What is it about?

The chemical storage of hydrogen in solid state of metal hydrides is the safest method for stationary and portable applications since these can be functioned at lower pressure and ambient temperature. Among the desirable metal hydrides, the intermetallic compound TiFe of cubic CsCl-type structure is well-known for absorbing hydrogen reversibly up to 1.9 wt.% to form β-FeTiH and γ-FeTiH2 phases. In the present review article, we have discussed the historic background outlining the recent developments on the microstructural modifications, activation kinetics and processing routes of TiFe intermetallic alloys towards the improvement of hydrogenation properties.

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Why is it important?

The focus of this article is to present the basic knowledge and recent developments on TiFe intermetallic alloys for future hydrogen storage applications which will be beneficial to researchers and practitioners in the field of interest.


Hydrogen energy is a potential alternative of fossil fuels (petroleum and natural gas) based energy systems as hydrogen is environmentally benign by releasing only water vapour as combustion product, readily available in nature, a light element, a carrier of energy due to its portability and generated highest heat of combustion. An overview has been presented on TiFe intermetallic alloys as an exciting research field of Ti-based materials for future stationary and portable solid-state hydrogen storage applications due to its high volumetric capacity and moderate operating conditions. The current trend of research interests on TiFe based alloys is mainly driven by the improvement of its hydrogenation kinetics through engineering the matrix structure and innovative processing routes. Thus, this review article holds the fundamental understanding of TiFe alloys in terms of microstructure, hydride phase formation and hydrogenation, and also includes the recent developments on TiFe intermetallic alloys to ease activation process towards hydrogenation. With the technological advancement and continuous research efforts, solid-state hydrogen storage systems may replace the industrially successful storage mediums due to safety features and low cost in future. This clearly indicates the benefits and relevance of the present article to all researchers and practitioners in the field of interest.

G.K. Sujan
University of Wollongong

Read the Original

This page is a summary of: An overview on TiFe intermetallic for solid-state hydrogen storage: microstructure, hydrogenation and fabrication processes, Critical Reviews in Solid State and Material Sciences, August 2019, Taylor & Francis, DOI: 10.1080/10408436.2019.1652143.
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