Surface passivation of metal hydrides for applications

被引：7

作者：

Suda, S ^{[1
]}

Li, ZP ^{[1
]}

Sun, YM ^{[1
]}

Liu, BH ^{[1
]}

Gao, XP ^{[1
]}

机构：

[1] Kogakuin Univ, Dept Environm Chem & Engn, Hachioji, Tokyo 1920015, Japan

来源：

HYDROGEN IN SEMICONDUCTORS AND METALS | 1998年 / 513卷

关键词：

D O I：

10.1557/PROC-513-25

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Properties and characteristics of hydriding alloys are strongly dependent on surface compositions and morphologies. For instance, oxides such as La2O3 on AB(5) alloys and ZrO2 on AB(2), AB, and body-centered-cubic (BCC) alloys act as the barriers for the conversion of molecular and ionic hydrogen to atomic hydrogen at the surface, thus reducing the kinetics in both the gas-solid and electrochemical reactions. Alloy surfaces chemically treated by an aqueous F--ion containing solution have been developed to solve such problems. F-treated surfaces exhibit significantly improved characteristics in regard to the hydrogen uptakes and the protection against impurities and electrolyte solution. In addition, highly conductive metallic Ni layers can be formed on the surface of the alloy particles by the fluorination. The authors report the properties and characteristics of fluorinated hydriding alloys, mainly of a typical AB(2) Laves phase material which represents the difficult activation characteristics and poor long-term durability during electrochemical charge/discharge cycles.

引用

页码：25 / 36

页数：12