NMR studies of ionic mobility and molecular mobility in polymer electrolytes

Solid-state Li NMR with applications to the translational dynamics in ion conductors

“…The most studied solvating polymer, (PEO), -[CH 2 CH 2 O] n -, forms complexes with most metals and in particular with lithium [414][415][416][417][418][419][420][421][422][423]. The donor number and polarizability of the ether groups in PEO give it solvating properties similar to that of water.…”

“…Because the temperature region of interest in polymer electrolytes is above T g where the NMR lines are liquid-like, these techniques are easily implemented. There have been numerous measurements of diffusion coefficients in model polymer electrolytes in the temperature region above T g [415][416][417][418]420,421,423,[441][442][443][444][445][446][447]. It is immediately obvious from these measurements that the diffusion of the anion is usually faster than that of the cation.…”

Investigation of ion-pairing phenomenon in BaF2 aqueous solution: Experimental and theoretical studies

“…Several methods of studying ion-pairing including conductivity methods [9][10][11][12][13][14][15], ion-selective electrode potentiometry [16], gravimetric, solvent evaporation [17], NMR spectroscopy [18][19][20][21][22], and theoretical modeling [23][24][25][26] have been used to probe the phenomenon of ion association in both aqueous and non-aqueous solvents. Theoretical methods like DFT assume some structures in the solution and only a correct assumption leads to a theoretical result that agrees with experimental results.…”

Ionic and molecular Self-Diffusion in Ion-Exchange materials for fuel energetics studied by pulsed field gradient NMR

“…Ionic and molecular transport mechanisms in ion-exchange systems may be understood on the basis of interconnection transport channel nanostructure, ionic and molecular state and translation mobility in different spatial scales. This information may be obtained from magnetic resonance data [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15]. Pulsed field gradient nuclear magnetic resonance (PFG NMR) became the method of choice for direct selfdiffusion coefficients measurements of solvate molecules and counterions in ionexchange systems [2][3][4][5][6][7][8][9][10][11][12][16][17][18][19].…”