Hydrogen Sorption in Li12C60

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• 作者：Philippe Mauron ; Mattia Gaboardi ; Arndt Remhof ; Andreas Bliersbach ; Denis Sheptyakov ; Matteo Aramini ; Gina Vlahopoulou ; Fabio Giglio ; Daniele Pontiroli ; Mauro Ricc貌 ; Andreas Z眉ttel
• 刊名：Journal of Physical Chemistry C
• 出版年：2013
• 出版时间：November 7, 2013
• 年：2013
• 卷：117
• 期：44
• 页码：22598-22602
• 全文大小：316K
• 年卷期：v.117,no.44(November 7, 2013)
• ISSN：1932-7455

文摘

The lithium-intercalated fulleride Li₁₂C₆₀ was investigated in view of a lightweight hydrogen storage material due to the low molecular weight of its constituents. Deuterium (D₂) absorption in Li₁₂C₆₀ shows an uptake of up to 9.5 mass % D₂ (equivalent to 5 mass % H₂ for the same stoichiometry). Under a pressure of 190 bar the onset of absorption was observed at a temperature below 100 掳C, which is 200 掳C lower than that for pure C₆₀. Deuterium desorption was investigated by in-situ neutron powder diffraction, and at a pressure of 1 bar desorption was observed above 300 掳C. The ab/desorption is accompanied by a partial de/reintercalation of lithium, observed by the appearance and disappearance of LiD reflections after absorption and during desorption, respectively. A minor part of deuterium is present in ionic form in LiD, and the major part is covalently bound in a Li-depleted compound Li_12鈥?i>xC₆₀D_36+y.