Cho, In Hwa Gang, Seunggi Choi, Yong Nam Lee, Heeju Park, Mirae Shim, Jae-Hyeok Noh, Do Young 2024-01-19T19:00:17Z 2024-01-19T19:00:17Z 2021-09-05 2019-11-05 0925-8388 https://pubs.kist.re.kr/handle/201004/119337 We found abnormal lattice behavior of MgH2 in LiBD4-MgH2 composites at the melting of LiBD4 using high resolution x-ray diffraction measurements. At the LiBD4 melting point, the tetragonal MgH2 unit cell contracted isotropically which is attributed to D atoms diffused from neighboring LiBD4; these D atoms can occupy interstitals or lattice points of MgH2. Endothermic behavior of LiBD4 during melting might also have contriubuted to the contraction of MgH2. In addition, the intensity of MgH(D)(2) Bragg peaks measured in in situ neutron diffraction experiment confirms that H/D exchange between the two hydrides starts below the LiBD4 melting temperature. (C) 2019 Elsevier B.V. All rights reserved. English ELSEVIER SCIENCE SA HYDROGEN-STORAGE MATERIALS LIBH4 EXCHANGE HYDRIDE STOICHIOMETRY DYNAMICS KINETICS PHASE Abnormal lattice behavior of MgH2 in isotope labeled LiBD4-MgH2 composites at the melting of LiBD4 Article 10.1016/j.jallcom.2019.07.352 1 JOURNAL OF ALLOYS AND COMPOUNDS, v.808 JOURNAL OF ALLOYS AND COMPOUNDS 808 scie scopus 000483694900002 2-s2.0-85070574089 Chemistry, Physical Materials Science, Multidisciplinary Metallurgy & Metallurgical Engineering Chemistry Materials Science Metallurgy & Metallurgical Engineering Article HYDROGEN-STORAGE MATERIALS LIBH4 EXCHANGE HYDRIDE STOICHIOMETRY DYNAMICS KINETICS PHASE LiBH4-MgH2 composite Hydrogen storage In situ x-ray diffraction In situ neutron diffraction