PEM fuel cells of poly(2,5-benzimidazole) ABPBI membrane electrolytes doped with phosphoric acid and metal phosphates

Chiang, Yi-Cheng; Tsai, Dah–Shyang; Liu, Yen-Heng; Chiang, Chun-Wei

doi:10.1016/j.matchemphys.2018.06.035

Cited by 18 publications

(6 citation statements)

References 34 publications

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“…Compared with recent studies (Figure d, Table ), − the porous membrane (3:10 W-0.01KH560) exhibits superior peak power density and OCVs among the HTPEMs.…”

Section: Resultsmentioning

confidence: 49%

Constructing Proton Transfer Channels Using CuO Nanowires and Nanoparticles as Porogens in High-Temperature Proton Exchange Membranes

Wei

Liang

Wang

et al. 2022

ACS Appl. Energy Mater.

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Constructing proton-transfer channels is considered as an efficient method to improve the performance of cross-linked phosphoric acid (PA)-doped polybenzimidazoles’ membranes. In this study, copper(II) oxide nanowires and nanoparticles are used for the first time as porogens to construct different proton-transfer channels in a high-temperature membrane. Membranes with different porous structures are successfully prepared. The results indicate that the successful construction of continuous porous proton-transfer channel makes positive contributions to improve the performances of a membrane fuel cell. Among them, a continuous proton-transfer channel (continuous pore structure) can be constructed at a lower porogen content using nanowires (which is indicated in the change of conductivity at the ratio of 3:10). Using nanowires also can enable constructing a more effective proton-transfer channel at the same porogen content (at the ratio of 5:10) than using nanoparticles. However, the increase of porogen content is not conducive to the stability of PA retention. The KH560 cross-linked membrane (3:10W-0.01KH560) achieves excellent comprehensive performances. The results indicate that the membranes prepared using nanowires are promising for actual use in high-temperature proton exchange membrane fuel cells.

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“…Compared with recent studies (Figure d, Table ), − the porous membrane (3:10 W-0.01KH560) exhibits superior peak power density and OCVs among the HTPEMs.…”

Section: Resultsmentioning

confidence: 49%

Constructing Proton Transfer Channels Using CuO Nanowires and Nanoparticles as Porogens in High-Temperature Proton Exchange Membranes

Wei

Liang

Wang

et al. 2022

ACS Appl. Energy Mater.

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“…One of the major drawbacks of PBI- and ABPBI-based HTPEMs is the inherent trade-off between proton conductivity and mechanical integrity vis-à-vis PA doping. Comparative analysis of the mechanical property results of the 10% α-ZrP-loaded sample (doped and undoped) with literature reports (Table S1) ,,,,,− suggests that α-ZrP reinforcement can overcome the aforementioned limitation.…”

Section: Resultsmentioning

confidence: 61%

α-ZrP Nanoreinforcement Overcomes the Trade-Off between Phosphoric Acid Dopability and Thermomechanical Properties: Nanocomposite HTPEM with Stable Fuel Cell Performance

Rao

Hande

Sawant

et al. 2019

ACS Appl. Mater. Interfaces

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In recent times, high-temperature polymer electrolyte membranes (HTPEMs) have emerged as viable alternatives to the Nafion-based low-temperature-operated polymer electrolyte membrane fuel cells. This is owing to their higher tolerance to fuel impurities, efficient water management, and higher cathode kinetics. However, the most efficacious HTPEMs such as poly(benzimidazole) (PBI) or 2,5-poly(benzimidazole) (ABPBI), which rely on the extent of phosphoric acid (PA) doping level for fuel cell performance, suffer from poor mechanical properties at higher acid doping levels and dopant leaching during continuous operation. To overcome these issues, we report the synthesis of ABPBI membranes and fabrication of ABPBI−zirconium pyrophosphate (α-ZrP)-based nanocomposite membranes by an ex situ methodology using methane sulfonic acid as the solvent. The incorporation of hydrophilic α-ZrP into the membrane resulted in higher dopability of PA (6.5 mol) and proton conductivity (46 mS/cm) of the membranes (10 wt % of α-ZrP) as against the corresponding values of 3.6 mol and 27 mS/cm, respectively, for the pristine membrane. More remarkably, these property improvements could be achieved while simultaneously augmenting the thermomechanical properties and oxidative stability of the membranes. The unit-cell tests showed a marked improvement in the maximum power density for the nanocomposite membrane (335 mW/cm 2 at 10 wt % α-ZrP content) over the pristine ABPBI membrane (200 mW/cm 2 ). We also report for the first time the feasibility of a 100 W HTPEM fuel cell (HTPEMFC) stack operated with the nanocomposite membrane with an active area of 39 cm 2 . The HTPEMFC stack delivered a stable voltage and power output, with a voltage drop rate of 0.84 μV/h over a run time of 730 h.

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“…This journal is © The Royal Society of Chemistry 2024 previous studies. 13,18,19,[38][39][40][41][42][43][44][45][46][47][48][49][50][51][52][53][54] Compared with PA-doped membranes reported in the literature, the C-Im-100/PA membrane exhibited excellent fuel cell performance in the absence of backpressure. For example, the PA-doped PTAP membranes prepared by Yang et al achieved a peak power density of 743 mW cm −2 at 180 °C.…”

Section: Fuel Cell Performancementioning

confidence: 99%

One-pot preparation of crosslinked network membranes via knitting strategy for application in high-temperature proton-exchange membrane fuel cells

Huang,

Wang,

Wang

et al. 2024

J. Mater. Chem. A

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PEM fuel cells of poly(2,5-benzimidazole) ABPBI membrane electrolytes doped with phosphoric acid and metal phosphates

Cited by 18 publications

References 34 publications

Constructing Proton Transfer Channels Using CuO Nanowires and Nanoparticles as Porogens in High-Temperature Proton Exchange Membranes

Constructing Proton Transfer Channels Using CuO Nanowires and Nanoparticles as Porogens in High-Temperature Proton Exchange Membranes

α-ZrP Nanoreinforcement Overcomes the Trade-Off between Phosphoric Acid Dopability and Thermomechanical Properties: Nanocomposite HTPEM with Stable Fuel Cell Performance

One-pot preparation of crosslinked network membranes via knitting strategy for application in high-temperature proton-exchange membrane fuel cells

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