New polymer electrolyte membrane for medium-temperature fuel cell applications based on cross-linked polyimide Matrimid and hydrophobic protic ionic liquid

Rogalsky, Sergiy; Bardeau, Jean‐François; Makhno, S. M.; Tarasyuk, Oksana; Babkina, N. V.; Cherniavska, Tetiana; Filonenko, M.; Fatyeyeva, Kateryna

doi:10.1016/j.mtchem.2021.100453

Cited by 15 publications

(19 citation statements)

References 52 publications

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“…At the same time, the PI/TEA‐TFSI composite membrane showed E′ values close to neat PI in the temperature range of 25–100°C (Figure 3a). The similar effect was observed for dense PI based membranes containing PIL 43 . Based on these data one can assume that partial penetration of the ionic liquid may occur from the pores into the volume of the PI matrix at elevated temperatures.…”

Section: Resultssupporting

confidence: 76%

“…Porous polyimide Matrimid® has storage modulus ( E′ ) of 600 MPa at room temperature which steadily decreased to 300 MPa at 200°C (Figure 3a, curve 1). Thus, despite significantly reduced stiffness of the porous PI films compared to dense films, 43 they still have good elastic properties for use as a polymer matrix for PEM 44 . An impregnation of the PI matrix with TEA‐TFSI leads to a noticeable reduction of temperature at which the drop in storage modulus begins (Figure 3a, curve 2).…”

Section: Resultsmentioning

confidence: 99%

“…The similar effect was observed for dense PI based membranes containing PIL. 43 Based on these data one can assume that partial penetration of the ionic liquid may occur from the pores into the volume of the PI matrix at elevated temperatures. Reducing the temperature at which the storage modulus drops is probably caused by the plasticizing F I G U R E 2 IR spectra: TEA-TFSI (1), PI (2), PI/TEA-TFSI (3), PI/Jeffamine/TEA-TFSI (4), PI after treatment with Jeffamine in methanol (5).…”

Section: Mechanical and Thermal Analysismentioning

confidence: 99%

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Fabrication of new proton conducting membrane for fuel cell applications based on porous polyimide Matrimid® and hydrophobic protic ionic liquid

Rogalsky

Tarasyuk

Babkina

et al. 2023

J of Applied Polymer Sci

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A new proton conducting membrane has been developed by impregnation of porous polyimide Matrimid® (PI) with hydrophobic protic ionic liquid triethylammonium bis(trifluoromethylsulfonyl)imide (TEA‐TFSI). According to the results of dynamic mechanical analysis (DMA), PI/TEA‐TFSI membrane has satisfactory viscoelastic properties in the temperature range 25–100°C. However, the sharp drop in storage modulus (E') occurs at higher temperatures that is probably caused by the plasticizing effect of ionic liquid. To improve the mechanical properties of PI matrix, it was impregnated with the solution of polyetheramine Jeffamine® D‐400 in the TEA‐TFSI. This approach allowed to obtain a partially cross‐linked PI which is more resistant to deformation at elevated temperatures. Thus, DMA study revealed a storage modulus around 400 MPa for PI/Jeffamine/TEA‐TFSI membrane up to 150°C, like neat porous Matrimid®. Thermogravimetric analysis results indicate high thermal stability of PI/Jeffamine/TEA‐TFSI composite with thermal degradation point of 343°C. The ionic conductivity of the composite membrane is 4·10−3 S/cm at room temperature and reaches the level of 10−2 S/cm above 100°C. Overall, the results of this study indicate that partially cross‐linked porous PI impregnated with hydrophobic protic ionic liquid is a promising polymer electrolyte membrane for fuel cells operating at elevated temperatures in water‐free conditions.

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Section: Resultssupporting

confidence: 76%

Section: Resultsmentioning

confidence: 99%

Section: Mechanical and Thermal Analysismentioning

confidence: 99%

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Fabrication of new proton conducting membrane for fuel cell applications based on porous polyimide Matrimid® and hydrophobic protic ionic liquid

Rogalsky

Tarasyuk

Babkina

et al. 2023

J of Applied Polymer Sci

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“…In the last years, the use of ILs as llers in polymer-based membranes has been deeply studied in membrane separation processes, 23 supramolecular chemistry, 24,25 transport agents, 26 drug sensing 27 and fuel cell technology. 28 The role of ILs as plasticizers and structuring agent in the preparing of polymeric membranes with improved proton conductivity have been also studied. Regarding PBI-based membranes, Hooshyari et al synthetized PBI composite membranes doped with dicationic ionic liquid 1,6-di (3methylimidazolium) hexane bis(hexauorophosphate) (PDC 6 ), 29 with conductivities 0.078 S cm À1 at 180 C aer doping with phosphoric acid.…”

Section: Introductionmentioning

confidence: 99%

Diffusivity and free anion concentration of ionic liquid composite polybenzimidazole membranes

et al. 2021

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“…It is used in biomedicine [ 3 , 4 ], microfluidics [ 5 , 6 , 7 ], MEMS [ 8 ], triboelectricity [ 9 ] and piezoelectrics [ 10 ]. Motivation to explore the structure and dynamics of ionic PDMS [ 11 , 12 , 13 , 14 , 15 , 16 , 17 , 18 , 19 , 20 , 21 , 22 , 23 , 24 ] or other melts [ 25 , 26 , 27 , 28 , 29 , 30 , 31 , 32 , 33 , 34 , 35 , 36 , 37 , 38 ], is very high since ionic interactions inherit polymers with a functionality that leads to a high performance and applications as gas-separating membranes [ 15 ], water purification membranes [ 13 , 14 , 16 ], energy storage devices [ 39 , 40 ] as well as in sensing [ 22 , 23 ], actuation [ 21 ], fuel cells [ 41 ], and others [ 18 , 19 , 24 , 42 ].…”

Section: Introductionmentioning

confidence: 99%

Structure and Diffusion of Ionic PDMS Melts

2022

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Ionic polymers exhibit mechanical properties that can be widely tuned upon selectively charging them. However, the correlated structural and dynamical properties underlying the microscopic mechanism remain largely unexplored. Here, we investigate, for the first time, the structure and diffusion of randomly and end-functionalized ionic poly(dimethylsiloxane) (PDMS) melts with negatively charged bromide counterions, by means of atomistic molecular dynamics using a united atom model. In particular, we find that the density of the ionic PDMS melts exceeds the one of their neutral counterpart and increases as the charge density increases. The counterions are condensed to the cationic part of end-functionalized cationic PDMS chains, especially for the higher molecular weights, leading to a slow diffusion inside the melt; the counterions are also correlated more strongly to each other for the end-functionalized PDMS. Temperature has a weak effect on the counterion structure and leads to an Arrhenius type of behavior for the counterion diffusion coefficient. In addition, the charge density of PDMS chains enhances the diffusion of counterions especially at higher temperatures, but hinders PDMS chain dynamics. Neutral PDMS chains are shown to exhibit faster dynamics (diffusion) than ionic PDMS chains. These findings contribute to the theoretical description of the correlations between structure and dynamical properties of ion-containing polymers.

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New polymer electrolyte membrane for medium-temperature fuel cell applications based on cross-linked polyimide Matrimid and hydrophobic protic ionic liquid

Cited by 15 publications

References 52 publications

Fabrication of new proton conducting membrane for fuel cell applications based on porous polyimide Matrimid® and hydrophobic protic ionic liquid

Fabrication of new proton conducting membrane for fuel cell applications based on porous polyimide Matrimid® and hydrophobic protic ionic liquid

Diffusivity and free anion concentration of ionic liquid composite polybenzimidazole membranes

Structure and Diffusion of Ionic PDMS Melts

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