Salt and Solvent effect on physicochemical properties and species organisation of Lithium fluorosulfonyl imide (FSI and TFSI) based electrolytes for Li-ion battery: Consequence on cyclability of LiNi0.8Co0.15Al0.05 (NCA) cathode

Chidiac, Joseph; Timperman, Laure; Anouti, Mérièm

doi:10.1016/j.jtice.2021.06.049

Cited by 6 publications

(5 citation statements)

References 71 publications

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“…In the case of the ternary solvent mixture (EC/PC/3DMC), there was a difference of 18 % between the values of the average viscosity activation energies,

E_{a}^{η} = (14.5 \pm 0.8) k J {m o l}^{- 1}

and that of the conductivity

E_{a}^{σ} = (12.0 \pm 0.7) k J {m o l}^{- 1}

. These values are of the same level as the values of the activation energies found in the ternary mixture for LiTFSI and LiFSI [51] . The activation energy is therefore linked both to the solvent but also to the symmetry of the anion.…”

Section: Resultssupporting

confidence: 69%

“…For the 3 systems based on the binary mixture (3EC/7EMC), the average activation energies of the viscosity and of the conductivity were similar i. e.,

E_{a} = (13.5 \pm 0.8) k J {m o l}^{- 1}

. This value is significantly lower than that of LiTFSI and LiFSI (

E_{a} = (13.5 \pm 0.8) k J {m o l}^{- 1}

) in the same solvent mixture [51] . In the case of the ternary solvent mixture (EC/PC/3DMC), there was a difference of 18 % between the values of the average viscosity activation energies,

E_{a}^{η} = (14.5 \pm 0.8) k J {m o l}^{- 1}

and that of the conductivity

E_{a}^{σ} = (12.0 \pm 0.7) k J {m o l}^{- 1}

.…”

Section: Resultscontrasting

confidence: 54%

“…In the EC/PC/3DMC based system, lithium salt had the highest viscosity over the entire temperature range, LiFTSI > NaFTFSI KFTFSI, while in the 3EC/7EMC binary mixture, the order was reversed; NaFTFSI > LiFTFSI ~KFTFSI. The viscosities observed in the ternary mixture of solvents are close to those of the alkali salts based on TFSI in EC/DMC i. e., η (LiTFSI) = 4.1 mPa s; η (NaTFSI) = 2.7 mPa s; and η (KTFSI) = 2.4 mPa s. [48] By comparing the viscosities of electrolytes based on LiFTFSI with the salts of symmetrical anions LiTFSI and LiFSI [51] in the same mixtures of solvents, it can be seen that the viscosities are in the reverse order, that is to say higher in the binary mixture than in the ternary mixture. There is therefore clearly an effect of anionic symmetry on the viscosity of the electrolytes.…”

Section: Comparative Viscosity and Conductivity As A Function Of Solv...mentioning

confidence: 74%

“…This value is significantly lower than that of LiTFSI and LiFSI ( E a ¼ ð13:5 � 0:8Þ kJmol À 1 ) in the same solvent mixture. [51] In the case of the ternary solvent mixture (EC/PC/3DMC), there was a difference of 18 % between the values of the average viscosity activation energies, E h a ¼ ð14:5 � 0:8Þ kJmol À 1 and that of the conductivity E s a ¼ ð12:0 � 0:7Þ kJmol À 1 . These values are of the same level as the values of the activation energies found in the ternary mixture for LiTFSI and LiFSI.…”

Section: Comparative Viscosity and Conductivity As A Function Of Solv...mentioning

confidence: 98%

“…These values are of the same level as the values of the activation energies found in the ternary mixture for LiTFSI and LiFSI. [51] The activation energy is therefore linked both to the solvent but also to the symmetry of the anion. According to Table 1, the addition of salt increases the activation energies in the two solvent mixtures by 30-40 % regardless of the cation of the salt added.…”

Section: Comparative Viscosity and Conductivity As A Function Of Solv...mentioning

confidence: 99%

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Role of FTFSI Anion Asymmetry on Physical Properties of AFTFSI (A=Li, Na and K) Based Electrolytes and Consequences on Supercapacitor Application

2021

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This study compares the physicochemical properties of six electrolytes comprising of three salts: LiFTFSI, NaFTFSI and KFTFSI in two solvent mixtures, the binary (3EC/7EMC) and the ternary (EC/PC/3DMC). The transport properties (conductivity, viscosity) as a function of temperature and concentration were modeled using the extended Jones-Dole-Kaminsky equation, the Arrhenius model, and the Eyring theory of transition state for activated complexes. Results are discussed in terms of ionicity, solvation shell, and cross-interactions between electrolyte components. The application of the six formulated electro-lytes in symmetrical activated carbon (AC)//AC supercapacitors (SCs) was characterized by cyclic voltammetry (CV), galvanostatic cycling with potential limitation (GCPL), electrochemical impedance spectroscopy (EIS) and accelerated aging. Results revealed that the geometrical flexibility of the FTFSI anion allows it to access and diffuse easily in AC whereas its counter ions (Li + , Na + or K + ) can remain trapped in porosity. However, this drawback was partially resolved by mixing LiFTFSI and KFTFSI salts in the electrolyte.

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“…In the case of the ternary solvent mixture (EC/PC/3DMC), there was a difference of 18 % between the values of the average viscosity activation energies,

E_{a}^{η} = (14.5 \pm 0.8) k J {m o l}^{- 1}

and that of the conductivity

E_{a}^{σ} = (12.0 \pm 0.7) k J {m o l}^{- 1}

Section: Resultssupporting

confidence: 69%

“…For the 3 systems based on the binary mixture (3EC/7EMC), the average activation energies of the viscosity and of the conductivity were similar i. e.,

E_{a} = (13.5 \pm 0.8) k J {m o l}^{- 1}

. This value is significantly lower than that of LiTFSI and LiFSI (

E_{a} = (13.5 \pm 0.8) k J {m o l}^{- 1}

) in the same solvent mixture [51] . In the case of the ternary solvent mixture (EC/PC/3DMC), there was a difference of 18 % between the values of the average viscosity activation energies,

E_{a}^{η} = (14.5 \pm 0.8) k J {m o l}^{- 1}

and that of the conductivity

E_{a}^{σ} = (12.0 \pm 0.7) k J {m o l}^{- 1}

.…”

Section: Resultscontrasting

confidence: 54%

Section: Comparative Viscosity and Conductivity As A Function Of Solv...mentioning

confidence: 74%

Section: Comparative Viscosity and Conductivity As A Function Of Solv...mentioning

confidence: 98%

Section: Comparative Viscosity and Conductivity As A Function Of Solv...mentioning

confidence: 99%

See 3 more Smart Citations

Role of FTFSI Anion Asymmetry on Physical Properties of AFTFSI (A=Li, Na and K) Based Electrolytes and Consequences on Supercapacitor Application

2021

Self Cite

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Lithium Bis(Trifluoromethanesulfonyl)Imide (LiTFSI): A Prominent Lithium Salt in Lithium‐Ion Battery Electrolytes – Fundamentals, Progress, and Future Perspectives

Li,

Wang,

Huang

et al. 2024

Adv Funct Materials

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Lithium bis(trifluoromethanesulfonyl)imide (LiTFSI) is a widely used lithium (Li) salt that is extensively studied in the field of electrolytes for Li‐ion batteries (LIBs) to improve their performance. A thorough understanding of its underlying mechanisms in LIBs is crucial for gaining deeper insights into its future development. This paper provides an extensive review of the role of LiTFSI in enhancing battery performance, including its benefits for negative electrode protection, the facilitation of fast charging capabilities, and the promotion of battery operation across a wide temperature range. It also highlights the specific drawbacks of LiTFSI in the electrolyte domain and examines potential solutions. By leveraging the unique properties of LiTFSI, the strategies for its effective utilization in current research are outlined. Finally, the paper discusses the lack of research into the mechanism of LiTFSI in interface protection, particularly the evolution mechanisms of multi‐component Li salts at the positive and negative electrode interfaces, and it reasonably anticipates the potential applications of LiTFSI in the realm of non‐liquid batteries. This study not only provides a more comprehensive and profound understanding of LiTFSI but also aids in the exploration of novel electrolyte systems.

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Effect of choline chloride based deep eutectic solvents on lithium perchlorate + propylene carbonate solutions: Thermodynamic, transport, electrochemical and computational study

Zafarani-Moattar

Shekaari

Dizaj

et al. 2021

Journal of the Taiwan Institute of Chemical Engineers

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Salt and Solvent effect on physicochemical properties and species organisation of Lithium fluorosulfonyl imide (FSI and TFSI) based electrolytes for Li-ion battery: Consequence on cyclability of LiNi0.8Co0.15Al0.05 (NCA) cathode

Cited by 6 publications

References 71 publications

Role of FTFSI Anion Asymmetry on Physical Properties of AFTFSI (A=Li, Na and K) Based Electrolytes and Consequences on Supercapacitor Application

Role of FTFSI Anion Asymmetry on Physical Properties of AFTFSI (A=Li, Na and K) Based Electrolytes and Consequences on Supercapacitor Application

Lithium Bis(Trifluoromethanesulfonyl)Imide (LiTFSI): A Prominent Lithium Salt in Lithium‐Ion Battery Electrolytes – Fundamentals, Progress, and Future Perspectives

Effect of choline chloride based deep eutectic solvents on lithium perchlorate + propylene carbonate solutions: Thermodynamic, transport, electrochemical and computational study

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