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为了研究钛对Mg_2Ni贮氢材料性能的影响,在Mg_2Ni合金中添加不同含量的合金元素钛,并进行了显微组织、吸放氢性能和循环稳定性的测试与分析。结果表明:钛的添加有利于细化晶粒,提高材料的吸放氢性能和循环稳定性。与不添加钛(Mg_2Ni)相比,添加8.233%钛时(Mg_2NiTi_(0.2))的平均晶粒尺寸减小55.63%、最大吸氢量增大47.37%、充放电循环20次后放电容量衰减率减小48.80%、吸氢饱和时间和放氢平台压力基本不变。Mg_2Ni贮氢材料中钛的含量优选为8.233%。
In order to study the effect of titanium on the properties of Mg_2Ni hydrogen storage material, different content of alloying element Ti was added into Mg_2Ni alloy, and the microstructure, hydrogen absorption and desorption properties and cycle stability were tested and analyzed. The results show that the addition of titanium is beneficial to the grain refinement and the hydrogen absorption and desorption properties and the cycle stability. The average grain size of Mg_2NiTi_ (0.2) with addition of titanium (Mg_2Ni) is reduced by 55.63% and the maximum hydrogen absorption capacity is increased by 47.37% when the content of titanium is 8.233%. The decay rate of discharge capacity after 20 cycles of charging and discharging A decrease of 48.80%, hydrogen saturation time and pressure on the hydrogen platform basically unchanged. The content of titanium in the Mg_2Ni hydrogen storage material is preferably 8.233%.