a5b19 type gadolinium-containing hydrogen storage alloy, negative electrode and preparation method

Abstract

The invention discloses a 5 B 19 Type hydrogen storage alloy, negative electrode and preparation method. The composition formula of the hydrogen storage alloy is RE u Gd v Ni w‑a‑b‑ c mn a al b m c ; RE is selected from one or more of rare earth metal elements, except Gd; M is selected from one or more of Zn, V, W, Cu, Fe, Sn, Cr, Mo and Si elements; u, v, w, a, b, c respectively represent the mole fraction of each element; u>0, v>0.1, u+v=3; 13>w≥11, 4≥a+b>0, 2≥c≥0 . The invention improves the maximum discharge capacity of the hydrogen storage alloy and prolongs the service life of the hydrogen storage alloy.

Description

technical field

[0001] The present invention relates to a 5 B 19 Type hydrogen storage alloy, negative electrode and preparation method. Background technique

[0002] As a green energy for global energy transformation and upgrading, hydrogen energy is gradually becoming the protagonist of the energy market. Hydrogen storage alloys are a class of functional materials with high hydrogen storage density discovered in the late 1960s. As an important energy storage and conversion material, rare earth hydrogen storage alloys react with hydrogen to form metal hydrides, which can absorb and desorb a large amount of hydrogen under specific temperature and pressure conditions, and have fast hydrogen absorption / desorption reactions and excellent reversibility. Large-scale development and utilization of hydrogen energy. Rare earth hydrogen storage alloys have excellent kinetic and electrochemical properties, and are usually used as anode materials for nickel-metal hydride (MH-Ni) se...

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