镁基储氢材料颗粒尺寸对吸放氢动力学性能的影响

Effects of Grain Sizes of Mg-Based Hydrogen Storage Materials on Hydrogen Absorption and Desorption Kinetics

摘要:

通过吸放氧动力学方程，计算了颗粒大小对镁-镍-氧化物储氢材料吸放氢动力学过程的影响。计算结果表明：不同颗粒直径的镁-镍-氧化物储氢材料的吸放氢反应速度差别较大；颗粒越小，其吸放氢动力学性能越优异。

Abstract:

The absorption and desorption kinetics of the metal hydrogen storage materials are related with the grain sizes to some extent. By means of the absorption and desorption kinetics equations, the effects of the grain sizes of Mg-Ni-MnO2 hydrogen storage materials on their absorption and desorption kinetics are calculated. The results show that the reaction rates of absorption and desorption are greatly different among the Mg-Ni-MnO2 hydrogen storage materials with different particle sizes; the smaller the particle size is, the better the absorption and desorption kinetic. The experimental results of the absorption and desorption kinetics of the Mg-Ni-MnO2 materials prove the kinetic equations to be rational.