Hydrogen storage properties of lithium silicon alloy synthesized by mechanical alloying

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 d...

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Bibliographic Details
Published in:Journal of power sources 2011, Vol.196 (1), p.504-507
Main Authors: Doi, Koichi, Hino, Satoshi, Miyaoka, Hiroki, Ichikawa, Takayuki, Kojima, Yoshitsugu
Format: Article
Language:English
Subjects:
Absorption
Alloy systems
Alternative fuels. Production and utilization
Applied sciences
Direct energy conversion and energy accumulation
Electrical engineering. Electrical power engineering
Electrical power engineering
Electrochemical conversion: primary and secondary batteries, fuel cells
Electrode materials
Energy
Exact sciences and technology
Fuels
Hydrogen
Hydrogen storage
Light elements
Lithium
Lithium ion battery
Mechanical alloying
Negative electrode
Silicon base alloys
Stores
Thermodynamics
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Summary: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 °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.
ISSN:0378-7753
1873-2755
DOI:10.1016/j.jpowsour.2010.05.070