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

Title
Microstructural change of 2LiBH4/Al with hydrogen sorption cycling: Separation of Al and B
Authors
김지우Oliver Friedrichs안재평김도현김슬참Arndt Remhof정희석이제현심재혁조영환Andreas Zuttel오규환
Keywords
Hydrogen storage; Complex metal hydride; LiBH4; Destabilization; Composite; Microstructure; Transmisson electron microscopy; Focused ion beam; hydrides; focused ion beam
Issue Date
2009-06
Publisher
Scripta materialia
Citation
VOL 60, NO 12, 1089-1092
Abstract
Using transmission electron microscopy, microstructures of 2LiBH4/Al are investigated during the hydrogen cycling (2LiBH4+ AlM 2LiH + AlB2 + 3H2). Mechanically, ball milled 2LiH/AlB2 mixture shows a homogeneous phase distribution. For the hydrogen absorption, the decomposition of AlB2 and the formation of 2LiBH4 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.
URI
http://pubs.kist.re.kr/handle/201004/35055
ISSN
1359-6462
Appears in Collections:
KIST Publication > Article
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