High-entropy doped hydrogen storage alloy and preparation method thereof

Abstract

The invention belongs to the technical field of hydrogen storage alloys, and particularly relates to a high-entropy doped hydrogen storage alloy and a preparation method thereof. The chemical general formula of the high-entropy doped hydrogen storage alloy is TiCr (1.2-x) Vy (HEA) x, wherein x is more than 0 and less than or equal to 0.2, y is more than or equal to 0.5 and less than or equal to 0.8, and HEA (High-entropy alloy) is a high-entropy alloy. The high-entropy doped hydrogen storage alloy provided by the invention is obtained by doping a high-entropy alloy into a Ti-Cr-V-based hydrogen storage alloy and modifying the Ti-Cr-V-based hydrogen storage alloy. Through the synergistic effect of metal elements in the high-entropy alloy, multiple factors such as the crystal structure, the electronic structure and the bulk modulus of the high-entropy doped hydrogen storage alloy are changed, the thermodynamic property of the hydrogen absorption and desorption reaction of the high-entropy doped hydrogen storage alloy is improved, and the hydrogen absorption and desorption platform and the effective dehydrogenation capacity are improved. 本申请属于储氢合金技术领域，尤其涉及一种高熵掺杂储氢合金及其制备方法。其中，所述高熵掺杂储氢合金的化学通式为：TiCr<subgt;(1.2‑x)</subgt;V<subgt;y</subgt;(HEA)<subgt;x</subgt;；其中，0＜x≤0.2，0.5≤y≤0.8，HEA(High‑entropy alloy)为高熵合金。本申请提供的所述高熵掺杂储氢合金是往Ti‑Cr‑V基储氢合金中掺杂高熵合金进行改性得到的。通过高熵合金中各金属元素之间的协同效应，改变所述高熵掺杂储氢合金的晶体结构、电子结构、体模量等多重因素，改善所述高熵掺杂储氢合金的吸放氢反应的热力学性能，提高吸放氢平台和有效脱氢容量。