The Corrosion Study of Al Current Collector in Phosphonium Ionic Liquid as Solvent for Lithium Ion Battery

Cha, Eun-Hee; Mun, Junyoung; Cho, E.-Rang; Yim, Taeeun; Kim, Young-Gyu; Oh, Sung-Tag; Lim, SooA; Lim, Jea-Wook

doi:10.5229/jkes.2011.14.3.152

Cited by 12 publications

(8 citation statements)

References 11 publications

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“…[23][24][25][26] It is interesting to note that the well-known corrosive nature of the LiTFSI salt is decreased when ionic liquids were added to the electrolyte composition. 17,27,28 In addition to the corrosion inhibition, the so-called passive films formed on the substrate in the presence of ionic liquid electrolytes show better thermal stability. 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.…”

Section: Introductionmentioning

confidence: 99%

“…17,27,28 In addition to the corrosion inhibition, the so-called passive films formed on the substrate in the presence of ionic liquid electrolytes show better thermal stability. 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.…”

Section: Introductionmentioning

confidence: 99%

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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%

Section: Introductionmentioning

confidence: 99%

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

et al. 2018

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“…They are playing more and more important roles in many areas of electrochemical processes. Indeed, quite a number of task-specific ILs behave not only as solvents suitable for electrochemical devices and methods but also as unique and robust electrolytes. − …”

Section: Introductionmentioning

confidence: 99%

Corrosion Behavior of Metallic Materials in Acidic-Functionalized Ionic Liquids

Han

et al. 2016

ACS Sustainable Chem. Eng.

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This paper describes the influence of temperature, water content, and anionic type of acidic-functionalized ionic liquids (ILs), 1-(4-sulfobutyl)-3-methylimidazolium hydrogen sulfate ([BsMIM][HSO 4 ]) and 1-(4-sulfobutyl)-3-methylimidazolium toluenesulfonate ([BsMIM][OTs]), on the corrosion behavior of Fe, Ni, and 304 stainless steel (304SS). Electrochemical methods including electrochemical impedance spectroscopy (EIS) and Tafel plots were used to investigate it. Also, scanning electron microscopy (SEM) was used to characterize the nature of the corrosion morphology. The obtained electrochemical results indicated that increasing temperature accelerates the corrosion, while decreasing IL concentration retards the corrosion. The corrosion process is controlled by charge transfer. Moreover, the bisulfate anion (HSO 4 −) has an effect on the corrosion rate more significantly than the p-toluenesulfonate anion (OTs − ) does. The SEM spectrum showed that the corrosion situation of Fe is more serious than Ni and 304SS performed in IL-based solutions, especially in [BsMIM][HSO 4 ]. Also, the protective layer formed on the 304SS surface is more uniform. On the basis of these consistent finds, the corrosion mechanism is assumed.

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“…It is widely accepted that carbonate electrolytes with an amide salt, such as LiTFSI and LiFSI, could not passivate Al. On the contrary, LiPF 6 salt could very well passivate Al by forming insoluble AlF 3 and LiF. − The passivation behavior for ILEs with amide salt is controversial. − Our group recently reported a corrosion/passivation behavior of ILEs and demonstrated that the PMpipFSI with various LiFSI concentrations could sufficiently passivate the Al current collector; however, they all show corrosion effects toward stainless-steel coin cell parts, with corrosion significantly suppressed for the high-concentration ILEs . Therefore, to eliminate the high-voltage exposure of ILEs to the stainless steel in the standard 2032-coin cells, we used the Al-coated 2032-coin cells shown in Figure c for all of the cell testing.…”

Section: Resultsmentioning

confidence: 99%

Stabilized Electrode/Electrolyte Interphase by a Saturated Ionic Liquid Electrolyte for High-Voltage NMC532/Si-Graphite Cells

Liu

Jiang

Muñoz

et al. 2020

ACS Appl. Mater. Interfaces

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Nonaqueous electrolyte has become one of the technical barriers in enabling Li-ion battery comprising of a high voltage cathode and high capacity anode. In this work, we demonstrate a saturated piperidinum bis(fluorosulfonyl)imide ionic liquid (IL) with a LiFSI salt not only supports the redox reaction on the cathode at high voltages, but also shows exceptional kinetic stability on the lithiated anode as evidenced by its improved cycling performance in a NMC532/Si-graphite full cells cycled between 4.6 and 3.0 V. On the basis of the spectroscopic/microscopic analysis and molecular dynamics (MD) simulations, the superior performance of the cells is attributed to the formation of solid-electrolyte-interphase on both electrode as well as unique solvation structure where a deadlocked coordination network is established at the saturated state, which prevents transition metal dissolution into the electrolyte via a solvation process.

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The Corrosion Study of Al Current Collector in Phosphonium Ionic Liquid as Solvent for Lithium Ion Battery

Cited by 12 publications

References 11 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

Corrosion Behavior of Metallic Materials in Acidic-Functionalized Ionic Liquids

Stabilized Electrode/Electrolyte Interphase by a Saturated Ionic Liquid Electrolyte for High-Voltage NMC532/Si-Graphite Cells

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