论文标题
一种用于工业生产的氢粉的有效激活方法
An Effective Activation Method for Industrially Produced TiFeMn Powder for Hydrogen Storage
论文作者
论文摘要
这项工作提出了一种有效的热激活方法，对于工业生产的钛铁粉粉（Tifemn）进行氢存储的技术努力低下。在这种情况下，系统研究了温度和tifemn对激活过程的影响。从这项研究中获得的结果表明，在低至50°C的温度下，tifemn材料的激活已经是可能的，并且增加到90°C会大大减少激活的孵化时间，即90°C/90°C样品的孵育时间为507 h，而〜277 h则为507 h 〜277 h，〜277 h需要进行50°C的样品。选择较大尺寸的tifemn颗粒也可以显着改善所研究材料的激活性能。提出的激活程序使得可以克服化合物表面上存在的氧化物层，这是氢原子的扩散屏障。这种激活方法诱导粉末颗粒的进一步裂纹和缺陷，从而产生新的表面，以较高的频率吸收氢，从而在随后的吸收解吸周期中导致更快的吸附动力学。
This work proposes an effective thermal activation method with low technical effort for industrially produced titanium-iron-manganese powders (TiFeMn) for hydrogen storage. In this context, the influence of temperature and particle size of TiFeMn on the activation process is systematically studied. The results obtained from this investigation suggest that the activation of the TiFeMn material at temperatures as low as 50 °C is already possible and that an increase to 90 °C strongly reduces the incubation time for activation, i.e. the incubation time of the 90 °C/90 °C sample is about 0.84 h while ~ 277 h is required for the 50 °C/50 °C sample. Selecting TiFeMn particles of larger size also leads to significant improvements in the activation performance of the investigated material. The proposed activation routine makes it possible to overcome the oxide layer existing on the compound surface, which acts as a diffusion barrier for the hydrogen atoms. This activation method induces further cracks and defects in the powder granules, generating new surfaces for hydrogen absorption with greater frequency, and thus leading to faster sorption kinetics in the subsequent absorption-desorption cycles.
