Inhibition of anodic corrosion of aluminum cathode current collector on recharging in lithium imide electrolytes | Health & Environmental Research Online (HERO)

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Citation
Tags

HERO ID

8791623

Reference Type

Journal Article

Title

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

Author(s)

Wang, XM; Yasukawa, E; Mori, S

Year

2000

Is Peer Reviewed?

Yes

Journal

Electrochimica Acta
ISSN: 0013-4686

Volume

Issue

Page Numbers

2677-2684

DOI

10.1016/S0013-4686(99)00429-6

Web of Science Id

WOS:000087306900001

Abstract

Fitting corrosion of aluminum as cathode current collector for lithium rechargeable batteries was found to take place at potential positive of 3.5 V in 1 mol dm(-3) LiN(SO2CF3)(2)/EC + DME (1:1) electrolyte. The corrosion mechanism of aluminum in the presence of LIN(SO2CF3)(2) was proposed, and three methods were deduced to inhibit the aluminum corrosion based on this mechanism. As a result, an additive of lithium salts based on perfluorinated inorganic anions, especially LiPF6, was found to inhibit the aluminum corrosion to a certain extent by forming a protective film on aluminum surface. The oxidation stability of aluminum in LiN(SO2CF3)(2)-containing electrolytes depended strongly on the solvent structure. The ether solvents such as tetrahydrofuran (THF) and dimethoxyethane (DME) were effective in preventing aluminum corrosion due to their low dielectric constants. Furthermore, LiN(SO2C2F5)(2) salt with a larger anion than that of LIN(SO2CF3)(2) was evaluated and good oxidation stability of waluminum was obtained regardless of the kind of solvents. (C) 2000 Elsevier Science Ltd. All rights reserved.

Keywords

lithium rechargeable batteries; lithium imide solutes; aluminum cathode current collector; corrosion inhibition