Inhibition of anodic corrosion of aluminum cathode current collector on recharging in lithium imide electrolytes

Wang, Xianming; Yasukawa, Eiki; Mori, Shoichiro

doi:10.1016/s0013-4686(99)00429-6

Cited by 197 publications

(173 citation statements)

References 7 publications

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“…To tackle the challenge, much effort has been made. A general approach is to adjust the solution composition of the LiTFSI based electrolyte, such as the addition of defined amount of LiPF 6 [13], the use of room temperature ionic liquid solvent [14], and so on. According to our knowledge, all these efforts are still unsatisfactory.…”

Section: Introductionmentioning

confidence: 99%

Anticorrosive flexible pyrolytic polyimide graphite film as a cathode current collector in lithium bis(trifluoromethane sulfonyl) imide electrolyte

Han

Zhang

Huang

et al. 2014

Electrochemistry Communications

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a b s t r a c t a r t i c l e i n f oFlexible pyrolytic polyimide graphite film (PGF) is explored as a cathode current collector in lithium ion batteries using lithium bis(trifluoromethane sulfonyl) imide (LiTFSI) based electrolyte. It is demonstrated that no obvious anodic current is observed up to 4.5 V versus Li + /Li for PGF, while significant corrosion current is found from 3.6 V for aluminum, indicative of better electrochemical stability of PGF than that of aluminum in LiTFSI based electrolyte. LiMn 2 O 4 on aluminum and PGF has been used as model electrode for testing. There is hardly any capacity retained after 10 cycles at room temperature for the LiMn 2 O 4 /aluminum electrode. With regard to the LiMn 2 O 4 /PGF electrode, the capacity retention ratio remained 89% after 1000 cycles. Moreover, at an elevated temperature of 55°C, the capacity retention ratio kept at 81% after 300 cycles. Since LiTFSI-based electrolyte shows advantages in safety, stability and conductivity but could not be used due to Al-corrosion, the application of the PGF current collector could overcome this barrier.

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Section: Introductionmentioning

confidence: 99%

Anticorrosive flexible pyrolytic polyimide graphite film as a cathode current collector in lithium bis(trifluoromethane sulfonyl) imide electrolyte

Han

Zhang

Huang

et al. 2014

Electrochemistry Communications

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“…4,5,8,9 The degree of aluminum corrosion by LiTFSI depended on the composition of the solvent used. 3,7,10,11 In ethylene carbonate/dimethyl carbonate solvent, for instance, the aluminum corrosion increased with cycling due to the decrease in potential. 7 Recently, electrolytes with ionic liquids 7,9,12-15 containing TFSI − anion have been found out to suppress the aluminum corrosion effectively by the stable passivation of compounds formed between cationic species of the ionic liquid and the TFSI on the aluminum surface.…”

Section: Introductionmentioning

confidence: 99%

“…The TFSI -anion dissociated in the solvent medium attacks the native aluminum oxide (Al 2 O 3 ) film on the aluminum surface to form Al-TFSI salt that is soluble in the solvents. 11,16 This exposes aluminum to the electrolyte and then allows the oxidation of aluminum metal at higher potentials.…”

Section: Introductionmentioning

confidence: 99%

Suppression of Aluminum Corrosion in Lithium Bis(trifluoromethanesulfonyl)imide-based Electrolytes by the Addition of Fumed Silica

Hamenu¹,

Lee²,

Kim³

et al. 2013

Bulletin of the Korean Chemical Society

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The corrosion property of aluminum by lithium bis(trifluoromethanesulfonyl)imide (LiTFSI) salt is investigated in liquid and gel electrolytes consisting of ethylene carbonate/propylene carbonate/ethylmethyl carbonate/diethyl carbonate (20:5:55:20, vol %) with vinylene carbonate (2 wt %) and fluoroethylene carbonate (5 wt %) using conductivity measurement, cyclic voltammetry, scanning electron microscopy, and energy dispersive X-ray spectroscopy. All corrosion behaviors are attenuated remarkably by using three gel electrolytes containing 3 wt % of hydrophilic and hydrophobic fumed silica. The addition of silica particles contributes to the increase in the ionic conductivity of the electrolyte, indicating temporarily formed physical crosslinking among the silica particles to produce a gel state. Cyclic voltammetry also gives lower anodic current responses at higher potentials for repeating cycles, confirming further corrosion attenuation or electrochemical stability. In addition, the degree of corrosion attenuation can be affected mainly by the electrolytic constituents, not by the hydrophilicity or hydrophobicity of silica particles.

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“…In the conventional electrolyte design, LiPF 6 has been exclusively used to passivate an Al current collector through the formation of insoluble AlF 3 and LiF. 4,5 However, the chemically instable LiPF 6 easily produces hydrogen fluoride (HF) with a trace water impurity, 41 which degrades both positive and negative electrodes. 42 Replacing LiPF 6 with chemically stable Li salts (e.g., LiTFSI and LiFSI) can circumvent the electrodes degradation, but instead causes the oxidative corrosion of Al current collectors.…”

Section: Enhanced Stability Toward Positive Electrodesmentioning

confidence: 99%

“…As for a positive-electrode side, lithium hexafluorophosphate (LiPF 6 ) has been almost the only option, because it can effectively passivate an Al current collector at positive electrodes to avoid its anodic corrosion (i.e., oxidative dissolution of Al ions) by providing F ¹ that produces insoluble AlF 3 and LiF on the Al surface. 4,5 Within this restriction of materials selections, the third factor, a salt concentration, is optimized to approximately 1 mol dm ¹3 on the basis of its maximized ionic conductivity (Fig. 1).…”

Section: Introductionmentioning

confidence: 99%

Developing New Functionalities of Superconcentrated Electrolytes for Lithium-ion Batteries

Yamada

2017

Electrochemistry

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The nature of electrolyte solutions is dominated by the three factors of Li salts, solvents, and their mixing ratios (salt concentrations). Conventionally, the selections of Li salts and solvents have been considered of prime importance for Li-ion battery electrolytes, while the salt concentrations have been always fixed to approximately 1 mol dm −3 based on maximized ionic conductivities. Recently, however, the salt concentrations are increasingly recognized as a key to developing new functionalities for battery electrolytes in the wake of various unusual interfacial/bulk properties discovered in superconcentrated (highly concentrated) electrolytes. For example, highly concentrated electrolytes i) passivate effectively negative electrodes, ii) facilitate rapid Li + intercalation reactions, iii) show high oxidative stabilities, iv) prevent the corrosion of Al current collectors, and v) suppress the dissolution of transition metals from positive electrodes, all of which are beneficial for battery applications. This article discusses those unique functionalities of highly concentrated electrolytes from the viewpoint of their ion-solvent and ion-ion coordination structures.

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Inhibition of anodic corrosion of aluminum cathode current collector on recharging in lithium imide electrolytes

Cited by 197 publications

References 7 publications

Anticorrosive flexible pyrolytic polyimide graphite film as a cathode current collector in lithium bis(trifluoromethane sulfonyl) imide electrolyte

Anticorrosive flexible pyrolytic polyimide graphite film as a cathode current collector in lithium bis(trifluoromethane sulfonyl) imide electrolyte

Suppression of Aluminum Corrosion in Lithium Bis(trifluoromethanesulfonyl)imide-based Electrolytes by the Addition of Fumed Silica

Developing New Functionalities of Superconcentrated Electrolytes for Lithium-ion Batteries

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