608140-12-1Relevant articles and documents
Speciation of aluminium in mixtures of the ionic liquids [C 3mpip] [NTf2] and [C4mpyr] [NTf2] with AlCl3: An electrochemical and nmr spectroscopy study
Rodopoulos, Theo,Smith, Leanne,Home, Michael D.,Ruether, Thomas
, p. 3815 - 3826 (2010)
This paper reports on the electrodeposition of aluminium on sev-eral substrates from the air- and water-stable ionic liquids 1-propyl-l-methyl- piperidinium bis(trifluoromethylsulfo-nyl)amide ([C3mpip][NTf 2]) and 1-butyl-1-methylpyrrolidinium bis(tri-fluoromethylsulfonyl) amide ([C4mpyr]-[NTf2]), which contain anhydrous AlCl 3. At an AlCl3 concentration of 0.75 molal, no evidence for aluminium electrodeposition was observed in either system at room temperature. However, aluminium electrodeposition becomes feasible upon heating the samples to 80°C. Aluminium electrode-position from bis(trifluoromethylsulfo-nyl)amide-based ionic liquids that con-tain AlCl 3 has previously been shown to be very dependent upon the AlCl 3 concentration and has not been dem-onstrated at AlCl3 concentrations below 1.13 molal. The dissolution of AlCl3 in [C 3mpip][NTf2] and [C4mpyr]-[NTf2] was studied by variable-temper-ature 27Al NMR spectroscopy to gain insights on the electroactive species re-sponsible for aluminium electrodeposi-tion. A similar change in the aluminium speciation with temperature was observed in both ionic liquids, thereby indicating that the chemistry was simi-lar in both. The electrodeposition of aluminium was shown to coincide with the formation of an asymmetric four-coordinate aluminium-containing spe-cies with an 27Al chemical shift of δ = 94 and 92 ppm in the [C3mpip] [NTf2]-AlCl3 and [C4mpyr] [NTf2]-AlCl3 sys-tems, respectively. It was concluded that the aluminium-containing species that give rise to these resonances corre-sponds to the electroactive species and was assigned to [AlCl3(NTf2)]-.
A Cation-Tethered Flowable Polymeric Interface for Enabling Stable Deposition of Metallic Lithium
Huang, Zhuojun,Choudhury, Snehashis,Gong, Huaxin,Cui, Yi,Bao, Zhenan
, p. 21393 - 21403 (2021/01/11)
A fundamental challenge, shared across many energy storage devices, is the complexity of electrochemistry at the electrode-electrolyte interfaces that impacts the Coulombic efficiency, operational rate capability, and lifetime. Specifically, in energy-dense lithium metal batteries, the charging/discharging process results in structural heterogeneities of the metal anode, leading to battery failure by short-circuit and capacity fade. In this work, we take advantage of organic cations with lower reduction potential than lithium to build an electrically responsive polymer interface that not only adapts to morphological perturbations during electrodeposition and stripping but also modulates the lithium ion migration pathways to eliminate surface roughening. We find that this concept can enable prolonging the long-term cycling of a high-voltage lithium metal battery by at least twofold compared to bare lithium metal.
An ionic compound, and an electrolyte solution and a secondary battery comprising an ionic compound
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Paragraph 0113; 0126; 0129-0130, (2020/04/17)
An electrolyte for a secondary, battery and Si an electrolytic solution for a secondary battery and 1 a 2 secondary battery comprising the same are provided to improve the stability of a secondary battery by using an ionic compound having a structure represented by the following Chemical Formula I, No.No. STR84No.No. wherein X is an ionic compound having a structure represented by Structural Formula (I). No.No. STR84No.No. The compound of formula ( Claim The compound of formula ( Claim (by machine translation)
Ionic liquids based on (fluorosulfonyl)(pentafluoroethanesulfonyl)imide with various oniums
Liu, Kai,Zhou, Yi-Xuan,Han, Hong-Bo,Zhou, Si-Si,Feng, Wen-Fang,Nie, Jin,Li, Hong,Huang, Xue-Jie,Armand, Michel,Zhou, Zhi-Bin
experimental part, p. 7145 - 7151 (2011/01/08)
New hydrophobic ionic liquids based on (fluorosulfonyl) (pentafluoroethanesulfonyl)imide ([(FSO2)(C2F 5SO2)N]-, FPFSI-) anion with various oniums, including imidazolium, tetraalkyl ammonium, pyrrolidinium, and piperidinium, were prepared and characterized. Their physicochemical and electrochemical properties, including phase transitions, thermal stability, viscosity, density, specific conductivity and electrochemical windows, were extensively characterized, and were comparatively studied with the corresponding ionic liquids containing the isomeric but symmetric TFSI- ([(CF 3SO2)2N]-) anion. These new FPFSI--based ionic liquids display low melting points, low viscosities, good thermal stability, and wide electrochemical windows allowing Li deposition/dissolution. All these desired properties suggest they are potential electrolyte materials for Li (or Li-ion) batteries.