Pure ionic liquid electrolytes compatible with a graphitized carbon negative electrode in rechargeable lithium-ion batteries

Ishikawa, Masashi; Sugimoto, Toshinori; Kikuta, Manabu; Ishiko, Eriko; Kono, Mitsuhiko

doi:10.1016/j.jpowsour.2006.02.077

Cited by 546 publications

(426 citation statements)

References 17 publications

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“…The efficiencies are low from the beginning and, as for LiTDI, the capacity decay at C/10 is marked and no capacity can be cycled after the rate-test with this electrolyte. If we compare with LiBF4 (Figure 4e), the less conductive electrolyte, we can see that the LiBF4 electrolyte performs far better with, in particular, well defined insertion plateaus at C/5 and stable capacity, which shows the poor properties of the SEI layers formed in the LiFSI electrolyte (be them on Li metal or graphite), whereas this salt has shown good performance vs. either graphite or Li metal, in either carbonate-based electrolytes [36,60] or in ionic liquidsbased electrolytes [61,62]. LiTFSI (Figure 4d) shows decent initial performance with well-defined plateaus until C/5.…”

Section: This Contrasts To What Was Reported In Ec-based Electrolymentioning

confidence: 96%

Towards practical sulfolane based electrolytes: Choice of Li salt for graphite electrode operation

Zhang

Porcher

Paillard

2018

Journal of Power Sources

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Abstract:Sulfolane (tetramethylene sulfone, SL) is known for leading to Li-ion electrolytes with high anodic stability. However, the operation of graphite electrodes in alternative electrolytes is usually challenging, especially when ethylene carbonate (EC) is not used as co-solvent. Thus, we study here the influence of the lithium salt on the physico-chemical and electrochemical properties of EC-free SL-based electrolytes and on the performance of graphite electrodes based on carboxymethyl cellulose (CMC). SL mixed with dimethyl carbonate (DMC) leads to electrolytes as conductive as state-of-theart alkyl carbonate-based electrolytes with wide electrochemical stability windows. The compatibility with graphite electrodes depends on the Li salt used and, even though cycling is possible with most salts, lithium difluoro-oxalato borate (LiDFOB) is especially interesting for graphite operation.LiDFOB electrolytes are conductive at room temperature (ca. 6 mS cm -1 ) with an anodic stability slightly below 5 V vs. Li/Li + on particulate carbon black electrodes. In addition, it allows cycling graphite electrodes with steady capacity and high coulombic efficiency without any additive. The testing of graphite electrodes in half-cells is, however, problematic with SL:DMC mixtures and, by switching the Li metal counter electrode for LiFePO4, the graphite electrode achieves better practical performance in terms of rate capability.

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Section: This Contrasts To What Was Reported In Ec-based Electrolymentioning

confidence: 96%

Towards practical sulfolane based electrolytes: Choice of Li salt for graphite electrode operation

Zhang

Porcher

Paillard

2018

Journal of Power Sources

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“…(DEME-TFSA) [4], 1-ethyl-3-methylimizadolium bis(fluorosulfonyl) amide (EMI-FSA) [5], and N-methyl-N-propylpyrrolidinium bis(fluorosulfonyl) amide (P 13 -FSA) [6].…”

Section: N N-diethyl-n-methyl-n-(2-methoxyethyl) Ammonium Bis(triflumentioning

confidence: 99%

Influence of the binder types on the electrochemical characteristics of natural graphite electrode in room-temperature ionic liquid

Ui¹,

Towada²,

Agatsuma³

et al. 2011

Journal of Power Sources

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“…Among various IL-based electrolytes, only FSI ¹ -based IL electrolytes can make a Li-ion battery operate without any electrolyte additives. [1][2][3] The Li-ion batteries assembled with FSI ¹ -based IL electrolytes show quite good electrode/electrolyte interfacial performance. [4][5][6] However, the control of electrochemical stability of EMImFSIbased IL electrolytes at a graphite electrode/electrolyte interface is quite difficult.…”

Section: Introductionmentioning

confidence: 99%

A New Prospect for Stabilization of Graphite Electrode/Electrolyte Interface in Bis(fluorosulfonyl)imide Anion-based Ionic Liquid Electrolyte

2018

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We investigated effects of high lithium bis(fluorosulfonyl)imide (LiFSI) salt concentration or heat treatment before initial charge on charge-discharge performance of a graphite electrode in a 1-ethyl-3-methylimidazolium (EMImFSI)-based ionic liquid (IL) electrolyte. LiF was observed at the surface of graphite electrodes taken out from 2.00 mol kg −1 LiFSI/EMImFSI system and from 0.32 mol kg −1 LiFSI/EMImFSI system with pre-heat treatment before the initial charge. The surface LiF effectively suppresses the reductive decomposition of EMIm + . As a result, the irreversible capacity of initial cycle was significantly suppressed and the coulombic efficiency of subsequent cycles was greatly improved.

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Pure ionic liquid electrolytes compatible with a graphitized carbon negative electrode in rechargeable lithium-ion batteries

Cited by 546 publications

References 17 publications

Towards practical sulfolane based electrolytes: Choice of Li salt for graphite electrode operation

Towards practical sulfolane based electrolytes: Choice of Li salt for graphite electrode operation

Influence of the binder types on the electrochemical characteristics of natural graphite electrode in room-temperature ionic liquid

A New Prospect for Stabilization of Graphite Electrode/Electrolyte Interface in Bis(fluorosulfonyl)imide Anion-based Ionic Liquid Electrolyte

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