Microstructural change of 2LiBH(4)/Al with hydrogen sorption cycling: Separation of Al and B

作者：Kim Ji Woo; Friedrichs Oliver; Ahn Jae Pyoung; Kim Do Hyun; Kim Seul Cham; Remhof Arndt; Chung Hee Suk; Lee Jehyun; Shim Jae Hyeok; Cho Young Whan; Zuettel Andreas; Oh Kyu Hwan

来源：Scripta Materialia, 2009, 60(12): 1089-1092.

DOI：10.1016/j.scriptamat.2009.01.031

• Hydrogen storage
• Hydrides
• Microstructure
• Transmission electron microscopy
• Focused ion beam

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.

• 出版日期2009-6