Rechargeable lithium/sulfur battery with liquid electrolytes containing toluene as additive

Choi, Jaewon; Cheruvally, Gouri; Kim, Dul-Sun; Ahn, Jou–Hyeon; Kim, Ki-Won; Ahn, Hyo‐Jun

doi:10.1016/j.jpowsour.2008.05.038

Cited by 134 publications

(70 citation statements)

References 19 publications

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“…6,7 Highly ordered, nanostructured S/carbon composites, surface coatings, and additives have been investigated in attempts to suppress the dissolution of Li 2 S x and enhance the conductivity of the cell. [8][9][10][11][12][13] Mixtures of Li salts and glyme behave like ionic liquids (ILs) and are classed as "solvate ionic liquids" (SILs). [14][15][16] 18 In this paper, the insertion and extraction of Li on an S-PE in SILs were investigated by cyclic voltammetry under various potential sweep conditions.…”

Section: Introductionmentioning

confidence: 99%

Long-cycle-life Lithium-sulfur Batteries with Lithium Solvate Ionic Liquids

et al. 2017

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The electrochemical properties of a sulfur positive electrode in equimolar glyme-Li salt mixtures were investigated. Cyclic voltammograms indicated that the insertion of Li into the sulfur/carbon composite electrode took place over at least three steps during the reduction process. In contrast, the broad anodic current suggested that the electrode kinetics for the extraction of Li were relatively slow. Stable charge-discharge operation of the Li-S cell consisting of a Li negative electrode with [Li(triglyme)][bis(trifluoromethanesulfonyl)amide] as the electrolyte was achieved at 800 cycles. This indicates that dissolution of Li 2 S x into the electrolyte was effectively suppressed in this system.

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Section: Introductionmentioning

confidence: 99%

Long-cycle-life Lithium-sulfur Batteries with Lithium Solvate Ionic Liquids

et al. 2017

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“…One slight oxidation shoulder appears near the main oxidation peak for the battery with the Thiokol binder. According to the previous studies, the reduction peak around 2.3 V could be assigned to the transition of element sulfur to the long-chain polysulfides (Li2Sx, 4 ≤ x ≤ 8), while the reduction peak around 2.0 V be attributed to the further conversion into the short-chain polysulfides such as Li2S2 and/or Li2S [20][21][22][23]. Conversely, the main oxidation peak in the lower potential represents the conversion of Li2S and/or Li2S2 to long-chain polysulfides and the shoulder at higher potential represents the further oxidation to elemental sulfur [24].…”

Section: Resultsmentioning

confidence: 88%

Thiokol with Excellent Restriction on the Shuttle Effect in Lithium–Sulfur Batteries

et al. 2018

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Commercial application of lithium-sulfur (Li-S) batteries is still greatly hampered by several issues, especially the shuttle effect of polysulfides. In this work, we proposed a simple but effective method to restrain the shuttle of the soluble polysulfides by adopting a novel binder of Thiokol in the sulfur cathode. Compared to the battery with conventional polyvinylidene fluoride (PVDF) binder, the initial discharge capacity for the battery with the Thiokol binder were increased by 42%, that is from 578 to 819 mAh/g, while the capacity after 200 cycles were increased by 201%, which is from 166 to 501 mAh/g. Besides, according to the rate capability test cycling from 0.1 to 1 C, the battery with the Thiokol binder still released a capacity amounting to 90.9% of the initial capacity, when the current density returned back to 0.1 C. Based on the UV-vis and ex situ XRD results, it is reasonably proposed that the reactions with polysulfides of the Thiokol help to restrain the shuttle effect of polysulfides. It is therefore suggested that the novel Thiokol binder holds promise for application in high-performance lithium-sulfur batteries.

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“…For example, tetrahydrofuran (THF) (Hamlen et al 2001), 1,3-dioxolane (DOXL) (Chang et al 2002;Wang et al 2010a;Jin et al 2003), dimethoxy ethane (DME), carbonates (Wang et al 2003(Wang et al , 2004a) and polyethylene glycol dimethyl ethers (PEGDME) (Ryu et al 2005;Wang et al 2010a;Choi et al 2008;Cheon et al 2003a, b;Ryu et al 2006a) have been investigated. Among these electrolytes, tetra(ethylene glycol)dimethyl ether (TEGDME), a dimethyl terminated polyethylene oxide oligomer, has been found to be particularly attractive.…”

Section: Liquid Electrolytes For High-energy Batteriesmentioning

confidence: 99%

“…Without any efforts to modify the cathode, Li/S cells employing TEGDME-based electrolytes have been shown to provide specific capacities over 1,200 mAh/g during the first charge at room temperature (Chang et al 2002;Hamlen et al 2001;Ryu et al 2006a, b). Choi et al (2007Choi et al ( , 2008 reported on the performance of TEGDME/1 M LiCF 3 SO 3 electrolyte solution, which they compared with a variety of other electrolyte formulations. Significantly, a cell employing a solution of 5 vol.% toluene in TEGDME was reported to maintain a discharge capacity of 533 mAh/g following 50 cycles at a low rate (1/16C) and exhibited near stable impedance spectra on cycling.…”

Section: Liquid Electrolytes For High-energy Batteriesmentioning

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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Rechargeable lithium/sulfur battery with liquid electrolytes containing toluene as additive

Cited by 134 publications

References 19 publications

Long-cycle-life Lithium-sulfur Batteries with Lithium Solvate Ionic Liquids

Long-cycle-life Lithium-sulfur Batteries with Lithium Solvate Ionic Liquids

Thiokol with Excellent Restriction on the Shuttle Effect in Lithium–Sulfur Batteries

Electrolytes for high-energy lithium batteries

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