Composite membranes based on polybenzimidazole and ionic liquid functional Si–O–Si network for HT-PEMFC applications

Tian, Xue; Wang, Shuang; Li, Jinsheng; Liu, Fengxiang; Wang, Xu; Chen, Hao; Ni, Hongzhe; Wang, Zhe

doi:10.1016/j.ijhydene.2017.07.071

Cited by 49 publications

(34 citation statements)

References 38 publications

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“…The family of polymers based on PBI could be a promising candidate for the preparation of composite membranes with MOFs. The good compatibility of PBI with MOFs, particularly, those containing imidazolate moieties, i.e., ZIFs, has been shown by recent studies of PBI composite membranes doped with ZIFs as promising materials for gas separation …”

Section: Mofs As Fillers In Mixed‐matrix Membranes For Pemfcmentioning

confidence: 97%

Proton Conductivity of Composite Polyelectrolyte Membranes with Metal‐Organic Frameworks for Fuel Cell Applications

Escorihuela

Narducci

Compañ

et al. 2018

Adv Materials Inter

141

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The study of proton conductivity processes has gained intensive attention in the past decades due to their potential applications in chemical sensors, electrochemical devices, and energy generation. The scientific community has focused its efforts on the development of high‐performing polymeric membranes as proton exchange membranes (PEMs) for fuel cell (FC) applications. In particular, high conductivity at different humidity and temperature and enhanced chemical and mechanical stability under operative conditions are considered the main goals to be reached. The design of mixed‐matrix membranes (MMMs) based on conductive polymers and inorganic fillers is an approach commonly used for achieving materials with improved conductive and mechanical properties. In the last five years, the use of metal‐organic frameworks (MOFs) as fillers for conductive MMMs has rapidly grown for their intrinsic stability and structural versatility. The recent progress around the proton conductivity of MOF based composite membranes on PEMs for FC applications is critically reviewed.

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Section: Mofs As Fillers In Mixed‐matrix Membranes For Pemfcmentioning

confidence: 97%

Proton Conductivity of Composite Polyelectrolyte Membranes with Metal‐Organic Frameworks for Fuel Cell Applications

Escorihuela

Narducci

Compañ

et al. 2018

Adv Materials Inter

141

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“…The presence of aromatic content is very high in LMP, which is the reason for the intense peak observed in this range. In the powder X‐ray diffraction of LMP [Figure (b)], the amorphous peak at 26° [Supporting Information 1, corresponding interchain distance is 3.43 A° (wavelength of Cu Kα line is 1.5419 Å)] is attributed to the distance between two parallel benzimidazole chains . However, the peak is sharper than that of PBI with high molecular weight .…”

Section: Resultsmentioning

confidence: 99%

Polybenzimidazole as proton conducting filler in polydimethylsiloxane: Enhanced oxidative stability and membrane properties

Kumar

Sana

Unnikrishnan

et al. 2019

J of Applied Polymer Sci

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In this work, pyridine‐based low‐molecular‐weight polybenzimidazole (LMP) was synthesized (inherent viscosity: 0.52 dL g−1) by controlling the reaction time. The synthesized LMP was incorporated into polydimethylsiloxane (PDMS) matrix to impart proton conductivity. The composite membrane containing 30 wt % of LMP exhibited proton conductivity of 16 mS cm−1 at 100–120 °C. The LMP chains were bundled and formed clusters (aggregates) in the PDMS matrix as observed in field emission scanning electron microscopy. This is attributed to nonpolar (siloxane)–polar (polybenzimidazole) repulsion. An impressive weight loss of 8.6% was observed after 120 h Fenton's test that indicates the high oxidative stability of composite membranes. However, elongation of composite membranes was decreased compared to that of pristine PDMS, which is attributed to the incorporation of rigid LMP chains. The resultant composite membranes exhibited moderate proton conductivity, low moisture absorption, and good thermal stability. © 2019 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2019, 136, 48151.

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“…The sulfonation process was conducted according to Beauger et al [34]. 50 except that no S-Sep inorganic particles were added during the synthesis process.…”

Section: Sulfonation Modificationmentioning

confidence: 99%

“…Acid retention, swelling ratio, and swelling volume measurements of ABPBI and ABPBI/S-Sep composite membranes were conducted according to previous reports [20,49,50]. All membranes were first completely dried in a vacuum oven at 110 °C for 24 h and their weights and dimensions in x, y, and z direction were noted.…”

Section: Characterization Of Membranesmentioning

confidence: 99%

Poly(2,5-benzimidazole)/sulfonated sepiolite composite membranes with low phosphoric acid doping levels for PEMFC applications in a wide temperature range

Zhang

Liu

Xia

et al. 2019

Journal of Membrane Science

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To broaden the operating temperature range of phosphoric acid (PA) doped polybenzimidazole membrane-based proton exchange membrane fuel cells (PEMFCs) toward low temperatures, a novel series of poly(2,5-benzimidazole) (ABPBI)/sulfonated sepiolite (S-Sep) composite membranes (ABPBI/S-Sep) with low PA doping levels (DLs) were prepared via in-situ synthesis. The desirably enhanced mechanical, thermal, and oxidative stabilities of ABPBI/S-Sep composite membranes were achieved by constructing ABPBI chains arranged along the sepiolite (Sep) fibers 2 and acid-base crosslinks formed between S-Sep fibrous particles and ABPBI chains. Benefiting from the richness of high temperature stable bound water and the excellent water absorbability of Sep particles that enable the formation of additive proton conducting paths, the composite membranes retained bounded PA and achieved much higher proton conductivities under both anhydrous and hydrous conditions compared to PA-doped ABPBI membranes. Proton conductivity values above 0.01 S/cm at 40-90 °C/20-98% RH conditions and 90-180 °C/anhydrous conditions as well as peak power density of 0.13 and 0.23 W/cm 2 at 80 and 180 °C with 0% RH, respectively from the ABPBI/2S-Sep composite membrane are more holistic compared to Nafion at low temperatures and polybenzimidazole-based membranes at high temperatures, respectively. The excellent properties of ABPBI/S-Sep composite membranes suggest them as prospective candidates for PEMFCs applications in a wide temperature range.

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Composite membranes based on polybenzimidazole and ionic liquid functional Si–O–Si network for HT-PEMFC applications

Cited by 49 publications

References 38 publications

Proton Conductivity of Composite Polyelectrolyte Membranes with Metal‐Organic Frameworks for Fuel Cell Applications

Proton Conductivity of Composite Polyelectrolyte Membranes with Metal‐Organic Frameworks for Fuel Cell Applications

Polybenzimidazole as proton conducting filler in polydimethylsiloxane: Enhanced oxidative stability and membrane properties

Poly(2,5-benzimidazole)/sulfonated sepiolite composite membranes with low phosphoric acid doping levels for PEMFC applications in a wide temperature range

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