Ionic association analysis of LiTDI, LiFSI and LiPF<sub>6</sub>in EC/DMC for better Li-ion battery performances

Berhaut, Christopher L.; Lemordant, Daniel; Porion, Patrice; Timperman, Laure; Schmidt, Gudrun; Anouti, Mérièm

doi:10.1039/c8ra08430k

Cited by 76 publications

(61 citation statements)

References 35 publications

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“…[25] By plotting the natural logarithm of the ionic conductivities along the reciprocal temperatures (1000/T) ( Figure S1b, Supporting Information), one can immediately conclude that BS-0, BS-64, and BS-100 can be characterized by a definite Arrhenius behavior. [26] Figure S1b, Supporting Information, shows the linear relationship between ln σ and 1000/T (K −1 ) (R 2 ≈ 0.99), indicating that these experimental results can be perfectly fitted via the Arrhenius equation over the temperature range investigated. As demonstrated by the results in Table S3, Supporting Information, the BS-0 electrolyte had a high activation energy (35.5 kJ mol −1 ).…”

Section: Superior Physical and Chemical Properties Of Bisalt Electrolmentioning

confidence: 63%

Synergistic Effects on Lithium Metal Batteries by Preferential Ionic Interactions in Concentrated Bisalt Electrolytes

Pham

Faheem

Chun

et al. 2021

Advanced Energy Materials

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Lithium metal batteries (LMBs) have the potential to deliver a greater specific capacity than any commercially used lithium battery. However, excessive dendrite growth and low Coulombic efficiencies (CEs) are major hurdles preventing the commercialization of LMBs. In this study, two different salts, lithium difluorophosphate (LiDFP) and lithium bis(trifluoromethanesulfonyl)imide (LiTFSI), are chosen for use in concentrated electrolytic systems. By mixing salts with vastly different cation–anion interaction energies, the ion solvation structures in the electrolyte can be modulated to enhance the physical/electrochemical properties and suppress Li dendrite growth in LMBs. Among the investigated electrolyte systems, 2.2 m LiDFP + 1.23 m LiTFSI in 1,2‐dimethoxyethane is proposed as a highly promising electrolyte system because of its high conductivity (6.57 mS cm−1), CE (98.3%), and the formation of an extremely stable solid–electrolyte interface layer. The bisalt electrolyte presented herein, as well as the associated concepts, provide a new avenue toward commercial LMBs.

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Section: Superior Physical and Chemical Properties Of Bisalt Electrolmentioning

confidence: 63%

Synergistic Effects on Lithium Metal Batteries by Preferential Ionic Interactions in Concentrated Bisalt Electrolytes

Pham

Faheem

Chun

et al. 2021

Advanced Energy Materials

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“…solid polymer electrolytes . This is due to the fact that for less polar solvents, the balance of entropy and enthalpy determines the behaviour, while for polar solvents the enthalpy part dominates …”

Section: Resultsmentioning

confidence: 99%

Interactions and Transport in Highly Concentrated LiTFSI‐based Electrolytes

et al. 2020

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To elucidate what properties control and practically limit ion transport in highly concentrated electrolytes (HCEs), the viscosity, ionic conductivity, ionicity, and transport numbers were studied for nine model electrolytes and connected to the rate capability in Li‐ion battery (LIB) cells. The electrolytes employed the LiTFSI salt in three molar ratio concentrations; 1 : 2, 1 : 4, and 1 : 16 (LiTFSI:X) vs. solvents (X) with different permittivities; tert‐butyl methyl ether (MTBE), tetrahydrofuran (THF) and propylene carbonate (PC). While the low polarity MTBE creates liquid electrolytes, ion‐pairing limits the ionic conductivity despite extremely low viscosities. For the less concentrated 1 : 16 LiTFSI:MTBE and 1 : 16 LiTFSI:THF electrolytes the ionic diffusivities decrease with increased temperature, a sign of aggregation, but still their ionic conductivities and LIB performance increase. In general, the low ionic conductivity and high viscosity both limit the use of HCEs in LIBs, and no compensating mechanism seems to be present.

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“…Measurements were made at 90 at different temperatures (15-65 C), and sample solutions were ltered using 0.2 mm pore size lters for light scattering measurements. The hydrodynamic radius (R h ) was measured based on the diffusion coefficient (D) by using the Stoke-Einstein eqn (2): 25,33,34…”

Section: Static and Dynamic Light Scatteringmentioning

confidence: 99%

Interaction of synthetic and lignin-based sulfonated polymers with hydrophilic, hydrophobic, and charged self-assembled monolayers

Kazzaz

Fatehi

2020

RSC Adv.

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Ionic association analysis of LiTDI, LiFSI and LiPF₆in EC/DMC for better Li-ion battery performances

Abstract: Insight is given on the type of ion-pairs that could be formed in EC/DMC by Li-salts LiTDI, LiFSI and LiPF6.

Cited by 76 publications

References 35 publications

Synergistic Effects on Lithium Metal Batteries by Preferential Ionic Interactions in Concentrated Bisalt Electrolytes

Synergistic Effects on Lithium Metal Batteries by Preferential Ionic Interactions in Concentrated Bisalt Electrolytes

Interactions and Transport in Highly Concentrated LiTFSI‐based Electrolytes

Interaction of synthetic and lignin-based sulfonated polymers with hydrophilic, hydrophobic, and charged self-assembled monolayers

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Ionic association analysis of LiTDI, LiFSI and LiPF6in EC/DMC for better Li-ion battery performances

Abstract: Insight is given on the type of ion-pairs that could be formed in EC/DMC by Li-salts LiTDI, LiFSI and LiPF6.

Cited by 76 publications

References 35 publications

Synergistic Effects on Lithium Metal Batteries by Preferential Ionic Interactions in Concentrated Bisalt Electrolytes

Synergistic Effects on Lithium Metal Batteries by Preferential Ionic Interactions in Concentrated Bisalt Electrolytes

Interactions and Transport in Highly Concentrated LiTFSI‐based Electrolytes

Interaction of synthetic and lignin-based sulfonated polymers with hydrophilic, hydrophobic, and charged self-assembled monolayers

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Product

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Ionic association analysis of LiTDI, LiFSI and LiPF₆in EC/DMC for better Li-ion battery performances