End-group cross-linked polybenzimidazole blend membranes for high temperature proton exchange membrane

Li, Mingyu; Zhang, Gang; Zuo, Huiping; Han, Miaomiao; Zhao, Chengji; Jiang, Hao; Liu, Zhongguo; Zhang, Liyuan; Na, Hui

doi:10.1016/j.memsci.2012.08.058

Cited by 25 publications

(8 citation statements)

References 43 publications

(47 reference statements)

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“…For instance, c-PBI-20 membrane exhibited a conductivity of 232 mS cm –1 at 200 °C, which was about two times higher than that (126 mS cm –1 ) of Ph-PBI membrane (Table ). In addition, due to the enhanced relative concentration of imidazole groups, the present c-PBI membranes also exhibited higher PA uptake and proton conductivity than many other notable cross-linked analogues (Table , refs , , , , and − .). The conductivities of all reference PA–PBI membranes listed in Table were measured at high temperatures (140–180 °C) under low RH conditions (dry air condition or 5% RH).…”

Section: Results and Discussionmentioning

confidence: 76%

“…For example, the c-PBI-20-SiO 2 -2 membrane had a higher mechanical strength of 15 MPa with a much improved PA uptake 329 wt %. Furthermore, the PA-doped c-PBI membranes and SiO 2 /c-PBI-20 composite membranes showed comparable tensile stresses to many other cross-linked and composite PBI membranes with lower PA uptakes (Table , refs , , , and − .). Thus, the PA-doped membranes fabricated in this work show useful mechanical properties suitable for HT-PEM applications.…”

Section: Results and Discussionmentioning

confidence: 83%

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Construction of High-Performance, High-Temperature Proton Exchange Membranes through Incorporating SiO₂ Nanoparticles into Novel Cross-linked Polybenzimidazole Networks

Wang

et al. 2019

ACS Appl. Mater. Interfaces

104

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The practical applications of phosphoric acid-doped polybenzimidazole (PA–PBI) as high-temperature proton exchange membranes (HT-PEMs) are mainly limited by their poor dimensional-mechanical stability at high acid doping levels (ADLs) and the leaching of PA from membranes during fuel cell operation. In this work, to overcome these issues, we fabricated novel cross-linked PBI networks with additional imidazole groups by employing a newly synthesized bibenzimidazole-containing dichloro compound as cross-linker and an arylether-type Ph-PBI as matrix. Ph-PBI featured by good solubility under high molecular weight offers satisfactory film-forming ability and mechanical strength using for the matrix. Importantly, the additional imidazole moieties in BIM-2Cl endow the cross-linked PBI membranes improved dimensional-mechanical stability with simultaneously enhanced ADLs and proton conductivity. Furthermore, superior acid retention capability is obtained by incorporating porous polyhydroxy SiO2 nanoparticles into these cross-linked networks. As a result, the SiO2/cross-linked PBI composite membranes are suitable to manufacture membrane electrode assemblies (MEAs), and an excellent H2/O2 cell performance with a peak power density of 497 mW cm–2 at 160 °C under anhydrous conditions can be achieved.

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Section: Results and Discussionmentioning

confidence: 76%

Section: Results and Discussionmentioning

confidence: 83%

Construction of High-Performance, High-Temperature Proton Exchange Membranes through Incorporating SiO₂ Nanoparticles into Novel Cross-linked Polybenzimidazole Networks

Wang

et al. 2019

ACS Appl. Mater. Interfaces

104

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“…The cross‐linked membrane mostly showed improvement in the chemical stability and proton conductivity compared with noncross‐linked membrane. The acid‐doping ability, proton conductivity, mechanical properties, and oxidative stabilities were improved significantly by the end‐group cross‐link process through a 4,40‐diglycidyl (3,30,5,50‐tetramethylbiphenyl) epoxy resin (TMBP) on the PBI membrane . Yang investigated the effects of three types of epoxides as the cross‐linking agent on a PBI membrane: bisphenol A diglycidyl ether (R1), bisphenol A propoxylate diglycidyl ether (R2), and poly(ethylene glycol) diglycidyl ether (R3).…”

Section: Additives In Different Types Of Membranesmentioning

confidence: 99%

“…The acid-doping ability, proton conductivity, mechanical properties, and oxidative stabilities were improved significantly by the end-group cross-link process through a 4,40-diglycidyl (3,30,5,50-tetramethylbiphenyl) epoxy resin (TMBP) on the PBI membrane. 126 Yang 127 investigated the effects of three types of epoxides as the crosslinking agent on a PBI membrane: bisphenol A diglycidyl ether (R1), bisphenol A propoxylate diglycidyl ether (R2), and poly(ethylene glycol) diglycidyl ether (R3). The mechanical strength improved, and high acid-doping levels increased the proton conductivity for the crosslinked membrane.…”

Section: Polybenzimidazolementioning

confidence: 99%

Recent advances in additive‐enhanced polymer electrolyte membrane properties in fuel cell applications: An overview

2019

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Summary Additives such as fillers, cross‐linkers, and plasticizers have become increasingly important in the polymer nanocomposite production field, especially for enhancing the structural morphology, functional behavior, and final performance of nanocomposites in broad applications. The current work is an overview of the effects of additive substances such as fillers, cross‐linkers, and plasticizers in the polymer electrolyte membrane composites applied to fuel cells. A comparative review is conducted by categorizing fillers into several types, and the most popular cross‐linkers and plasticizers used in fuel cell membranes are included in this review. The highlighted properties include the proton conductivity, permeability, mechanical properties, thermal properties, crystallinity, and structure of additive‐modified nanocomposites. Furthermore, the challenges and future prospects in the additive field are discussed in Section 5.0. This review can provide a reference for researchers seeking specific substances that can be used to enhance nanocomposite properties, especially in membrane fuel cell applications.

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“…Cross-linking is an effective strategy to improve the separation performance and mechanical stability simultaneously. − The interpolymer chain spacing and chain mobility can be quantitatively modified by the cross-linking method. However, cross-linking is generally achieved by UV light irradiation or high-temperature thermal treatment. − Moreover, it requires the introduction of additional cross-linking agents or catalysts, which is unfavorable from an economical point of view.…”

Section: Introductionmentioning

confidence: 99%

High-Performance Self-Cross-Linked PGP–POEM Comb Copolymer Membranes for CO₂ Capture

et al. 2017

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We report a high performance CO 2 capture membrane based on the copolymerization and self-cross-linking of poly(glycidyl methacrylate-g-poly-(propylene glycol))-co-poly(oxyethylene methacrylate) (PGP−POEM) comb copolymer. The epoxide−amine reaction is responsible for the self-cross-linking reaction, which takes place under mild conditions without any additional crosslinkers or catalysts. The effects of self-cross-linking on the membrane properties are investigated by comparing the copolymers with those containing a low PPG grafting density (l-PGP−POEM). Furthermore, the gas separation performance of the membranes is systematically investigated as a function of POEM content in the comb copolymer. Both the permeance and selectivity of the PGP−POEM membranes are enhanced simultaneously with increase in the POEM content up to 51.2 wt % (PGP−POEM13), at which the best performance was achieved among the membranes. The high performance results from the reduced diffusion of N 2 due to the self-cross-linked structure as well as the increased CO 2 solubility due to the high content of ether oxygen groups in the comb copolymer. By optimizing the membrane thickness, the performance is further improved up to a CO 2 permeance of 500 GPU (1 GPU = 10 −6 cm 3 (STP)/(s cm 2 cmHg)) and CO 2 /N 2 selectivity of 22.4, which is close to the commercialization target area of CO 2 capture membranes. This work suggests a simple and economical crosslinking method to fabricate the membranes with excellent gas separation performance.

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End-group cross-linked polybenzimidazole blend membranes for high temperature proton exchange membrane

Cited by 25 publications

References 43 publications

Construction of High-Performance, High-Temperature Proton Exchange Membranes through Incorporating SiO₂ Nanoparticles into Novel Cross-linked Polybenzimidazole Networks

Construction of High-Performance, High-Temperature Proton Exchange Membranes through Incorporating SiO₂ Nanoparticles into Novel Cross-linked Polybenzimidazole Networks

Recent advances in additive‐enhanced polymer electrolyte membrane properties in fuel cell applications: An overview

High-Performance Self-Cross-Linked PGP–POEM Comb Copolymer Membranes for CO₂ Capture

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End-group cross-linked polybenzimidazole blend membranes for high temperature proton exchange membrane

Cited by 25 publications

References 43 publications

Construction of High-Performance, High-Temperature Proton Exchange Membranes through Incorporating SiO2 Nanoparticles into Novel Cross-linked Polybenzimidazole Networks

Construction of High-Performance, High-Temperature Proton Exchange Membranes through Incorporating SiO2 Nanoparticles into Novel Cross-linked Polybenzimidazole Networks

Recent advances in additive‐enhanced polymer electrolyte membrane properties in fuel cell applications: An overview

High-Performance Self-Cross-Linked PGP–POEM Comb Copolymer Membranes for CO2 Capture

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Construction of High-Performance, High-Temperature Proton Exchange Membranes through Incorporating SiO₂ Nanoparticles into Novel Cross-linked Polybenzimidazole Networks

Construction of High-Performance, High-Temperature Proton Exchange Membranes through Incorporating SiO₂ Nanoparticles into Novel Cross-linked Polybenzimidazole Networks

High-Performance Self-Cross-Linked PGP–POEM Comb Copolymer Membranes for CO₂ Capture