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Title: リチウム水素化物を添加し不安定化処理した水素吸蔵黒鉛の水素貯蔵特性
Other Titles: Hydrogen storage properties of hydrogenated graphite destabilized by mixing with lithium hydride
Authors: 宮岡, 裕樹1 Browse this author
礒部, 繁人2 Browse this author →KAKEN DB
市川, 貴之3 Browse this author
藤井, 博信4 Browse this author
Authors(alt): Miyaoka, Hiroki1
Isobe, Shigehito2
Ichikawa, Takayuki3
Fujii, Hironobu4
Keywords: Hydrogen storage material
Mechanical milling
Gas desorption properties
Issue Date: 15-Jan-2007
Publisher: 炭素材料学会
Journal Title: 炭素
Journal Title(alt): TANSO
Volume: 2007
Issue: 226
Start Page: 2
End Page: 7
Publisher DOI: 10.7209/tanso.2007.2
Abstract: Hydrogen storage properties of the ball-milled mixtures composed of hydrogenated nano-structural graphite (CnanoHx) and lithium hydride (LiH) were examined from thermodynamic and structural points of view, where the CnanoHx was synthesized by ball-milling graphite powder under hydrogen atmosphere. Since hydrogen atoms in the CnanoHx and LiH are strongly bonded with each host atom, heating up to >600°C is necessary to release hydrogen from each solid product. The CnanoHx and LiH composites desorbed hydrogen and hydrocarbon gases below 400°C with about 9.4 mass% weight loss. The 2: 1 composite of the CnanoHx and LiH reversibly stored hydrogen with an effective capacity of about 4.5 mass % at 350°C. No evident peaks were observed in XRD profiles after the dehydrogenation, indicating that the nano-structural feature remained after dehydrogenation due to formation of (CLi) nano clusters. However, only the LiH phase was crystallized after rehydrogenation at 350°C. From these results, it is concluded that hydrogen in the composites is destabilized by a novel interaction between the CnanoHx and LiH in a nanometer scale, and is desorbed at lower temperatures than each of the components. Therefore, this Li-C-H system can be recognized to be a new family of hydrogen storage materials.
Rights: 著作権は炭素材料学会にある。利用は著作権の範囲内に限られる。
Type: article
Appears in Collections:工学院・工学研究院 (Graduate School of Engineering / Faculty of Engineering) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

Submitter: 礒部 繁人

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