Composite proton-conducting membranes with nanodiamonds

Kulvelis, Yu. V.; Primachenko, O. N.; Odinokov, A. S.; Shvidchenko, A. V.; Bayramukov, V. Yu.; Gofman, I. V.; Лебедев, В. Т.; Ivanchev, S. S.; Vul, A. Ya.; Wu, Baohu

doi:10.1080/1536383x.2019.1680981

Cited by 11 publications

(11 citation statements)

References 25 publications

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“…A further increase in DND-S concentration in membranes leads to growth of these parameters and a decrease in ultimate deformation. The tendency of Young's modulus to rise, as well as the decrease in ε D and σ T , was also found earlier for similar membranes filled with protonated nanodiamonds [38], as well as for carboxylated nanodiamonds [34]. Parameter σ Y in the current work and in the abovementioned cases is close to constant value with some deviations, demonstrating good elastic properties of membranes when DND has little effect on their elastic properties even at a high DND content.…”

Section: Mechanical Tests Of the Membranessupporting

confidence: 89%

Improving PFSA Membranes Using Sulfonated Nanodiamonds

Shvidchenko,

Odinokov,

Primachenko

et al. 2023

Membranes

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Aquivion®-type perfluorosulfonic acid membranes with a polytetrafluoroethylene backbone and short side chains with sulfonic acid groups at the ends have great prospects for operating in hydrogen fuel cells. To improve the conducting properties of membranes, various types of nanofillers can be used. We prepared compositional Aquivion®-type membranes with embedded detonation nanodiamond particles. Nanodiamonds were chemically modified with sulfonic acid groups to increase the entire amount of ionogenic groups involved in the proton conductivity mechanism in compositional membranes. We demonstrated the rise of proton conductivity at 0.5–2 wt.% of sulfonated nanodiamonds in membranes, which was accompanied by good mechanical properties. The basic structural elements, conducting channels in membranes, were not destroyed in the presence of nanodiamonds, as follows from small-angle neutron scattering data. The prepared compositional membranes can be used in hydrogen fuel cells to achieve improved performance.

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Section: Mechanical Tests Of the Membranessupporting

confidence: 89%

Improving PFSA Membranes Using Sulfonated Nanodiamonds

Shvidchenko,

Odinokov,

Primachenko

et al. 2023

Membranes

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“…Last decade was marked by new research studies on preparation of perfluorosulfonic acid membranes modified with various new promising carbon fillers, such as functionalized nanodiamonds, carbon nanotubes, graphene oxide, etc. 126‐132 …”

Section: From the Synthesis Of Short‐side‐chain Fluorinated Ionomers mentioning

confidence: 99%

“…Composite proton conducting membranes based on our SSC Aquivion‐type copolymer modified with detonation nanodiamonds (DND) were prepared 128,129 . Diluted solutions of the copolymer in N , N ‐dimethylformamide (DMFA) containing DND dispersions were cast with the following removal of the solvent.…”

Section: From the Synthesis Of Short‐side‐chain Fluorinated Ionomers mentioning

confidence: 99%

“…A number of dispersions of SSC Aquivion copolymers in aqueous and aqueous‐alcoholic media have been developed to prepare compositions with organic and inorganic fillers. A number of works 81,82,87‐89,128‐132 report the modifications of Aquivion membranes, possible to improve both electrochemical, mechanical, and barrier properties of the membranes. The search for new promising types of fillers for SSC Aquivion composite membranes continues.…”

Section: Conclusion and Future Prospectsmentioning

confidence: 99%

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State of the art and prospects in the development of proton‐conducting perfluorinated membranes with short side chains: A review

Primachenko

Marinenko

Odinokov

et al. 2020

Polymers for Advanced Techs

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The review is devoted to key problems in the development of modern proton‐conducting membranes for hydrogen power assuming its progress for using in fuel cells working at enhanced temperatures without catalysts poisoning and providing stable high proton conductivity and improved mechanical properties. Modern trends in the synthesis approaches such as application of emulsion polymerization and novel efforts for the modification of polymer membranes by chemically stable nanoparticles, carrying protons, are discussed as compared to commercially used membrane materials such as Nafion and Aquivion. The crucial role of advanced structural methods to recognize subtle features of molecular ordering and formation of conducting channels in membranes is considered, focusing on neutron scattering as the most powerful instrument for the analysis of ionomers and other nanoscale structures by means of selective isotopic contrasting structural elements in membrane materials. The integration of novel methods of emulsion polymerization and use of nanodiamonds and other nanoparticles embedded into polymer matrices is prospective in the creation of new generations of membrane materials with higher functional properties.

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“…Proton exchange membrane fuel cells (PEMFC) are a promising clean energy conversion technology due to their high efficiency, high power density, low emissions, and fast start‐up . As a core component of PEMFC, proton exchange membranes (PEMs) should have good proton conductivity and chemical stability and mechanical stability . The Nafion membrane developed by DuPont Company exhibits good proton conductivity due to its nanophase separation, and its perfluorinated framework has good chemical and oxidative stability.…”

Section: Introductionmentioning

confidence: 99%

Enhancing proton conductivity of proton exchange membrane with SPES nanofibers containing porous organic cage

Shao

Shi

et al. 2020

Polymers for Advanced Techs

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Effective proton conducting sites and establishing proton channels are two critical factors in developing high-performance proton exchange membranes. This study first establishes a strategy in designing effective proton conducting channels for Nafion by using solution blowing of sulfonated polyethersulfone (SPES) nanofibers containing CC3, which is an emerging porous organic cage that possesses the advantages of dissolvable organic solvents and high proton conduction from its interconnected three-dimensional pore structure. Our strategy results in SPES nanofiber networks with CC3 uniformly involved in and composite membranes with Nafion-filled interfiber voids. Benefiting from such structural features, the composite membrane exhibits high proton conductivity (0.315 S cm −1 at 80 C and 100% RH), low methanol permeability (0.69 × 10 −7 cm 2 S −1 ), excellent water absorption, thermal and dimensional stability, and single-cell performance. This study provides not only a valuable reference for the application of CC3 but also a new idea for establishment of proton transfer channels. K E Y W O R D S high proton conductivity, porous organic cage CC3, proton exchange membrane, SPES nanofibers

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Composite proton-conducting membranes with nanodiamonds

Cited by 11 publications

References 25 publications

Improving PFSA Membranes Using Sulfonated Nanodiamonds

Improving PFSA Membranes Using Sulfonated Nanodiamonds

State of the art and prospects in the development of proton‐conducting perfluorinated membranes with short side chains: A review

Enhancing proton conductivity of proton exchange membrane with SPES nanofibers containing porous organic cage

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