Recent progress in NMR spectroscopy of polymer electrolytes for lithium batteries

Abbrent, Sabina; Greenbaum, Steve

doi:10.1016/j.cocis.2013.03.008

Cited by 36 publications

(41 citation statements)

References 67 publications

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“…In Equation (8), t + is the transference number of cations. D + and D − stand for the cation and anion self-diffusion coefficients, μ + and μ − are the mobility [ 120 , 121 ] of the cation and anion, respectively.…”

Section: Nanoparticle Additives Affect the Polymer Electrolyte Strmentioning

confidence: 99%

Composite Polymer Electrolytes: Nanoparticles Affect Structure and Properties

2016

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Abstract:Composite polymer electrolytes (CPEs) can significantly improve the performance in electrochemical devices such as lithium-ion batteries. This review summarizes property/performance relationships in the case where nanoparticles are introduced to polymer electrolytes. It is the aim of this review to provide a knowledge network that elucidates the role of nano-additives in the CPEs. Central to the discussion is the impact on the CPE performance of properties such as crystalline/amorphous structure, dielectric behavior, and interactions within the CPE. The amorphous domains of semi-crystalline polymer facilitate the ion transport, while an enhanced mobility of polymer chains contributes to high ionic conductivity. Dielectric properties reflect the relaxation behavior of polymer chains as an important factor in ion conduction. Further, the dielectric constant (ε) determines the capability of the polymer to dissolve salt. The atom/ion/nanoparticle interactions within CPEs suggest ways to enhance the CPE conductivity by generating more free lithium ions. Certain properties can be improved simultaneously by nanoparticle addition in order to optimize the overall performance of the electrolyte. The effects of nano-additives on thermal and mechanical properties of CPEs are also presented in order to evaluate the electrolyte competence for lithium-ion battery applications.

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Section: Nanoparticle Additives Affect the Polymer Electrolyte Strmentioning

confidence: 99%

Composite Polymer Electrolytes: Nanoparticles Affect Structure and Properties

2016

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“…[4,5] Ex situ 7 Li/ 6 Li NMR is a routine and powerful tool to obtain the quantitative information of different environmental Li species from electrolyte to electrode in Li batteries. [18][19][20] In situ 7 Li NMR technique has been nicely established to probe real-time, dynamic, and quantitative information of Li batteries under their working conditions. [21][22][23] For example, Li intercalation and de-intercalation processes in graphite electrode were monitored by in situ 7 Li NMR with quantitative information on both the Li-graphite intercalation products and the deposited Li-dendrite obtained.…”

Section: Introductionmentioning

confidence: 99%

In situ 7Li and 133Cs nuclear magnetic resonance investigations on the role of Cs+ additive in lithium-metal deposition process

Zhao

et al. 2016

Journal of Power Sources

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Cesium ion (Cs +) has been reported to be an effective electrolyte additive to suppress Li dendrite growth which prevents the application of lithium (Li) metal as an anode for rechargeable Li batteries. In this work, we investigated the effect of Cs + additive on Li depositions using quantitative in situ 7 Li and 133 Cs nuclear magnetic resonance (NMR) with planar symmetric Li cells. It's found that the addition of Cs + can significantly enhance both the formation of well aligned Li nanorods and reversibility of the Li electrode. In situ 133 Cs NMR directly confirms that Cs + migrates to Li electrode to form a positively charged electrostatic shield during the charging process. Much more electrochemical "active" Li was found in Li films deposited with Cs + additive, while more electrochemical "dead" and thicker Li rods were identified in Li films deposited without Cs +. Combining the in situ and the previous ex-situ results, a Li deposition model has been proposed to explain these observations.

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“…Both naturally occurring lithium isotopes, 6 Li and 7 Li, can be observed using NMR, but 7 Li is chosen most commonly due to its higher natural abundance and NMR sensitivity. 13 Several researchers have used NMR to study these polymer electrolytes. 13−17 In these studies, the NMR peak corresponding to lithium appears as a single line.…”

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Detection of the Order-to-Disorder Transition in Block Copolymer Electrolytes Using Quadrupolar ⁷Li NMR Splitting

Grundy¹,

Sethi²,

Galluzzo³

et al. 2019

ACS Macro Lett.

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The order-to-disorder transition temperature (T ODT) in a series of mixtures of polystyrene-b-poly(ethylene oxide) (SEO) and lithium bis(trifluoromethanesulfonyl)imide (LiTFSI) salt is identified by the disappearance of a quadrupolar 7 Li NMR triplet peak splitting above a critical temperature, where a singlet is observed. The macroscopic alignment of ordered domains required to produce a quadrupolar splitting occurs due to exposure to the NMR magnetic field. Alignment is confirmed using small-angle X-ray scattering (SAXS). The T ODT determined by NMR is consistent with that determined using SAXS.

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Recent progress in NMR spectroscopy of polymer electrolytes for lithium batteries

Cited by 36 publications

References 67 publications

Composite Polymer Electrolytes: Nanoparticles Affect Structure and Properties

Composite Polymer Electrolytes: Nanoparticles Affect Structure and Properties

In situ 7Li and 133Cs nuclear magnetic resonance investigations on the role of Cs+ additive in lithium-metal deposition process

Detection of the Order-to-Disorder Transition in Block Copolymer Electrolytes Using Quadrupolar ⁷Li NMR Splitting

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Recent progress in NMR spectroscopy of polymer electrolytes for lithium batteries

Cited by 36 publications

References 67 publications

Composite Polymer Electrolytes: Nanoparticles Affect Structure and Properties

Composite Polymer Electrolytes: Nanoparticles Affect Structure and Properties

In situ 7Li and 133Cs nuclear magnetic resonance investigations on the role of Cs+ additive in lithium-metal deposition process

Detection of the Order-to-Disorder Transition in Block Copolymer Electrolytes Using Quadrupolar 7Li NMR Splitting

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Detection of the Order-to-Disorder Transition in Block Copolymer Electrolytes Using Quadrupolar ⁷Li NMR Splitting