New covalent salts of the 4+V class for Li batteries

Niedzicki, Leszek; Grugeon, Sylvie; Laruelle, Stéphane; Judeinstein, Patrick; Bukowska, Maria; Prejzner, J.; Szczeciński, Przemysław; Wieczorek, W.; Armand, Michel

doi:10.1016/j.jpowsour.2011.06.030

Cited by 76 publications

(76 citation statements)

References 12 publications

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“…Apart from the aforementioned classes of lithium salts, Niedzicki et al [119,120] reported imidazolebased lithium salts, which were targeted to comply with the safety requirements for largescale LIBs. In particular, lithium 4,5-dicyano-2-(trifluoromethyl)-imidazole (LiTDI) revealed very promisinge lectrochemical and safety properties, offering decent ionic conductivities, low sensitivity towards the presence of water,a nd high thermals tability (decomposition temperature !…”

Section: Furtheralternative Lithium Saltsmentioning

confidence: 99%

Safer Electrolytes for Lithium‐Ion Batteries: State of the Art and Perspectives

et al. 2015

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Lithium-ion batteries are becoming increasingly important for electrifying the modern transportation system and, thus, hold the promise to enable sustainable mobility in the future. However, their large-scale application is hindered by severe safety concerns when the cells are exposed to mechanical, thermal, or electrical abuse conditions. These safety issues are intrinsically related to their superior energy density, combined with the (present) utilization of highly volatile and flammable organic-solvent-based electrolytes. Herein, state-of-the-art electrolyte systems and potential alternatives are briefly surveyed, with a particular focus on their (inherent) safety characteristics. The challenges, which so far prevent the widespread replacement of organic carbonate-based electrolytes with LiPF6 as the conducting salt, are also reviewed herein. Starting from rather "facile" electrolyte modifications by (partially) replacing the organic solvent or lithium salt and/or the addition of functional electrolyte additives, conceptually new electrolyte systems, including ionic liquids, solvent-free, and/or gelled polymer-based electrolytes, as well as solid-state electrolytes, are also considered. Indeed, the opportunities for designing new electrolytes appear to be almost infinite, which certainly complicates strict classification of such systems and a fundamental understanding of their properties. Nevertheless, these innumerable opportunities also provide a great chance of developing highly functionalized, new electrolyte systems, which may overcome the afore-mentioned safety concerns, while also offering enhanced mechanical, thermal, physicochemical, and electrochemical performance.

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Section: Furtheralternative Lithium Saltsmentioning

confidence: 99%

Safer Electrolytes for Lithium‐Ion Batteries: State of the Art and Perspectives

et al. 2015

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“…The reason for which the viscosity of LiTDI solutions is lower than the other lithium salts is due to different factors such as: (i) charge delocalization: electrostatic interactions between ions of opposite charge in LiTDI and LiTFSI should be less strong than in LiPF 6 due to charge delocalization [10]. (ii) The size and shape of the anion: because of the flat shape of TDI À anions friction between solvent molecules linked to cations or not, is limited.…”

Section: Viscositymentioning

confidence: 99%

“…In 1998, in looking for a truly covalent anion not prone to hydrolysis and HF generation, the concept of "Hückel anions" was introduced in the field of electrolytes for LiBs [9]. Owing to (i) its high thermal stability, (ii) stability in the presence of water and (iii) its electrochemical stability [10], the lithium 4,5-dicyano-2-trifluoromethyl-imidazolide (LiTDI) has been proposed as a new lithium salt for use in LiBs. The electrolyte's most important function is charge transportation from one electrode to the other.…”

Section: Introductionmentioning

confidence: 99%

LiTDI as electrolyte salt for Li-ion batteries: transport properties in EC/DMC

Berhaut

Porion

Timperman

et al. 2015

Electrochimica Acta

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“…7 Nevertheless, the ionic conductivity of LATP is still lower than liquid-based electrolytes (e.g. 10.8 mS cm ¹1 for LiPF 6 1 M in EC-DMC) 8 and further improvement of ionic conductivity is expected for the application.…”

Section: Introductionmentioning

confidence: 99%

Synthesis and Electrochemical Properties of LATP-LLTO Lithium Ion Conductive Composites

et al. 2016

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In order to improve the ionic conductivity of NASICON-type lithium ion conductor, Li 1.3 Al 0.3 Ti 1.7 (PO 4 ) 3 (LATP), lithium ion conductive composites have been prepared to disperse the perovskite-type lithium ion conductor, Li 0.348 La 0.55 TiO 3 (LLTO), in the LATP matrix. X-ray powder diffraction revealed that the added LLTO has reacted with LATP to form some LaPO 4 derivatives after the sintering at 1000°C. The measured conductivity of the composite increases with the amount of added LLTO up to 4 wt% showing the highest value of 7.6 × 10 −4 S cm, which is approximately three times larger than that of pristine LATP. Further amount of LLTO addition gives gradual decrease in conductivity due to the deterioration of sintered density. It is also confirmed that the transport number of lithium ion is almost unity for the LATP-LLTO composite from the DC conduction experiments using blocking electrode.

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New covalent salts of the 4+V class for Li batteries

Cited by 76 publications

References 12 publications

Safer Electrolytes for Lithium‐Ion Batteries: State of the Art and Perspectives

Safer Electrolytes for Lithium‐Ion Batteries: State of the Art and Perspectives

LiTDI as electrolyte salt for Li-ion batteries: transport properties in EC/DMC

Synthesis and Electrochemical Properties of LATP-LLTO Lithium Ion Conductive Composites

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