Preparation of graphite supported Li–N–H hydrogen storage material from Li-graphite intercalation compound and their unique hydrogen release property

• Published in: International journal of hydrogen energy Vol. 36; no. 11; pp. 6751 - 6755
• Main Authors: Yoshida, Akihiro, Yoshimura, Hana, Terada, Tomoyuki, Nakayama, Yasuyuki, Kuno, Hiroki, Miyao, Toshihiro, Naito, Shuichi
• Format: Journal Article
• Language: English
• Published: Kidlington Elsevier Ltd 01.05.2011; Elsevier
• Subjects: Alternative fuels. Production and utilization; Ammonia; Applied sciences; Durability; Energy; Exact sciences and technology; Fuels; Graphite; Hydrogen; Hydrogen storage; Hydrogen storage materials; Intercalation compounds; Li-graphite intercalation compound; Lithium; Lithium nitride; Spectra; Li-graphite intercalation compound; Hydrogen storage; Lithium nitride; Intercalation compound; Ammonia; Hydrogen; Preparation; Graphite; Durability; Lithium; Nuclear magnetic resonance; X ray diffractometry
• ISSN: 0360-3199; 1879-3487
• DOI: 10.1016/j.ijhydene.2011.02.140

A highly dispersed Li–N–H hydrogen storage material supported on graphite was prepared from a Li-graphite intercalation compound with ammonia, and their hydrogen release property was investigated. In addition, the changes of the chemical state of the lithium species responsible for hydrogen storage/release were investigated using 7Li NMR and XRD. Those spectral analyses revealed that the graphite supported Li–N–H hydrogen storage material released hydrogen at lower temperature than in the absence of graphite support and Li 3N was directly formed in one single step without going through the formation of Li 2NH. Also we found that durability to hydrogen storage/release cycles was improved in the presence of graphite support.