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Hydrogen storage in the (TiNb)(CrMnFe)2 multicomponent alloy with C14-type Laves phase structure

Grant number: 21/00912-6
Support type:Scholarships in Brazil - Master
Effective date (Start): October 01, 2021
Effective date (End): February 28, 2023
Field of knowledge:Engineering - Materials and Metallurgical Engineering - Physical Metallurgy
Principal researcher:Guilherme Zepon
Grantee:Vinícius Aranda
Home Institution: Centro de Ciências Exatas e de Tecnologia (CCET). Universidade Federal de São Carlos (UFSCAR). São Carlos , SP, Brazil

Abstract

Hydrogen plays a central role in the storage and transport of renewable energy. Although hydrogen is an energetic vector, its storage is the main challenge to be overcome due to its low density. Metal hydrides are strategic materials that can lead to the deployment of hydrogen-based energy in our society. They can be applied in solid-state storage tanks improving the volumetric density of hydrogen energy as well as in Ni-metal hydride batteries. Since the hydrogen storage properties of metal alloys are intrinsically related with its chemical composition, high entropy alloys or multicomponent alloys that can form metal hydrides have been calling the attention of researchers. Due to the wide composition field of multicomponent alloys, engineers and materials scientists can project and discover alloy with optimized properties for any specific application. In this context, this master's project aims to produce, characterize, and evaluate the hydrogen storage properties of the (TiNb)(CrMnFe)2 alloy, which has its composition derived from the TiZrCrMnFeNi alloy reported in the literature with promising properties. Preliminary results of computational thermodynamics show that the (TiNb)(CrMnFe)2 alloy has a great tendency to form a single-phase structure of C14-type Laves phase. Both the hydrogen storage properties through the solid-gas reactions, which occur in solid-state tank applications, and through the electrochemical reaction in alkaline aqueous solution, which occur in batteries, will be evaluated.

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