H-Sorption properties of MgH2-based nanocomposites prepared by cold forging

• Grant number: 12/05245-9
• Support Opportunities: Scholarships abroad - Research Internship - Scientific Initiation
• Start date: August 01, 2012
• End date: October 31, 2012
• Field of knowledge: Engineering - Materials and Metallurgical Engineering - Physical Metallurgy
• Principal Investigator: Tomaz Toshimi Ishikawa
• Grantee: Gustavo Henrique Cozentino
• Supervisor: Jacques Huot
• Host Institution: Centro de Ciências Exatas e de Tecnologia (CCET). Universidade Federal de São Carlos (UFSCAR). São Carlos , SP, Brazil
• Institution abroad: Université du Québec à Trois-Rivières (UQTR), Canada
• Associated to the scholarship: 11/21222-6 - MgH2 based nanocomposites prepared by cold forging, BP.IC

Abstract

The magnesium hydride stands out as a means of store hydrogen in solid form because it has low cost and at the same time, high volumetric energy density (1.5 to 1.6 kWh/l). However, the technological application of this material has been frustrated by the need for high temperatures of hydrogen absorption and desorption and the slow kinetics with which these processes occur. Alloys and composites based on nanocrystalline Mg appear as promising alternative to overcome these problems. In this project, we propose the evaluation of hydrogen storage Properties of MgH2-based nanocomposites containing Fe or Nb additions, innovative routes prepared by Cold Forging (CF) and a combination of CF and milling high energy (HEBM, High-energy Ball Milling), held for short times. The samples have a low specific surface area, and therefore higher resistance to air, but with finer microstructure. The samples have a low specific surface area, and therefore higher resistance to air, but with finer microstructure. Combining the results of its storage properties (to be obtained in IRH-UQTR), with the results obtained by different techniques of structural characterization, and X-ray diffraction, scanning electron microscopy and transmission (which are obtained in DEMa-UFSCar), allow a full assessment of the effects of processing and properties of different compositions in storage reached. Thus will be established correlations between structure, processing and properties of materials obtained in order for hydrogen storage applications. (AU)