储氢合金的动力学性能是限制镍氢动力电池发展的瓶颈。本项目针对储氢合金电极表面吸附过程的反应机理和影响因素认识不清问题，采用控制电流阶跃法和交流阻抗法研究吸附过程的反应机理，并系统研究储氢合金制备方法对吸附电阻的影响，采用TEM、SEM、AFM、XRD、ICP等手段研究合金晶体结构、微观组织、粒度分布与吸附过程的关系；同时针对吸放氢反应速率难以准确测定的问题，基于能垒理论，建立吸放氢反应的标准活化自由能在极化电势下的模型，并利用传递系数计算不同极化电势和不同放电深度下的吸放氢反应速率常数。本项目的创新点在于系统研究储氢合金电极表面吸附过程的反应机理及其影响因素，并提供一种能够快捷、准确计算吸放氢反应速率常数的方法。通过本项目研究，解决长期以来对吸附过程认识不清问题，同时，找出一条全新的途径研究吸放氢反应速率，为储氢合金动力学性能的进一步研究提供理论依据，推动镍氢动力电池和电动汽车的发展。

The kinetics properties of the hydrogen storage alloys limit the development of the nickel-metal hydride power batteries. The reaction mechanism and the influencing factor of the adsorption process on the surface of the hydrogen storage alloy electrodes are still unclear. This project adopts control current step method and electrochemical impedance spectroscopy to investigate the reaction mechanism of the adsorption process, and systematically investigate the influence of the preparation method for the hydrogen storage alloys on the adsorption resistance. TEM, SEM, AFM, XRD, ICP are employed to study the relationship between the adsorption process and the crystal structure, microstructure and particle size distribution of the alloys. Meanwhile, it is difficult to measure the reaction rates of the charging/discharging reactions. For this problem, the kinetics model of the standard Gibbs free energy for the charging/discharging reactions in the polarization potential is established based on the energy barrier theory. The transfer coefficients obtained from the slope of the Tafel polarization branch can be used to calculate the rate constants of the charging/discharging reactions in different polarization potentials and various depth of discharge. The innovation point of this project is to systematically investigate the reaction mechanism and the influencing factor of the adsorption reaction, and a convenient method is proposed to investigate the rate constants of the charging/discharging reactions. The long-standing issue of the unclear understanding for the adsorption process will be solved via implementing this project, and a new way to study the rate constants of the charging/discharging reactions is proposed. Hence, the theoretical basis for the further study of the kinetics properties of the hydrogen storage alloys is provided, promoting the development of the nickel-metal hydride power batteries and electric vehicles.