硅材料由于储量密度高被认为极有可能成为下一代锂离子电池负极材料，但是硅负极材料极差的循环稳定性和低的倍率放电性能一直阻碍着硅材料的商业化进程。世界各国科学家通过十几年来不懈的研究，硅的循环寿命已经基本能满足实用化的要求，但是硅负极材料的倍率性能以及与其紧密相关的电极过程动力学机理至今缺乏系统的研究。. 本项目拟通过对Si材料电极过程动力学机理的研究，确定嵌脱锂过程的速度控制步骤；发现速度控制步骤的关键控制因素；阐明速度控制步骤的关键控制因素与速度控制步骤和倍率性能三者之间的关系；最终找到提高硅基电极材料倍率性能的方法，为硅基材料的实用化提供坚实的理论基础与技术支持。

Silicon has been considered as next generation anode material for lithium ion batteries due to its high theoretical energy storage density, but extreme low cycle stability and poor high rate discharge ability of Si anode hindered its commercialization. With unremitting study in the past ten years, tremendous progress has been made on improving the cycle life of silicon anode, which has been basically met the requirement for commercialization, but the kinetics of electrode process, which closely relates with the high rate discharge performance of silicon anode is still lack of systematic research. This project intends to study the mechanism of the electrode process kinetics, determine the rate controlling step during lithiation/delithiation process, discovery key control factors of rate controlling step, elucidate the relationship between the rate controlling step, the key control factors of the rate controlling step, and the high rate discharge ability performance so that eventually we can find ways to drastically improve the high rate discharge ability of silicon electrode, providing a solid theoretical and technical support for commercialization of the Si anode for lithium-ion batteries.