Hydrogen storage properties of the TiVNbM (M = Cr, Co e Ni) multicomponent alloys

• Grant number: 20/07707-6
• Support Opportunities: Scholarships in Brazil - Doctorate
• Start date: December 01, 2020
• End date: May 31, 2023
• Field of knowledge: Engineering - Materials and Metallurgical Engineering - Physical Metallurgy
• Principal Investigator: Guilherme Zepon
• Grantee: Bruno Hessel Silva
• Host Institution: Centro de Ciências Exatas e de Tecnologia (CCET). Universidade Federal de São Carlos (UFSCAR). São Carlos , SP, Brazil

Abstract

Hydrogen as an energy carrier for renewable energy sources (as in eolic or solar energy) brings several social, economical and environmental benefits. However, hydrogen storage is one key factor that still demands substantial efforts in research, determining suitable methods for mobile and stationary applications. Solid state storage using metallic hydrides is a safe method with high hydrogen volumetric densities that have brought attention from the scientific community. Recently, novel groups of alloys so-called multicomponent alloys, high entropy alloys and complex concentrated alloys have shown potential to exhibit disruptive mechanical and functional properties. Some interesting results on hydrogen storage capacity and crystalline structural changes during hydride formation have already been reported. Parameters as cell structure distortion and valence electron concentration have been suggested to have effect on hydrogen sorption properties. However, the reduced number of studies in the different properties required for possible applications and the unclear hydrogen sorption mechanisms remain as significant challenges in this research field. In this context, the aim of this project is to investigate hydrogen storage properties of multicomponent alloys from the system TiVNbM, (M = Cr, Co and Ni). Maximal hydrogen storage capacity, sorption kinetic behavior, cycling stability and thermodynamic properties of hydrides formation will be the evaluated in this work. Nonetheless, it is expected to have a better understanding of the sorption mechanisms in these alloys and propose a new strategy to design metallic alloys for hydrogen storage based in kinetics and thermodynamic factors. (AU)

Scientific publications

(References retrieved automatically from Web of Science and SciELO through information on FAPESP grants and their corresponding numbers as mentioned in the publications by the authors)

SILVA, BRUNO HESSEL; ZLOTEA, CLAUDIA; VAUGHAN, GAVIN; CHAMPION, YANNICK; BOTTA, WALTER JOSE; ZEPON, GUILHERME. ydrogen absorption/desorption reactions of the (TiVNb)(85)Cr-15 multicomponent allo. Journal of Alloys and Compounds, v. 901, APR 25 2022. (20/07707-6)

SILVA, BRUNO HESSEL; ZLOTEA, CLAUDIA; CHAMPION, YANNICK; BOTTA, WALTER JOSE; ZEPON, GUILHERME. Design of TiVNb-(Cr, Ni or Co) multicomponent alloys with the same valence electron concentration for hydrogen storage. Journal of Alloys and Compounds, v. 865, JUN 5 2021. (20/07707-6)