and low humidity proton exchange membrane fuel cells

Toward improved mechanical strength, oxidative stability and proton conductivity of an aligned quadratic hybrid (SPEEK/FPAPB/Fe3O4-FGO) membrane for application in high temperature and low humidity fuel cells

Rational Materials and Structure Design for Improving the Performance and Durability of High Temperature Proton Exchange Membranes (HT‐PEMs)

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Toward improved mechanical strength, oxidative stability and proton conductivity of an aligned quadratic hybrid (SPEEK/FPAPB/Fe₃O₄-FGO) membrane for application in high temperature and low humidity fuel cells