Safe gel polymer electrolytes for high voltage Li-batteries

Poiana, Ruggero; Lufrano, Ernestino; Tsurumaki, Akiko; Simari, Cataldo; Nicotera, Isabella; Navarra, Maria Assunta

doi:10.1016/j.electacta.2021.139470

Cited by 23 publications

(30 citation statements)

References 32 publications

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“…The main direction of investigations is lithium cation surroundings, local and macroscopic mobilities of Li + and F − -containing fragments, and electrolyte composition-ion transport correlations. Modern and complicated NMR techniques are employed, especially solid-state high resolution magic angle spinning (MAS) NMR, pulsed-field gradient NMR, and NMR spin relaxation [13,29,[32][33][34]37,39,40,42,47,[49][50][51][52][53][54][56][57][58][59][60][61]65,72,73,76,77,80,92,.…”

Section: Nmr Study Of Polymer Electrolytesmentioning

confidence: 99%

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Polymer Electrolytes for Lithium-Ion Batteries Studied by NMR Techniques

et al. 2022

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This review is devoted to different types of novel polymer electrolytes for lithium power sources developed during the last decade. In the first part, the compositions and conductivity of various polymer electrolytes are considered. The second part contains NMR applications to the ion transport mechanism. Polymer electrolytes prevail over liquid electrolytes because of their exploitation safety and wider working temperature ranges. The gel electrolytes are mainly attractive. The systems based on polyethylene oxide, poly(vinylidene fluoride-co-hexafluoropropylene), poly(ethylene glycol) diacrylate, etc., modified by nanoparticle (TiO2, SiO2, etc.) additives and ionic liquids are considered in detail. NMR techniques such as high-resolution NMR, solid-state NMR, magic angle spinning (MAS) NMR, NMR relaxation, and pulsed-field gradient NMR applications are discussed. 1H, 7Li, and 19F NMR methods applied to polymer electrolytes are considered. Primary attention is given to the revelation of the ion transport mechanism. A nanochannel structure, compositions of ion complexes, and mobilities of cations and anions studied by NMR, quantum-chemical, and ionic conductivity methods are discussed.

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Section: Nmr Study Of Polymer Electrolytesmentioning

confidence: 99%

“…The results of the NMR study of gel electrolytes are given in [39,40,47,49,50,53,54,56,57,80,119,122,[124][125][126]130].…”

Section: Nmr In Polymer Gel Electrolytesmentioning

confidence: 99%

Polymer Electrolytes for Lithium-Ion Batteries Studied by NMR Techniques

et al. 2022

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“…[5][6][7] However, the lithium resource reserves are not abundant, limiting its future development of energy storage, gradually switching attention to Mg-ion batteries. [8][9][10] Mg-ion batteries have the advantages of low cost, high capacity, high safety, and abundant reserves. However, the divalent Mg 2+ is easily polarized due to the small ionic radius and large charge density.…”

Section: Introductionmentioning

confidence: 99%

NiS₂ nanoparticles by the NaCl-assisted less-liquid reaction system for the magnesium-ion battery cathode

et al. 2023

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“…[4] As well known, the comprehension of dynamics of mobile species in the electrolytes is usually investigated by coupling Electrochemical Impedance Spectroscopy (EIS) to measure the ionic conductivity and Nuclear Magnetic Resonance (NMR) Spectroscopy to study the ionic mobility under the influence of interactions with the surrounding molecules. [5][6][7][8][9] Pulsed Field Gradient NMR (PFG-NMR) allows the direct measurements of self-diffusion coefficients of both anion and cation, which are useful to calculate the Li + transference number, but only under the assumption of the Nernst-Einstein equation validity, which is not ever fulfilled due to ion pair association phenomena or concentration conditions far from ideality. [4,7,9,10] Basically, the results of such spectroscopic studies have revealed that the gel microstructure and morphology significantly affect the mechanism of ion dynamics.…”

Section: Introductionmentioning

confidence: 99%

“…[5][6][7][8][9] Pulsed Field Gradient NMR (PFG-NMR) allows the direct measurements of self-diffusion coefficients of both anion and cation, which are useful to calculate the Li + transference number, but only under the assumption of the Nernst-Einstein equation validity, which is not ever fulfilled due to ion pair association phenomena or concentration conditions far from ideality. [4,7,9,10] Basically, the results of such spectroscopic studies have revealed that the gel microstructure and morphology significantly affect the mechanism of ion dynamics. Specifically, longitudinal relaxation rates, T 1 obtained by 7 Li solid state NMR proved that in case of physical gels, the ions move in the liquid or liquid-phases, eventually affected by liquid/network interactions whose level depends on the chemical nature of the polymer and on the weight ratio between liquid electrolyte and polymer.…”

Section: Introductionmentioning

confidence: 99%