Polymer Electrolytes for LIBs Based on Perfluorinated Sulfocationic Nepem-117 Membrane and Aprotic Solvents

Voropaeva, Daria; Новикова, С. А.; Xu, Tongwen; Yaroslavtsev, A. B.

doi:10.1021/acs.jpcb.9b08555

Cited by 18 publications

(2 citation statements)

References 42 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…(ii) Alternative solvent recovery or the substitution of the solvent: The quest for substituting NMP as a prevalent solvent is marked by the exploration of several viable alternatives, such as N-Butyl pyrrolidinone [120], Dimethylformamide and Dimethyl sulfoxide [121,122], Diethylamide and Ethyl Lactate [123], Dimethyl isosorbide, and Polar Clean [124]. NMP can be recovered as a liquid rather than gas using suitable washing agents such as acetone or ethanol.…”

Section: Progression Phases and Selective Approaches To Electrode Fab...mentioning

confidence: 99%

Engineering Dry Electrode Manufacturing for Sustainable Lithium-Ion Batteries

Bouguern,

Madikere Raghunatha Reddy,

et al. 2024

Batteries

View full text Add to dashboard Cite

The pursuit of industrializing lithium-ion batteries (LIBs) with exceptional energy density and top-tier safety features presents a substantial growth opportunity. The demand for energy storage is steadily rising, driven primarily by the growth in electric vehicles and the need for stationary energy storage systems. However, the manufacturing process of LIBs, which is crucial for these applications, still faces significant challenges in terms of both financial and environmental impacts. Our review paper comprehensively examines the dry battery electrode technology used in LIBs, which implies the use of no solvents to produce dry electrodes or coatings. In contrast, the conventional wet electrode technique includes processes for solvent recovery/drying and the mixing of solvents like N-methyl pyrrolidine (NMP). Methods that use dry films bypass the need for solvent blending and solvent evaporation processes. The advantages of dry processes include a shorter production time, reduced energy consumption, and lower equipment investment. This is because no solvent mixing or drying is required, making the production process much faster and, thus, decreasing the price. This review explores three solvent-free dry film techniques, such as extrusion, binder fibrillation, and dry spraying deposition, applied to LIB electrode coatings. Emphasizing cost-effective large-scale production, the critical methods identified are hot melting, extrusion, and binder fibrillation. This review provides a comprehensive examination of the solvent-free dry-film-making methods, detailing the underlying principles, procedures, and relevant parameters.

show abstract

Section: Progression Phases and Selective Approaches To Electrode Fab...mentioning

confidence: 99%

Engineering Dry Electrode Manufacturing for Sustainable Lithium-Ion Batteries

Bouguern,

Madikere Raghunatha Reddy,

et al. 2024

Batteries

View full text Add to dashboard Cite

show abstract

“…The material MF-4SK (Plastpolymer, St. Petersburg, Russia) in protic and potassium formed when modified with membrane foil (Mega, Czech Republic) and phosphate-modified zirconium dioxide [105] demonstrated a strong increase in conductivity and selectivity. Recently created [106] polymer membranes (Nepem-117) in Li+ form, when saturated with polar aprotic solvents (dimethylformamide, dimethyl sulfoxide, dimethylacetamide, and mixtures of solvents), showed an increase in ion mobility as the degree of membrane solvation increased (NMR data), which exceeded the characteristics of Nafion ® membranes with aprotic solvents [106].…”

Section: Micellar Models For Membranesmentioning

confidence: 99%

Electrochemical Properties and Structure of Membranes from Perfluorinated Copolymers Modified with Nanodiamonds

Lebedev,

Kulvelis,

Shvidchenko

et al. 2023

Membranes

View full text Add to dashboard Cite

In this study, we aimed to design and research proton-conducting membranes based on Aquivion®-type material that had been modified with detonation nanodiamonds (particle size 4–5 nm, 0.25–5.0 wt. %). These nanodiamonds carried different functional groups (H, OH, COOH, F) that provided the hydrophilicity of the diamond surface with positive or negative potential, or that strengthened the hydrophobicity of the diamonds. These variations in diamond properties allowed us to find ways to improve the composite structure so as to achieve better ion conductivity. For this purpose, we prepared three series of membrane films by first casting solutions of perfluorinated Aquivion®-type copolymers with short side chains mixed with diamonds dispersed on solid substrates. Then, we removed the solvent and the membranes were structurally stabilized during thermal treatment and transformed into their final form with –SO3H ionic groups. We found that the diamonds with a hydrogen-saturated surface, with a positive charge in aqueous media, contributed to the increase in proton conductivity of membranes to a greater rate. Meanwhile, a more developed conducting diamond-copolymer interface was formed due to electrostatic attraction to the sulfonic acid groups of the copolymer than in the case of diamonds grafted with negatively charged carboxyls, similar to sulfonic groups of the copolymer. The modification of membranes with fluorinated diamonds led to a 5-fold decrease in the conductivity of the composite, even when only a fraction of diamonds of 1 wt. % were used, which was explained by the disruption in the connectivity of ion channels during the interaction of such diamonds mainly with fluorocarbon chains of the copolymer. We discussed the specifics of the mechanism of conductivity in composites with various diamonds in connection with structural data obtained in neutron scattering experiments on dry membranes, as well as ideas about the formation of cylindrical micelles with central ion channels and shells composed of hydrophobic copolymer chains. Finally, the characteristics of the network of ion channels in the composites were found depending on the type and amount of introduced diamonds, and correlations between the structure and conductivity of the membranes were established.

show abstract