Lithium Secondary Batteries Using Modified-Imidazolium Room-Temperature Ionic Liquid

Seki, Shiro; Kobayashi, Yo; Miyashiro, Hajime; Ohno, Yasutaka; Usami, Akira; Mita, Yuichi; Kihira, Nobuo; Watanabe, Masayoshi; Terada, Nobuyuki

doi:10.1021/jp0620872

Cited by 339 publications

(230 citation statements)

References 18 publications

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“…1,2 The solution chemistry of lithium salts in RTILs has been particularly interesting, as it provides molecular insights into the ionic conductivity of lithium-ion batteries. [3][4][5][6][7][8][9] The solution chemistry of lanthanide ions in RTILs has also been important, as it is essential for solvent extraction and metal-ion complexation. [10][11][12] Jensen et al 13,14 discussed the extraction of lanthanide (Ln 3+ ) complexes from an aqueous solution to RTILs on the basis of their solution structures.…”

Section: Introductionmentioning

confidence: 99%

Solvation Structures of Some Transition Metal(II) Ions in a Room-Temperature Ionic Liquid, 1-Ethyl-3-methylimidazolium Bis(trifluoromethanesulfonyl)amide

et al. 2008

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Section: Introductionmentioning

confidence: 99%

Solvation Structures of Some Transition Metal(II) Ions in a Room-Temperature Ionic Liquid, 1-Ethyl-3-methylimidazolium Bis(trifluoromethanesulfonyl)amide

et al. 2008

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“…One is the synthesis of lithium ILs, 78,79 and the second is the addition of suitable lithium salts to aprotic ILs. [80][81][82][83] For the first approach, room-temperature lithium ILs were successfully synthesized by designing borate anions having both electron-withdrawing groups and oligo(ethylene oxide) groups. The electron-withdrawing groups contribute to the lowering of the Lewis basicity of the anion and the oligo(ethylene oxide) structure contributes to the dissociation of Li + from the anionic center.…”

Section: © -Conducting Ils and Solvate Ilsmentioning

confidence: 99%

Design and Materialization of Ionic Liquids Based on an Understanding of Their Fundamental Properties

Watanabe

2016

Electrochemistry

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Ionic liquids (ILs) are defined as salts that have melting points lower than 100°C. Most are organic salts, and these may be designed and tailored to have suitable properties. ILs are recognized as a third group of solvents (and electrolytes), after water and organic solvents. They are characterized by their unique properties such as nonvolatilities, high thermal stabilities, and high ionic conductivities. In this article, our work on the design and preparation of ILs is briefly reviewed. The concept of ionicity is proposed as a metric to characterize the basic nature (dissociativity) of ILs, which is affected by the Lewis acidity/basicity of cations/anions (i.e., coulombic interactions), the directionality of interactions between cations and anions, and van der Waals interactions between ions. The ionicity of ILs is dominated by a subtle balance between coulombic and van der Waals interactions, which clearly discriminates ILs from conventional high-temperature inorganic molten salts. Here, the design of protic ILs for fuel cell electrolytes, electron-transporting ILs for dye-sensitized solar cell electrolytes, and Li + -conducting solvate ILs for lithium battery electrolytes are discussed based on an understanding of the fundamental properties of ILs. Furthermore, the combination of ILs with polymers and colloidal particles affords intriguing quasi-solid materials (ion gels), and the ion transport in these gels is decoupled from the mechanical relaxation time of these materials, yielding new solid electrolytes. The possibility of temperature and photo-sensitive solubility dependence of polymers in ILs allows the creation of stimuli-responsive materials. Finally, protic ILs/protic salts are demonstrated to be good precursors for N-doped carbon materials.

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“…Imidazolium-based cations suffer from cathodic instabilities. Improvements in this area were demonstrated by Seki et al (2006), whereas a ring substitution allowed for improved cycling efficiency against lithium metal. High stability windows have been reported for ILs containing TFSI anion (Borgel et al 2009).…”

Section: Electrolytes Based On Ionic Liquidsmentioning

confidence: 99%

Electrolytes for high-energy lithium batteries

et al. 2011

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From aqueous liquid electrolytes for lithiumair cells to ionic liquid electrolytes that permit continuous, high-rate cycling of secondary batteries comprising metallic lithium anodes, we show that many of the key impediments to progress in developing next-generation batteries with high specific energies can be overcome with cleaver designs of the electrolyte. When these designs are coupled with as cleverly engineered electrode configurations that control chemical interactions between the electrolyte and electrode or by simple additives-based schemes for manipulating physical contact between the electrolyte and electrode, we further show that rechargeable battery configurations can be facilely designed to achieve desirable safety, energy density and cycling performance.

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Lithium Secondary Batteries Using Modified-Imidazolium Room-Temperature Ionic Liquid

Cited by 339 publications

References 18 publications

Solvation Structures of Some Transition Metal(II) Ions in a Room-Temperature Ionic Liquid, 1-Ethyl-3-methylimidazolium Bis(trifluoromethanesulfonyl)amide

Solvation Structures of Some Transition Metal(II) Ions in a Room-Temperature Ionic Liquid, 1-Ethyl-3-methylimidazolium Bis(trifluoromethanesulfonyl)amide

Design and Materialization of Ionic Liquids Based on an Understanding of Their Fundamental Properties

Electrolytes for high-energy lithium batteries

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