Glyme-LiTFSI Complex as Electrolytes for Lithium Secondary Batteries

Nakamura, Megumi; Kazue, Yuichi; Seki, Shiro; Dokko, Kaoru; Watanabe, Masayoshi

doi:10.1149/ma2008-02/10/742

Cited by 4 publications

(3 citation statements)

References 2 publications

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“…In case of 1G and 2G, a significant weight lose due to vaporization was observed. On the other hand, little weight lose was observed for 3G and 4G, which have been known to form stable lithium ion-glyme complexes, [Li(3G)] + amd [Li(4G)] + , respectively [31]. These results are consistent with the report on the solvation ability of these gylmes against sodium ion [32,33].…”

Section: Ecs Transactions 25 (36) 169-176 (2010)supporting

confidence: 89%

The Influence of Additives on Lithium Dope/Undope Reactions for a Tin Film Electrode in a Room-Temperature Ionic Liquid Electrolyte

Miyashita¹,

Katayama²,

Miura³

et al. 2010

ECS Trans.

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Lithium dope-undope reactions of a tin thin film electrode were investigated in a room-temperature ionic liquid, 1-butyl-1-methylpyrrolidinium bis(trifluoromethylsulfonyl)amide (BMPTFSA) containing 1 M LiTFSA with and without glyme as an additive. Lithium dope-undope was possible in 1 M LiTFSA/BMPTFSA with glymes. The resistance of the electrode-electrolyte interface with glyme was smaller than that without glyme, indicating the solvation environment of Li + affects the interfacial resistance in the ionic liquid electrolyte. IntroductionVarious organic solvent-based solutions have been widely used as rechargeable lithium battery electrolytes. However, these electrolytes may cause combustion and/or explosion in case of accidents due to their flammability and volatility. Since roomtemperature ionic liquids are regarded as nonflammable and nonvolatile, ionic liquid electrolytes are expected to improve safety of rechargeable lithium battery. Among many kinds of ionic liquids, 1-butyl-1-methyl-pyrrolidinium bis(trifluoromethylsulfonyl)amide (BMPTFSA) containing LiTFSA has been investigated as a promising electrolyte because of acceptable cathodic stability and conductivity [1][2][3][4][5].Poly(ethylene glycol)dialkyl ethers are generally known as glyme , and have the chemical structure of CH 3 O (CH 2 CH 2 O) n CH 3 . Glymes have more than two oxygen atoms per molecule. These oxygen atoms exhibit the nucleophilic ability, resulting in high solvation with regard to lithium cations. The coordination and solvation states of lithium ions in glyme have been discussed [6][7][8][9][10][11][12][13] and the electrode reaction of lithium has been studied in the mixtures of ionic liquids and glymes [14][15][16][17]. ECS Transactions, 25 (36) 169-176 (2010) 10.1149/1.3393853 © The Electrochemical Society 169 ) unless CC License in place (see abstract). ecsdl.org/site/terms_use address. Redistribution subject to ECS terms of use (see 132.236.-224.35 Downloaded on 2015-06-26 to IPLithium is able to form alloy with tin at room temperature. The equilibrium phase diagram of Li-Sn system has been investigated [18] and the coulometric titration curve of Li-Sn have been measured [19,20]. The theoretical specific capacity of Li-Sn alloy (Li 4.4 Sn, 994 mAhg [21]) is higher than that of lithiated graphites (LiC 6 , 372 mAhg ). Thus, tin has been found considerable interest for use as anode materials in rechargeable lithium batteries and many reports on tin anodes have appeared in the literature [21][22][23][24][25][26][27][28][29].A tin anode reaction has been studied in a chloroaluminate ionic liquid (1-methyl-3-ethylimidazolium chloride (MEICl):AlCl 3 :LiCl =1:1.2:0.2) [30]. However, the tin anode reaction has not been studied extensively in non-chloroaluminate ionic liquids. In this study, the influence of addition of glymes on lithium dope / undope reactions for a tin film electrode was investigated in BMPTFSA containing LiTFSA. ExperimentalBMPTFSA was purchased from Kanto Kagaku. A tin film electrode was prepared by electroplating (Me...

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Section: Ecs Transactions 25 (36) 169-176 (2010)supporting

confidence: 89%

The Influence of Additives on Lithium Dope/Undope Reactions for a Tin Film Electrode in a Room-Temperature Ionic Liquid Electrolyte

Miyashita¹,

Katayama²,

Miura³

et al. 2010

ECS Trans.

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“…Recently, Henderson et al and we have investigated the electrochemical reaction of Li(I)/Li in the glyme-Li salt complexes [1,2]. Furthermore, we reported the stable charge-discharge operations for Li | glyme-Li salt complexes | LiCoO 2 coin cell [2,3]. In this study, we focus on the molecular design of novel glymes to improve the Li(I) transport properties.…”

Section: Introductionmentioning

confidence: 99%

Electrochemical Properties of New Glyme-Li Salt Equimolar Complexes for Lithium Batteries

Dokko,

Yoshida,

Tamura

et al. 2010

Meet. Abstr.

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“…HCEs originated from what are now called Solvate Ionic Liquids (SILs) which are often attributed to the early publications from the Watanabe group from around 2008-2012 for highly concentrated glyme-lithium salt solvates which are liquid at ambient temperature (e.g., (G3) 1 :LiX and (G4) 1 :LiX with G3 and G4 being triglyme and tetraglyme, while X was a bis(perfluorosulfonyl)imide anion (e.g., TFSI − (N(SO 2 CF 3 ) 2 − or FSI − (N(SO 2 F) 2 − )). [45][46][47][48][49][50][51][52][53][54][55] In actuality, however, these liquid solvates-the early predecesors for LHCEs and HCEs-were first reported as novel electrolytes years beforehand in 2001-2005 by Henderson [56][57][58] who also instigated (working with Qian) the initial HCE work in 2015 for Li metal batteries with glyme solvents and the LiFSI salt which demonstrated remarkably stable Li metal plating/stripping. 31 The lithium bis(fluorosulfonyl)imide (LiFSI) salt is of substantial interest for HCEs, as well as for other electrolyte formulations.…”

mentioning

confidence: 99%

Electrolyte Solvation and Ionic Association: Part IX. Structures and Raman Spectroscopic Characterization of LiFSI Solvates

Han¹,

Sommer²,

Boyle³

et al. 2022

J. Electrochem. Soc.

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The bis(fluorosulfonyl)imide anion N(SO2F)2- (i.e., FSI-) (also referred to as bis(fluorosulfonyl)amide (i.e., FSA-) and imidodi(sulphuryl fluoride)) has attracted tremendous interest in recent years for its utility in both lithium salts and ionic liquids for battery electrolyte applications. To facilitate the understanding of the characteristics of this anion, crystal structures are reported here for the uncoordinated anion in LiFSI-based solvates with cryptand CRYPT-222 and tetraglyme (G4). These crystalline solvates were analyzed by Raman spectroscopy to aid in assigning the Raman bands to the modes of ion coordination found in liquid electrolytes. These structures, as well as a thorough review of other relevant crystallographic data, provide insights into the rather remarkable properties of the FSI- anion with regard to solvate formation and electrolyte properties.

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Glyme-LiTFSI Complex as Electrolytes for Lithium Secondary Batteries

Abstract: not Available.

Cited by 4 publications

References 2 publications

The Influence of Additives on Lithium Dope/Undope Reactions for a Tin Film Electrode in a Room-Temperature Ionic Liquid Electrolyte

The Influence of Additives on Lithium Dope/Undope Reactions for a Tin Film Electrode in a Room-Temperature Ionic Liquid Electrolyte

Electrochemical Properties of New Glyme-Li Salt Equimolar Complexes for Lithium Batteries

Electrolyte Solvation and Ionic Association: Part IX. Structures and Raman Spectroscopic Characterization of LiFSI Solvates

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