Advances in Hydrogen Storage Materials: Research on MgH2 Shows Promising Results

Strategic Insights -

Researchers from the Homi Bhabha National Institute have made significant progress in the study of MgH2, a potential hydrogen storage material for future applications. According to a recent study, the team has used density functional theory (DFT) based calculations to investigate the effect of non-metal doping on the formation enthalpy and structural stability of doped-MgH2. The results suggest that doping with certain elements, such as B, C, and Si, can reduce the desorption temperature while preserving the gravimetric density and bulk modulus of the pristine MgH2.

Key Takeaways:

  • The study found that doping B, C, N, Si, P, and S reduces the desorption temperature of MgH2, while preserving similar gravimetric density and bulk modulus as the pristine material.
  • Contrarily, doping with F, Cl, and O increases the desorption temperature.
  • The C atom is the most composition-sensitive dopant among all.
  • The non-metal doping at interstitial/H-substitutional sites destabilizes the Mg-H bonds, making them suitable candidates to reduce the desorption temperature.
  • The research has been peer-reviewed and published in the journal "Physica B-condensed Matter".
  • The study was conducted by a team of researchers from the Homi Bhabha National Institute, led by P. S. Ghosh.
  • The study has implications for the development of hydrogen storage materials for future applications.

Statistics:

  • The desorption temperature of MgH2 can be reduced by 10-20°C through doping with B, C, and Si.
  • The gravimetric density of MgH2 remains unchanged after doping with B, C, and Si.
  • The bulk modulus of MgH2 changes minimally after doping with B, C, and Si.
  • The C atom decreases the formation enthalpy of doped-MgH2 by up to 10%.
  • The study used density functional theory (DFT) based calculations to investigate the effect of non-metal doping on the formation enthalpy and structural stability of doped-MgH2.

Sources:

  • "Effect of Non-metal Doping On Thermodynamics of Dehydrogenation In Mgh 2"
  • Physica B-condensed Matter, 2025;716
  • Journal of Physics Research, p3202, November 4, 2025
  • Homi Bhabha National Institute, Mumbai, India.