Optimization of the lithium-ion cell electrolyte composition through the use of the LiTDI salt

Niedzicki, Leszek; Karpierz, E.; Bitner, Anna; Kasprzyk, Marta; Żukowska, G.; Marcinek, Marek; Wieczorek, W.

doi:10.1016/j.electacta.2013.11.134

Cited by 32 publications

(33 citation statements)

References 21 publications

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“…They showed that every salt and every solvent ratio has a different optimal concentration for maximum ionic conductivity. Our group previously showed that similar maxima exist for transference number [9]. We also explained this phenomenon based on studies of adequate ionic associations.…”

Section: Introductionmentioning

confidence: 66%

“…Apart from other DECbased LiTDI solutions [9], it is found in other mixtures [22]. The fact that these solutions are four-or five-component mixtures (LiTDI and at least three solvents), with every component having different properties, can explain such unusual conductivity behavior.…”

Section: Resultsmentioning

confidence: 95%

“…In contrast, DMC-based mixtures have a more standard conductivity plot shape, probably due to the relatively similar properties of DMC and EMC. Also, LiTDI is known for forming a variety of associate and solvate configurations depending on the absolute and relative concentration of solvents [9,23]. As the concentration increases, the electrolyte contains more and more ionic associates, both in terms of amount and diversity.…”

Section: Resultsmentioning

confidence: 99%

“…The other two solvent mixtures contained EC as a 0.354 (EC:DMC:EMC) and 0.371 (EC:2EMC) molar fraction. We already established EC content and solvation as the most important parameters for good electrolyte conductivity [9]. As the dielectric constant of EC exceeds that of DEC, DMC and EMC, it would be the first choice to solvate lithium cations.…”

Section: Resultsmentioning

confidence: 99%

“…The higher transference number of LiTDI is an advantage over the market-dominating salt, and is especially beneficial for highenergy applications, such as electric vehicles or grid energy storage. While LiTDI-based solutions lack as high an ionic conductivity as LiPF 6 ones, the former excel at transference number [9]. Thanks to the high lithium cation conductivity value (the transference number multiplied by ionic conductivity) of LiTDI electrolytes, the rate of ion transfer should not be compromised and should be similar to that of LiPF 6 .…”

Section: Introductionmentioning

confidence: 97%

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LiTDI and solvent mixture based electrolytes for lithium-ion cells

Niedzicki

Brzozowski

Wieczorek

2015

Electrochimica Acta

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Section: Introductionmentioning

confidence: 66%

Section: Resultsmentioning

confidence: 95%

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 97%

See 3 more Smart Citations

LiTDI and solvent mixture based electrolytes for lithium-ion cells

Niedzicki

Brzozowski

Wieczorek

2015

Electrochimica Acta

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Systematic Studies on Liquid Sodium 4,5‐dicyano‐2‐(trifluoromethyl)imidazolate (NaTDI)‐Based Electrolytes and Its Impact on the Cycling Behaviour Against Wet Impregnated WI‐NaNMC and Prussian White Cathodes

Szczęsna‐Chrzan

Trzeciak²,

Zybert

et al. 2022

Adv Materials Inter

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The article describes a research on new salts and cathode materials dedicated to sodium cells. Sodium technology is considered to be one of the most promising (for new battery generations) and has been very actively (re)‐developed for more than a decade. The first part of this work is mainly focused on electrochemical studies of the low coordinating Hückel type salt (4,5‐dicyano‐2‐(trifluoromethyl)imidazolate, NaTDI)‐based electrolytes with and without solid electrolyte interface modified additives: fluoroethylene carbonate (FEC). In the second part electrolytes are tested in a half‐cells with layered oxides. Sodium nickel‐manganese‐cobalt oxide (NaNMC) and WI‐NaNMC‐333 and WI‐NaNMC‐622 layered cathode materials are prepared by wet impregnation synthesis (WI) routine. Prussian White is obtained from University of Uppsala group to compare and initial electrochemical properties against electrolyte with NaTDI. Basic physicochemical properties of the obtained powders are also reported in the manuscript. The best properties are recorded for 0.75 m NaTDI in EC:DMC (1:1 v/v) with 3% FEC additive by its conductivity (11.52 mS cm−1 for 20 °C). The same solution also shows promising results during electrochemical tests in half‐cell geometry against WI‐NaNMC‐622 cathode (114.22 mAh g−1 after 1 cycle C/20). NaPF6 salt is used as an electrolyte as a commercially available reference.

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Comparative Study of Alkali‐Cation‐Based (Li⁺, Na⁺, K⁺) Electrolytes in Acetonitrile and Alkylcarbonates

et al. 2019

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The development of a suitable functional electrolyte is urgently required for fast-charging and high-voltage alkali-ion (Li, Na, K) batteries as well as next-generation hybrids supercapacitors. Many recent works focused on an optimal selection of electrolytes for alkali-ion based systems and their electrochemical performance but the understanding of the fundamental aspect that explains their different behaviour is rare. Herein, we report a comparative study of transport properties for LiPF 6 , NaPF 6 , KPF 6 in acetonitrile (AN) and a binary mixture of ethylene carbonate (EC), dimethyl carbonate (DMC): (EC/DMC : 1/1, weigh) through conductivities, densities and viscosities meas-urements in wide temperature domain. By application of the Stokes-Einstein, Nernst-Einstein, and Jones Dole equations, the effective ionic solvated radius of cation (r eff ), the ionic dissociation coefficient (α D ) and structuring Jones Dole's parameters (A, B) for salt are calculated and discussed according to solvent or cation nature as a function of temperature. From the results, we demonstrate that better mobility of potassium can be explained by the nature of the ion-ion and ion-solvent interactions due to its polarizability. In the same time, the predominance of triple ions in the case of K + , is a disadvantage at high concentration.

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Optimization of the lithium-ion cell electrolyte composition through the use of the LiTDI salt

Cited by 32 publications

References 21 publications

LiTDI and solvent mixture based electrolytes for lithium-ion cells

LiTDI and solvent mixture based electrolytes for lithium-ion cells

Systematic Studies on Liquid Sodium 4,5‐dicyano‐2‐(trifluoromethyl)imidazolate (NaTDI)‐Based Electrolytes and Its Impact on the Cycling Behaviour Against Wet Impregnated WI‐NaNMC and Prussian White Cathodes

Comparative Study of Alkali‐Cation‐Based (Li⁺, Na⁺, K⁺) Electrolytes in Acetonitrile and Alkylcarbonates

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Optimization of the lithium-ion cell electrolyte composition through the use of the LiTDI salt

Cited by 32 publications

References 21 publications

LiTDI and solvent mixture based electrolytes for lithium-ion cells

LiTDI and solvent mixture based electrolytes for lithium-ion cells

Systematic Studies on Liquid Sodium 4,5‐dicyano‐2‐(trifluoromethyl)imidazolate (NaTDI)‐Based Electrolytes and Its Impact on the Cycling Behaviour Against Wet Impregnated WI‐NaNMC and Prussian White Cathodes

Comparative Study of Alkali‐Cation‐Based (Li+, Na+, K+) Electrolytes in Acetonitrile and Alkylcarbonates

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Comparative Study of Alkali‐Cation‐Based (Li⁺, Na⁺, K⁺) Electrolytes in Acetonitrile and Alkylcarbonates