Crystal Structural Investigations for Understanding the Hydrogen Storage Properties of YMgNi₄-Based Alloys.

ABSTRACT: The hydrogen storage properties and crystal structures of YMgNi₄-based alloys, which were synthesized from (2 - x)YNi₂ and xMgNi₂ (0.6 ≤ x ≤ 1.2), were investigated by pressure-composition-temperature measurements and powder neutron diffraction at a deuterium gas pressure to understand the hydrogen absorption and desorption reactions viewed from atomic arrangements around H atoms. Reducing the amounts of MgNi₂, which was utilized as a Mg source in YMgNi₄-based alloys, has been observed to lower the hydrogen absorption and desorption pressures and increase the hydrogen storage capacities. However, the reversible hydrogen capacity attained a maximum value of 1.2 mass % at x = 0.8 because of the formation of a

SUBMITTER: Sato T 

PROVIDER: S-EPMC7726944 | biostudies-literature | 2020 Dec

REPOSITORIES: biostudies-literature