New kinetic insight into the spontaneous oxidation process of lithiumin air by EPMA

被引：4

作者：

Otero, Manuel ^{[1
,2
]}

Lener, German ^{[3
]}

Trincavelli, Jorge ^{[1
]}

Barraco, Daniel ^{[1
]}

Sandro Nazzarro, Marcelo ^{[3
]}

Furlong, Octavio ^{[3
]}

Marcos Leiva, Ezequiel Pedro ^{[2
]}

机构：

[1] Univ Nacl Cordoba, Fac Matemat Astron & Fis, IFEG, RA-5000 Cordoba, Argentina

[2] Univ Nacl Cordoba, Fac Ciencias Quim, Dept Matemat & Fis, INFICQ, RA-5000 Cordoba, Argentina

[3] Univ Nacl San Luis, Fac Ciencias Fis Matemat & Nat, INFAP, San Luis, Argentina

来源：

APPLIED SURFACE SCIENCE | 2016年 / 383卷

关键词：

Lithium corrosion; Electron Probe Micro-Analysis; Oxide growth kinetics; CORROSION; XPS;

D O I：

10.1016/j.apsusc.2016.04.060

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

The exposure of metallic lithium to ambient air produces a fast corrosion reaction of the surface that continues to the bulk of the material. This spontaneous process was explored by means of X-ray Photoelectron Spectroscopy (XPS) and Electron Probe Micro-Analysis (EPMA). The combination of these techniques and Monte Carlo simulations allowed observing the formation of a film of lithium hydroxide (LiOH) and studying the growth within the material during the first 300 s. The corrosion is mainly due to the reaction of lithium with water and the diffusion of water through the growing LiOH film is the rate determining step. On the basis of a kinetic analysis we studied the mechanism of reaction and inferred a diffusion coefficient of D=(5.1 +/- 0.4) x 10(-12) cm(2)/s in agreement with results from the literature obtained using different techniques. (C) 2016 Elsevier B.V. All rights reserved.

引用

页码：64 / 70

页数：7

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