Microstructural change of 2LiBH4/Al with hydrogen sorption cycling: Separation of Al and B

被引：25

作者：

Kim, Ji Woo ^{[1
,2
]}

Friedrichs, Oliver ^{[1
]}

Ahn, Jae-Pyoung ^{[3
]}

Kim, Do Hyun ^{[2
]}

Kim, Seul Cham ^{[2
]}

Remhof, Arndt ^{[1
]}

Chung, Hee-Suk ^{[2
]}

Lee, Jehyun ^{[2
]}

Shim, Jae-Hyeok ^{[4
]}

Cho, Young Whan ^{[4
]}

Zuettel, Andreas ^{[1
]}

Oh, Kyu Hwan ^{[2
]}

机构：

[1] Empa Mat Sci & Technol, Dept Environm Energy & Mobil, Div Hydrogen & Energy, CH-8600 Dubendorf, Switzerland

[2] Seoul Natl Univ, Dept Mat Sci & Engn, Seoul 151742, South Korea

[3] Korea Inst Sci & Technol, Adv Anal Ctr, Seoul 136791, South Korea

[4] Korea Inst Sci & Technol, Mat Sci & Technol Res Div, Seoul 136791, South Korea

来源：

SCRIPTA MATERIALIA | 2009年 / 60卷 / 12期

关键词：

Hydrogen storage; Hydrides; Microstructure; Transmission electron microscopy; Focused ion beam; ELECTRON-MICROSCOPY; SODIUM ALANATE; STORAGE; LIBH4; COMPOSITES; TI; MGH2;

D O I：

10.1016/j.scriptamat.2009.01.031

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Using transmission electron microscopy, microstructures of 2LiBH(4)/Al are investigated during the hydrogen cycling (2LiBH(4) + Al <-> 2LiH + AlB2 + 3H(2)). Mechanically, ball milled 2LiH/AlB2 mixture shows a homogeneous phase distribution. For the hydrogen absorption, the decomposition of AlB2 and the formation of 2LiBH(4) occur simultaneously. During the hydrogen cycling, the incomplete formation of AlB2 results in a spatial separation of Al and B. A lack of reactive B from AlB2 results in a limited formation of LiBH4, which leads to the capacity loss of the system. (C) 2009 Published by Elsevier Ltd. on behalf of Acta Materialia Inc.

引用

页码：1089 / 1092

页数：4

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