Nanowire silicon electrodes have an essential potential application in next-generation lithium-ion battery. It is of significance for the development and application of nanowire silicon electrodes to explore the state of charging (SOC) and evaluate the influencing factors. In recent years, many studies show that the lithiation process in silicon electrodes is a two-phase lithiation process, which depends on the rate of interface reaction. In this paper, the effect of interface reaction rate on SOC is studied based on the buckling analysis of a nanowire silicon electrode using a reaction–diffusion model. Temporal evolution of the resultant axial force and the critical force for the buckling of electrode during lithiation, was illustrated and discussed. The analysis of stress was carried out in terms of the theories of finite deformation as well as small deformation. Results show the interface reaction rate has an obvious influence on SOC. Generally, SOC decreases with the increase of the interface reaction rate, but the SOC obtained by a finite reaction rate is always higher than that obtained by the conventional diffusion model.

纳米线硅电极在下一代锂离子电池中具有重要的潜在应用。探索充电状态（SOC）并评估影响因素对于纳米线硅电极的开发和应用具有重要意义。近年来，许多研究表明，硅电极中的锂化过程是一个两相锂化过程，取决于界面反应的速率。在本文中，基于使用反应扩散模型的纳米线硅电极的屈曲分析，研究了界面反应速率对 SOC 的影响。说明和讨论了合成轴向力的时间演变和锂化过程中电极屈曲的临界力。根据有限变形理论和小变形理论进行应力分析。结果表明界面反应速率对SOC有明显影响。一般情况下，SOC随着界面反应速率的增加而降低，但有限反应速率得到的SOC总是高于常规扩散模型得到的SOC。