Toward enhanced conductivity of high-temperature proton exchange membranes: development of novel PIM-1 reinforced PBI alloy membranes

Wang, Peng; Liu, Zhenchao; Li, Xiaobai; Peng, Jinwu; Hu, Wei; Liu, Baijun

doi:10.1039/c9cc02102g

Cited by 74 publications

(29 citation statements)

References 31 publications

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“…For example, different PEMs based on BaZrO 3 nanoparticles, SrCeO 3 nanoparticles, and Fe 2 TiO 5 nanoparticles have been introduced by our groups. Furthermore, PBI is a basic polymer with low cost, which can be doped with strong acids to form PEMs with high proton conductivity . In recent years, PA‐PBI–based PEMs are extensively used in PEM fuel cells.…”

Section: Introductionmentioning

confidence: 99%

“…Furthermore, PBI is a basic polymer with low cost, which can be doped with strong acids to form PEMs with high proton conductivity. 17,18 In recent years, PA-PBI-based PEMs are extensively used in PEM fuel cells. The interesting features of the PA-PBIbased PEMs for application in elevated temperatures include excellent endurance and good thermal/chemical properties due to its rigid aromatic backbone at high temperatures.…”

Section: Introductionmentioning

confidence: 99%

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Novel nanocomposite membranes based on PBI and doped‐perovskite nanoparticles as a strategy for improving PEMFC performance at high temperatures

2020

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Summary In this work, Sr2+ dopant effects of Ba0.9Sr0.1TiO3 and La0.9Sr0.1CrO3‐δ doped‐perovskite nanoparticles on increasing proton conductivity, fuel cell performance, and mechanical and thermal stability of polybenzimidazole‐based nanocomposite membranes were studied. The Sr2+ dopant creates cation vacancies in Ba0.9Sr0.1TiO3 doped‐perovskite nanoparticles and oxygen vacancies in La0.9Sr0.1CrO3‐δ doped‐perovskite nanoparticles. The oxygen vacancies, which decrease columbic repulsion between protons and positive ions, have a more important role than the cation vacancies. They provide high surface area and high interfacial interaction between La0.9Sr0.1CrO3‐δ doped‐perovskite nanoparticles, phosphoric acid, and polybenzimidazole for proton transfer and increase the proton conductivity of the nanocomposite membranes. In addition, the results of relative humidity effects showed that the ordered arrangement of oxygen vacancies of the La0.9Sr0.1CrO3‐δ doped‐perovskite nanoparticles creates a specific pathway in the nanocomposite membranes for increasing proton transfer in the presence of relative humidity. Furtheremore, at phosphoric acid doping level of 13 mol phosphoric acid per monomer unit, proton conductivity of the nanocomposite membranes containing 8 wt.% La0.9Sr0.1CrO3‐δ doped‐perovskite nanoparticles was obtained as 126 mS cm‐1 at 180°C and 6% relative humidity. The nanocomposite membrane showed the best performance and the power density of 0.62 W cm‐2 at 180°C and 0.5 V.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Novel nanocomposite membranes based on PBI and doped‐perovskite nanoparticles as a strategy for improving PEMFC performance at high temperatures

2020

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“…Besides, The PA doped BHC2 membrane with two phases benefits the proton transport because porous PAM hydrogels phase and ZrO 2 nanoparticles can absorb more PA. [59] The concentrated distribution of PA in the porous channel of PAM hydrogels and porous carbon-ZrO 2, which provide a high-speed channel for proton transport. [64] The mechanical properties of the membranes are evaluated via the stress-strain test, as shown in Figure 6c and Figure S6 in the Supporting Information. Regarding the dry membranes, B exhibits excellent tensile stress and strain due to the branched structure.…”

Section: Thermal and Chemical Stabilities As Well As The Mechanical Properties Of The Membranesmentioning

confidence: 99%

Construction of Stable Wide‐Temperature‐Range Proton Exchange Membranes by Incorporating a Carbonized Metal–Organic Frame into Polybenzimidazoles and Polyacrylamide Hydrogels

Yin

Liang

et al. 2021

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Fuel cells (FCs) are promising energy devices owing to their high efficiency and minimized pollutant emission. Among the various types of FCs, the proton exchange membrane fuel cell-based ones (PEMFC) are attractive in automobile, portable, and transportation power applications. [1][2][3][4] Presently, high-temperature PEMFCs (HT-PEMFCs) operating at >140 °C are greatly interesting because of their high carbon monoxide tolerance, high electrode kinetics, and simplified water/thermal management systems. [5][6][7] Phosphoric acid-doped polybenzimidazole (PA-PBI) is a promising candidate for high-temperature proton exchange membrane (HT-PEM) owing to its excellent chemical and thermal stabilities, as well as good protonconducting capability, at elevated temperatures and low humidity. [8][9][10] However, the rapid decrease in the proton-conducting capability of PA-PBI at a low temperature (<100 °C) owing to fast loss of phosphoric acid caused by water accumulated in the frequent cold start-ups (condensate water) and oxygen reduction reactions (water produced by the chemical reaction) at the FCs cathode during normal vehicle drive cycles, has limited their application in FC electric vehicles (FCEVs). [11] In the PA-PBI membrane, the interaction energy of PA-water is much stronger than interaction energy between PA-BI and two PAs. The water molecules from the environment penetrate into the PA cluster of PA-PBI until the base polymers cannot hold the water and PA and bring "loosely bound" PA molecules out of the membrane (PA leaching). [12] To address the aforementioned issue, our group incorporated polyacrylamide (PAM) hydrogels into poly(4,4′-diphenylether-5,5′-bibenzimidazole) (OPBI), named OPBI-AM, to prepare a wide-temperature-range PEM. [13] The OPBI-AM membrane was self-assembled from OPBI and acrylamide, after which PAM was naturally formed beneath OPBI. The water and PA absorptions of the PAM hydrogels improved the low-and hightemperature conductivities of OPBI-AM, they also accounted for the large swell ratio of PEM, which severely deteriorated the performance and durability of PEMFC. This cold start-up challenge must be improved. The introduction of branched Proton exchange membrane fuel cells (PEMFCs) are promising devices for clean power generation in fuel cell electric vehicles applications. The further request of high-efficiency and cost competitive technology make high-temperature proton exchange membranes utilizing phosphoric aciddoped polybenzimidazole be favored because they can work well up to 180 °C without extra humidifier. However, they face quick loss of phosphoric acid below 120 °C and resulting in the limits of commercialization. Herein UiO-66 derived carbon (porous carbon-ZrO 2 ), comprising branched poly(4,4′-diphenylether-5,5′-bibenzimidazole) and polyacrylamide hydrogels self-assembly (BHC1-4) membranes for wide-temperature-range operation (80-160 °C) is presented. These two-phase membranes contained the hygroscopicity of polyacrylamide hydrogels improve the low-temperature proton conductiv...

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“…The use of the Nafion membrane as the most widely used PEMs is limited due to its high cost, comparably large fuel crossover, poor mechanical reliability, and the risk of polymer structure rupture at the operating temperatures above 100 • C [123,124]. On the other hand, HT-PEM fuel cells offer many benefits, such as providing more prominent working voltage, alleviating the effect of CO poisoning in electrodes, and gaining better cell efficiency [125]. PBI has been reported to be used in the HT-PEM fuel cell membrane because it can provide excellent chemical, thermal, oxidative, and hydrolytic stability at high temperatures [126].…”

Section: High-temperature Pems Based On Pbimentioning

confidence: 99%

“…Materials of the perovskite-type mainly absorb inorganic fillers for PEMs at high temperatures due to their high thermal stability and suitable conductivity of the protons [153]. Perovskites with a wide range of chemical and physical properties have a chemical formula of ABO 3 where A (A cations are 12-coordinated by oxygen and have a large ionic radius of the same size as the oxygen ion) and B (B cations are 6-coordinated by oxygen and have a small ionic radius located in the octahedral holes between the closed AO layers) are the appropriate cations [125,154,155]. The stable structure of perovskite oxides is due to their balanced geometry and valence of the basic atoms.…”

Section: High-temperature Pems Based On Pbimentioning

confidence: 99%

A Review of Recent Developments and Advanced Applications of High-Temperature Polymer Electrolyte Membranes for PEM Fuel Cells

et al. 2021

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This review summarizes the current status, operating principles, and recent advances in high-temperature polymer electrolyte membranes (HT-PEMs), with a particular focus on the recent developments, technical challenges, and commercial prospects of the HT-PEM fuel cells. A detailed review of the most recent research activities has been covered by this work, with a major focus on the state-of-the-art concepts describing the proton conductivity and degradation mechanisms of HT-PEMs. In addition, the fuel cell performance and the lifetime of HT-PEM fuel cells as a function of operating conditions have been discussed. In addition, the review highlights the important outcomes found in the recent literature about the HT-PEM fuel cell. The main objectives of this review paper are as follows: (1) the latest development of the HT-PEMs, primarily based on polybenzimidazole membranes and (2) the latest development of the fuel cell performance and the lifetime of the HT-PEMs.

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Toward enhanced conductivity of high-temperature proton exchange membranes: development of novel PIM-1 reinforced PBI alloy membranes

Abstract: Polymers of intrinsic microporosity are for the first time incorporated into PBIs to form some novel alloys for HT-PEMFC applications.

Cited by 74 publications

References 31 publications

Novel nanocomposite membranes based on PBI and doped‐perovskite nanoparticles as a strategy for improving PEMFC performance at high temperatures

Novel nanocomposite membranes based on PBI and doped‐perovskite nanoparticles as a strategy for improving PEMFC performance at high temperatures

Construction of Stable Wide‐Temperature‐Range Proton Exchange Membranes by Incorporating a Carbonized Metal–Organic Frame into Polybenzimidazoles and Polyacrylamide Hydrogels

A Review of Recent Developments and Advanced Applications of High-Temperature Polymer Electrolyte Membranes for PEM Fuel Cells

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