Hydrogen storage properties of lithium silicon alloy synthesized by mechanical alloying

JOURNAL OF POWER SOURCES

卷:196

Article

Doi, Koichi²  Hino, Satoshi¹  Miyaoka, Hiroki¹  Ichikawa, Takayuki^1,2  Kojima, Yoshitsugu^1,2 

[1] Hiroshima Univ, Inst Adv Mat Res, Higashihiroshima 7398530, Japan

[2] Hiroshima Univ, Grad Sch Adv Sci Matter, Higashihiroshima 7398530, Japan

关键词: Hydrogen storage;    Mechanical alloying;    Thermodynamics;    Light elements;    Lithium ion battery;    Negative electrode;   

DOI  :  10.1016/j.jpowsour.2010.05.070

来源: Elsevier

【 摘 要 】

A lithium silicon alloy was synthesized by mechanical alloying method. Hydrogen storage properties of this Li-Si-H system were studied. During hydrogenation of the lithium silicon alloy, lithium atom was extracted from the alloy and lithium hydride was generated. Equilibrium hydrogen pressures for desorption and absorption reactions were measured in a temperature range from 400 to 500 degrees C to investigate the thermodynamic characteristics of the system, which can reversibly store 5.4 mass% hydrogen with smaller reaction enthalpy than simple metal Li. Li absorbing alloys, which have been widely studied as a negative electrode material for Li ion rechargeable batteries, can be used as hydrogen storage materials with high hydrogen capacity. (C) 2010 Elsevier B.V. All rights reserved.

【 授权许可】

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