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- Title
Anode properties of AlO-added MgH for all-solid-state lithium-ion batteries.
- Authors
Ikeda, Suguru; Ichikawa, Takayuki; Goshome, Kiyotaka; Yamaguchi, Shotaro; Miyaoka, Hiroki; Kojima, Yoshitsugu
- Abstract
All-solid-state lithium-ion batteries (LIBs) with aluminum oxide (AlO)-added magnesium hydride (MgH), (100 − y)MgH- yAlO ( y = 1, 5, 25 mol%) were fabricated, and their anode properties were investigated. Coulombic efficiency is increased by adding AlO. In addition, cycle properties are improved by adding AlO as well. Al-magic angle spinning (MAS) nuclear magnetic resonance (NMR) and some other analyses were carried out to approach the mechanism of this additive, by which the coulombic efficiency and the cycle properties were improved. Although the niobium oxide (NbO)-added MgH also showed the better kinetic properties compared with pristine MgH in our previous report, NbO should be well known as the best catalyst for hydrogen ab/desorption properties of MgH. However, it is revealed that the hydrogen desorption temperature does not depend on AlO contents. According to some detailed analyses, pentahedral-coordinated aluminum atom was successfully observed after Li insertion reaction by Al MAS NMR measurement. From the other experimental results, it is concluded that this pentahedral-coordinated aluminum atom could play an important role on the increasing coulombic efficiency and cycle properties.
- Subjects
LITHIUM-ion batteries; LITHIUM ions; ALKALI metal ions; NUCLEAR magnetic resonance; ALUMINUM oxide
- Publication
Journal of Solid State Electrochemistry, 2015, Vol 19, Issue 12, p3639
- ISSN
1432-8488
- Publication type
Article
- DOI
10.1007/s10008-015-2959-8