稀土改性TiZrMnCr(V-Fe)储氢合金及百千瓦时级固态储氢系统应用研究

Rare-Earth-Modified TiZrMnCr(V-Fe) Hydrogen Storage Alloy and Its Application in Hundred-Kilowatt-Hour Scale Solid-State Hydrogen Storage System

摘要:

系统性研究了Ti_0.8Zr_0.2Mn_1.2Cr_0.6(V-Fe)_0.2合金储氢性能及其稀土改性作用，结果表明Ti_0.8Zr_0.2Mn_1.2Cr_0.6(V-Fe)_0.2合金具有优良的综合储氢性能，在室温下储氢容量达到2wt%以上，添加稀土La或Ce改性后，活化性能进一步提高，添加5wt% Ce的合金一次吸放氢即可活化，并且具有良好的吸放氢循环稳定性，经过100次吸放氢循环后，吸氢速度无明显变化，容量保持率为99%。使用该合金为介质设计制造了容量大于180 N·m³的列管式储氢装置，与燃料电池构成的氢-电联用示范系统可进行稳定的发电供能，充满氢气一次可发电200 kW·h以上。

Abstract:

The hydrogen storage properties of Ti_0.8Zr_0.2Mn_1.2Cr_0.6(V-Fe)_0.2 alloy and its rare earth modification effect were studied. The results show that Ti_0.8Zr_0.2Mn_1.2Cr_0.6(V-Fe)_0.2 alloy has excellent comprehensive hydrogen storage performance, with a hydrogen storage capacity more than 2 wt% at room temperature. After adding rare earth La or Ce for modification, the activation performance is further improved. The alloy added with 5wt% Ce can be activated by only one hydrogen absorption and desorption cycle, and has good hydrogen absorption and desorption cycling stability. After 100 hydrogen absorption and desorption cycles, the hydrogen absorption rate does not change significantly, and the capacity retention rate is 99%. A tubular hydrogen storage equipment with capacity greater than 180 N·m³ was designed and manufactured using this alloy as the medium, and it was combined with a fuel cell to form a hydrogen-electric conversion system, which could provide stable power generation and generate power more than 200 kW·h at one time when filled with hydrogen.