Method of producing hydrogen-storage alloy by discharge plasma sintering technique

Abstract

The invention relates the method for preparing store of hydrogen alloy with discharging plasma agglutination technology. The method comprises the following steps: mixing the LaNi3 powder, Mg powder and Ni powder, whose purity is 99.9% and coarseness is above 200mesh; putting them into SPS special die to press model; discharging plasma clinkering the die at vacuum, the heating speed being 50-150Deg / min, the temperature being 300-1000Deg.C, the pressure being 5-30MPa, the thermal insulation time being 3-15 min, cooling, and getting the product. The store of hydrogen alloy has long life and good activation energy.

Description

technical field [0001] The invention belongs to the field of metal functional materials and secondary batteries, and in particular provides a method for preparing a hydrogen storage alloy by using discharge plasma sintering technology. Background technique [0002] With the growth of population and the general improvement of human material and cultural level, people's demand for energy is also increasing rapidly. However, the reserves of fossil raw materials are limited and non-renewable. More importantly, the pollution to the environment is increasing. Seriously, so the traditional energy strategy is severely tested. Therefore, governments of various countries vigorously develop clean new energy sources to alleviate the increasingly severe energy crisis and protect living conditions. [0003] Hydrogen energy is favored by people because it is an environmentally friendly energy source, but the storage of hydrogen is the bottleneck of the development of hydrogen economy. Amon...

AI Technical Summary

Problems solved by technology

However, this method does not solve the main problem of poor cycle stability of Mg-based alloys; China's No. 00123177.4 invention patent application uses induction melting to prepare Mm 1-x-y-z La x PryNd z Ni a co b MnAl d m e Alloy, where Mm is mixed rare earth metal; China No. 200510033055.3 invention patent application for the preparation of REMg by ordinary sintering method 3 Type hydrogen storage alloy; China Patent No. 94113952.2 has applied for the preparation of magnesium-based hydrogen storage alloy electrode by mechanical alloying method

The smelting method to prepare hydrogen storage alloys is difficult to operate and the repeatability is not good; the preparation of hydrogen storage alloys by ordinary sintering and mechanical alloying methods is time-consuming and difficult to produce in large quantities

Images