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Gavritchev, K. S.; Sharpataya, G. A.; Smagin, A. A.; Malyi, E. N.; Matyukha, V. A.

doi:10.1023/a:1025125306291

Cited by 48 publications

(18 citation statements)

References 3 publications

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“…At temperatures above 390 o K, the evolution of HF and POF 3 persists, most likely proceeding simultaneously via reactions [2] and [3] until all the LiPF 6 is completely converted into LiF.…”

Section: Thermal Decomposition Pathway Of Lipfmentioning

confidence: 99%

“…The thermal stability and interaction of this salt with the organic solvents in the electrolytes have been studied experimentally [1][2][3] by Thermogravimetric Analysis (TGA), Differential Scanning Calorimetry (DSC) and Accelerating Rate Calorimetry (ARC), and computationally by Density Functional Theory (DFT) and Molecular Dynamics (MD) methods 4 . However, all the thermal analysis techniques used so far test thermal stability based on macroscopic quantities such as mass loss, heat flow, or self-heating rate measured as a function of temperature.…”

Section: Introductionmentioning

confidence: 99%

“…LiCoO 2 and LiNiO 2 ), while Abraham et al attributed production of fluoro-organics in DEC:LiPF 6 electrolyte to a catalytic effect of POF 3 generated by reaction of alcohol impurities with PF 5 . Clearly, the thermochemistry of the commonly used Li-ion battery electrolytes still needs further elucidation.…”

Section: Introductionmentioning

confidence: 99%

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Thermal stability of LiPF6 salt and Li-ion battery electrolytes containing LiPF6

Yang

Zhuang

Ross

2006

Journal of Power Sources

453

293

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The thermal stability of the neat LiPF 6 salt and of 1 molal solutions of LiPF 6 in prototypical Li-ion battery solvents was studied with thermogravimetric analysis (TGA) and on-line FTIR. Pure LiPF 6 salt is thermally stable up to 380 o K in a dry inert atmosphere, and its decomposition path is a simple dissociation producing LiF as solid and PF 5 as gaseous products. In the presence of water (300 ppm) in the carrier gas, its decomposition onset temperature is lowered as a result of direct thermal reaction between LiPF 6 and water vapor to form POF 3 and HF. No new products were observed in 1 molal solutions of LiPF 6 in EC, DMC and EMC by on-line TGA-FTIR analysis. The storage of the same solutions in sealed containers at 358 o K for 300 -420 hrs. did not produce any significant quantity of new products as well. In particular, no alkylflurophosphates were found in the solutions after storage at elevated temperature. In the absence of either an impurity like alcohol or cathode active material that may (or may not) act as a catalyst, there is no evidence of thermally induced reaction between LiPF 6 and the prototypical Liion battery solvents EC, PC, DMC or EMC.

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Section: Thermal Decomposition Pathway Of Lipfmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Thermal stability of LiPF6 salt and Li-ion battery electrolytes containing LiPF6

Yang

Zhuang

Ross

2006

Journal of Power Sources

453

293

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“…[83–85] In our case, it appears that the O=PF 3 was formed in situ and reacted further with water to form [PO 2 F 2 ] − and HF. Others have observed similar reactions.…”

Section: Resultsmentioning

confidence: 77%

Ruthenium (II) and iridium (III) complexes of N-heterocyclic carbene and pyridinol derived bidentate chelates: Synthesis, characterization, and reactivity

Gerlach

Siek

Burks

et al. 2017

Inorganica Chimica Acta

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We report the synthesis and characterization of new ruthenium(II) and iridium(III) complexes of a new bidentate chelate, NHCR’-pyOR (OR = OMe, OtBu, OH and R’ = Me, Et). Synthesis and characterization studies were done on the following compounds: four ligand precursors (1–4); two silver complexes of these NHCR’-pyOR ligands (5–7); six ruthenium complexes of the type [η6-(p-cymene)Ru(NHCR’-pyOR)Cl]X with R’ = Me, Et and R = Me, tBu, H and X = OTf−, PF6− and PO2F2− (8–13); and two iridium complexes, [Cp*Ir(NHCMe-pyOtBu)Cl]PF6 (14) and [Cp*Ir(NHCMe-pyOH)Cl]PO2F2 (15). The complexes are air stable and were isolated in moderate yield. However, for the PF6− salts, hydrolysis of the PF6− counter anion to PO2F2− during t-butyl ether deprotection was observed. Most of the complexes were characterized by 1H and 13C-NMR, MS, IR, and X-ray diffraction. The ruthenium complexes [η6-(p-cymene)Ru(NHCMe-pyOR)Cl]OTf (R = Me (8) and tBu (9)) were tested for their ability to accelerate CO2 hydrogenation and formic acid dehydrogenation. However, our studies show that the complexes transform during the reaction and these complexes are best thought of as pre-catalysts.

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“…Apart from hydrolytic instability, the major problems are its considerable thermal instability and the equilibrium with its molecular dissociation compounds LiF and PF 5 , even at room temperature . The salt decomposes above 177 °C, however, decomposition reactions beginning above 55 °C are sufficient to affect lithium and lithium ion battery cycling …”

Section: Anion Types and Their Propertiesmentioning

confidence: 99%

Electrolytes for Lithium (Sodium) Batteries Based on Ionic Liquids: Highlighting the Key Role Played by the Anion

Rüther

Bhatt

Best

et al. 2020

Batteries & Supercaps

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Research since 2000 has clearly shown that ionic liquids (ILs) and their metal salt containing mixtures have good potential to be considered as electrolytes (ILELs) in lithium and other electropositive metal (ion) batteries. This outcome is particularly relevant for the operation of such devices in elevated temperature regimes where ILELs would have a significant advantage over the conventional organic carbonate solvent/LiPF6 electrolytes that, due to their limited thermal stability and flammability, cause concerns about the safety of current LIB technology. There is evidence from a number of review articles that physicochemical properties can be tailored such that ILELs could meet requirements for operating in batteries at lower temperature regimes. By drawing on a broad range of cation/anion combinations, there is further evidence from these papers that within a particular family of cations, the physicochemical properties of ILs and ILELs are largely defined by the anion component. Despite the key role of the anion there are few reviews that have sections dedicated to this aspect. This review surveys the physicochemical, transport and structural properties of ILs (mainly pyrrolidinium salts) and ILELs employing prominent and representative anion classes.

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Untitled

Cited by 48 publications

References 3 publications

Thermal stability of LiPF6 salt and Li-ion battery electrolytes containing LiPF6

Thermal stability of LiPF6 salt and Li-ion battery electrolytes containing LiPF6

Ruthenium (II) and iridium (III) complexes of N-heterocyclic carbene and pyridinol derived bidentate chelates: Synthesis, characterization, and reactivity

Electrolytes for Lithium (Sodium) Batteries Based on Ionic Liquids: Highlighting the Key Role Played by the Anion

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