Polyethylene oxide with lithium trifluoromethane sulphonate; an NMR study

Tunstall, D P; Tomlin, A S; MacCallum, J.R.; Vincent, Colin A.

doi:10.1088/0022-3719/21/6/011

Cited by 30 publications

(8 citation statements)

References 7 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…25 However, in the case of 7 Li, deviations from a single exponential behavior can hardly be observed. 35,36 In the present study, the magnetization was always found to relax following a single exponential, which implies the existence of a common spin temperature. On the other hand, spin diffusion in quadrupolar model systems was shown to make more exponential the magnetization recovery by narrowing the distribution of correlation times.…”

Section: LI Nmr: Spin-lattice Relaxationsupporting

confidence: 53%

Host–guest interactions in fluorinated polymer electrolytes: A 7Li-13C NMR study

Mustarelli

Quartarone

Capiglia

et al. 1999

The Journal of Chemical Physics

View full text Add to dashboard Cite

Correlating the NMR self-diffusion and relaxation measurements with ionic conductivity in polymer electrolytes composed of cross-linked poly(ethylene oxide-propylene oxide) doped with LiN(SO 2 CF 3 ) 2Gel-type electrolytes based on fluorinated polymers are of interest for electrochemical devices. We present a 7 Li-13 C solid-state NMR and modulated differential scanning calorimetry ͑MDSC͒ study of gel electrolytes based on a copolymer poly͑vinylidene fluoride͒ ͑PVdF͒-hexafluoropropylene ͑HFP͒ activated with a nonaqueous solution ethylene carbonate ͑EC͒-propylene carbonate ͑PC͒-LiN͑CF 3 SO 2 ͒ 2 . We show that the narrowing of the Li lineshape is decoupled from the glass transition. The behavior of the longitudinal relaxation times, T 1 , confirms that the host polymer matrix simply behaves like a quasiinert cage for the solution. These results are confirmed by 13 C NMR at the magic angle ͑MAS͒ data, which show that the presence of the polymer does not significantly affect the chemical shift changes induced in the EC/PC carbons by the imide salt.

show abstract

Section: LI Nmr: Spin-lattice Relaxationsupporting

confidence: 53%

Host–guest interactions in fluorinated polymer electrolytes: A 7Li-13C NMR study

Mustarelli

Quartarone

Capiglia

et al. 1999

The Journal of Chemical Physics

View full text Add to dashboard Cite

show abstract

“…Other important alkali metal salts could have been used to prepare these ionic conducting systems, for example: LiCF 3-SO3 or NaClO4. However, either the cation possesses a higher quadrupolar moment than 7 Li (I ) 3 /2), e.g., 23 Na (I ) 3 /2), or their anions contain high natural abundance and intense magnet moment nuclei, e.g., 19 F (I ) 1 /2). To avoid additional nuclear interactions and simplify the interpretation of the cation NMR measurements we decided to use LiClO4.…”

Section: Methodsmentioning

confidence: 99%

NMR Study of Ion-Conducting Organic−Inorganic Nanocomposites Poly(ethylene glycol)−Silica−LiClO₄

et al. 2000

View full text Add to dashboard Cite

Hybrid organic-inorganic ionic conductors, also called ormolytes, were obtained by dissolution of LiClO 4 into silica/poly(ethylene glycol) matrices. Solid-state nuclear magnetic resonance (NMR) was used to probe the inorganic phase structure ( 29 Si) and the effects of the temperature and composition on the dynamic behavior of the ionic species ( 7 Li) and the polymer chains ( 1 H and 13 C). The NMR results between -100 and +90 °C show a strong correlation with ionic conductivity and differential scanning calorimetry experiments. The results also demonstrate that the cation mobility is assisted by segmental motion of the polymer, which is in agreement with the results previously reported for pure poly(ethylene oxide), PEO, electrolytes.

show abstract

“…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.…”

Section: Fast Ion Motion In Flexible Matricesmentioning

confidence: 99%

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

Böhmer

Jeffrey

Vogel

2007

Progress in Nuclear Magnetic Resonance Spectroscopy

226

232

View full text Add to dashboard Cite

Polyethylene oxide with lithium trifluoromethane sulphonate; an NMR study

Cited by 30 publications

References 7 publications

Host–guest interactions in fluorinated polymer electrolytes: A 7Li-13C NMR study

Host–guest interactions in fluorinated polymer electrolytes: A 7Li-13C NMR study

NMR Study of Ion-Conducting Organic−Inorganic Nanocomposites Poly(ethylene glycol)−Silica−LiClO₄

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

Contact Info

Product

Resources

About

Polyethylene oxide with lithium trifluoromethane sulphonate; an NMR study

Cited by 30 publications

References 7 publications

Host–guest interactions in fluorinated polymer electrolytes: A 7Li-13C NMR study

Host–guest interactions in fluorinated polymer electrolytes: A 7Li-13C NMR study

NMR Study of Ion-Conducting Organic−Inorganic Nanocomposites Poly(ethylene glycol)−Silica−LiClO4

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

Contact Info

Product

Resources

About

NMR Study of Ion-Conducting Organic−Inorganic Nanocomposites Poly(ethylene glycol)−Silica−LiClO₄