Ionic liquid electrolyte of lithium bis(fluorosulfonyl)imide/N-methyl-N-propylpiperidinium bis(fluorosulfonyl)imide for Li/natural graphite cells: Effect of concentration of lithium salt on the physicochemical and electrochemical properties

Liu, Chengyong; Ma, Xiangyuan; Xu, Fei; Zheng, Liping; Zhang, Heng; Feng, Wenfang; Huang, Xuejie; Armand, Michel; Nie, Jun; Chen, Hanlin; Zhou, Zhibin

doi:10.1016/j.electacta.2014.10.048

Cited by 98 publications

(72 citation statements)

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“…27 On the other hand, in spite of the corrosive nature of the bis(fluorosulfonyl) imide anion [FSI] -at high oxidation potentials (>4.0 V vs. Li/Li Despite their remarkable thermal stability, the use of ionic liquid mixtures as electrolytes in lithium batteries is limited by their low ionic conductivity at room temperatures as well as issues in solid electrolyte interphase formation. [30][31][32] To overcome these disadvantages, researchers have introduced the concept of hybrid electrolytes, where an organic solvent is added to the ionic liquid electrolytes so as to increase the room temperature ionic conductivity as well as to get better interfacial behaviour. 15,20,[33][34][35][36] In this work, we have tested hybrid electrolytes composed of 40 wt% ionic liquid in a conventional electrolyte system to understand the role of the ionic liquid in the passivation mechanism of aluminium foil current collector.…”

Section: Introductionmentioning

confidence: 99%

Passivation behaviour of aluminium current collector in ionic liquid alkyl carbonate (hybrid) electrolytes

et al. 2018

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The compatibility of current collectors with the electrolyte plays a major role in the overall performance of lithium batteries, critical to obtain high storage capacity as well as excellent capacity retention. In lithium-ion batteries, in particular with cathodes that operate at high voltage such as lithium nickel cobalt manganese oxide, the cathodic current collector is aluminium and it is subjected to high oxidation potentials (>4 V vs. Li/Li + ). As a result, the composition of the electrolyte needs to be carefully designed in order to stabilise the battery performance as well as to protect the current collectors against corrosion. This study examines the role of a hybrid electrolyte composed of an ionic liquid (N-methyl-N-propyl pyrrolidinium bis(trifluoromethanesulfonyl)imide or Nmethyl-N-propyl pyrrolidinium bis(fluorosulfonyl)imide) and a conventional electrolyte mixture (LiPF 6 salt and alkyl carbonate solvents) with correlation to their electrochemical behaviour and corrosion inhibition efficiency. The hybrid electrolyte was tested against battery grade aluminium current collectors electrochemically in a three-electrode cell configuration and the treated aluminium surface was characterised by SEM/EDXS, optical profilometry, FTIR, and XPS analysis. Based on the experimental results, the hybrid electrolytes allow an effective and improved passivation of aluminium and lower the extent of aluminium dissolution in comparison with the conventional lithium battery electrolytes and the neat ionic liquids at high anodic potentials (4.7 V vs. Li/Li + ). The mechanism of passivation behaviour is also further investigated. These observations provide a potential direction for developing improved hybrid electrolytes, based on ionic liquids, for higher energy density devices.npj Materials Degradation (2018) 2:13 ;

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Section: Introductionmentioning

confidence: 99%

Passivation behaviour of aluminium current collector in ionic liquid alkyl carbonate (hybrid) electrolytes

et al. 2018

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“…As typically observed for similar polymer electrolyte systems encompassing RTIL and salts, t Li+ of the polymer electrolyte membrane was found to be , viz. 0.21 at ambient temperature, which is in accord with recent literature reports[51,52].The electrochemical stability window of the composite polymer electrolyte was evaluated by linear sweep voltammetry. Results are shown in the inset of plot (b) of Fig.…”

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confidence: 83%

A simple route toward next-gen green energy storage concept by nanofibres-based self-supporting electrodes and a solid polymeric design

Zolin

Nair

Beneventi

et al. 2016

Carbon

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“…In today's LIBs, liquid electrolytes based on organic carbonates transport the Li + ions between the two electrodes. [10][11][12][13] Some of these electrolytes show also promising interfacial properties in contact to metallic lithium, [5,7,[13][14][15][16] which would be the ultimate negative electrode material for highenergy batteries. [1,2] In the last years, many research groups focused on highly concentrated electrolytes as alternatives, since these electrolytes typically exhibit low vapor pressure, high thermal stability and a broad electrochemical window.…”

Section: Introductionmentioning

confidence: 99%

“…Examples are ionic liquid/Li salt mixtures, [3][4][5] solvent-in-salt electrolytes, [6][7][8][9] and solvate ionic liquids. [5,15,20] (ii) A solvate ionic liquid consisting of an equimolar mixture of tetraglyme (G4) and LiFSI. However, highly concentrated electrolytes usually exhibit lower ionic conductivities than their carbonatebased counterparts.…”

Section: Introductionmentioning

confidence: 99%

Assessing the Ion Transport Properties of Highly Concentrated Non‐Flammable Electrolytes in a Commercial Li‐Ion Battery Cell

Sälzer

Pescara

Franke

et al. 2019

Batteries & Supercaps

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In order to assess the ion transport properties of alternative non-flammable electrolytes in a typical commercial Li-ion battery cell, we have measured the ionic conductivity s ion and the lithium-ion transference number under anion-blocking conditions, t ABC Li þ , for two classes of highly concentrated battery electrolytes: (i) Mixtures of the ionic liquid N-methyl-N-propylpyrrolidinium bis(fluorosulfonyl)imide (Pyr 13 FSI) with different amounts of the lithium bis(fluorosulfonyl)imide (LiFSI), and (ii) a solvate ionic liquid consisting of an equimolar mixture of tetraglyme (G4) and LiFSI. Together with previously published data on the solvate ionic liquid G4/LiTFSI (1 : 1), the obtained Li + ion transport data was used to estimate the overall resistance and the resulting maximum cycling rate of a commercial 10 Ah Li-ion pouch cell containing these alternative electrolytes. Our results suggest that Pyr 13 FSI/LiFSI mixtures would allow for maximum charging/discharging rates close to 1 C, while the solvate ionic liquids would only support maximum rates of about 0.3 C.

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Ionic liquid electrolyte of lithium bis(fluorosulfonyl)imide/N-methyl-N-propylpiperidinium bis(fluorosulfonyl)imide for Li/natural graphite cells: Effect of concentration of lithium salt on the physicochemical and electrochemical properties

Cited by 98 publications

References 100 publications

Passivation behaviour of aluminium current collector in ionic liquid alkyl carbonate (hybrid) electrolytes

Passivation behaviour of aluminium current collector in ionic liquid alkyl carbonate (hybrid) electrolytes

A simple route toward next-gen green energy storage concept by nanofibres-based self-supporting electrodes and a solid polymeric design

Assessing the Ion Transport Properties of Highly Concentrated Non‐Flammable Electrolytes in a Commercial Li‐Ion Battery Cell

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