Study of the Cu–Li–Mg–H system by thermal analysis

• Tipo: Artigo em Revista Científica Internacional
• Data: 2012

Autores

M. H. Braga (Autor) FEUP; J. A. Ferreira (Autor) FEUP; M. Wolverton (Autor) FEUP

Revista

Título: Journal of Thermal Analysis and Calorimetry

Vol. 108 Nº 2

Páginas: 733-739

ISSN: 1388-6150

Editora: Springer Nature

Indexação

ISI Web of Knowledge - 2 Citações

ISI Web of Science

Scopus - 4 Citações

COMPENDEX

Classificação Científica

FOS: Ciências da engenharia e tecnologias > Outras ciências da engenharia e tecnologias

CORDIS: Ciências Físicas

Outras Informações

ID Authenticus: P-002-AVF

DOI: 10.1007/s10973-011-2126-0

Abstract (EN): Finite fossil-fuel supplies, nuclear waste and global warming linked to CO2 emissions have made the development of alternative/'green' methods of energy production, conversion and storage popular topics in today's energy-conscious society. These crucial environmental issues, together with the rapid advance and eagerness from the electric automotive industry have combined to make the development of radically improved energy storage systems a worldwide imperative. CuMg2 has an orthorhombic crystal structure and does not form a hydride: it reacts reversibly with hydrogen to produce Cu2Mg and MgH2. However, CuLixMg2-x (x = 0.08) has a hexagonal crystal structure, just like NiMg2, a compound known for its hydrogen storage properties. NiMg2 absorbs up to 3.6 wt% of H. Our studies showed that not only CuLixMg2-x absorbs a considerable amount of hydrogen, but also starts releasing it at a temperature in the range of 40-130 degrees C. In order to determine the properties of the hydrogenated CuLixMg2-x, absorption-desorption, Differential scanning calorimeter and thermo-gravimetric experiments were performed. Neutron spectra were collected to elucidate the behavior of hydrogen in the Li-doped CuMg2 intermetallic. Using DFT calculations we were able to determine the best value for x in CuLixMg2-x and compare different possible structures for the CuLixMg2-x hydride.

Idioma: Inglês

Tipo (Avaliação Docente): Científica

Notas: This paper was published twice: as conference proceedings and as paper.