锂(药物)
硅
材料科学
变形(气象学)
电极
扩散
复合材料
断裂(地质)
光电子学
化学
物理
热力学
医学
物理化学
内分泌学
作者
Kejie Zhao,Matt Pharr,Joost J. Vlassak,Zhigang Suo
摘要
Silicon can host a large amount of lithium, making it a promising electrode for high-capacity lithium-ion batteries. Upon absorbing lithium, silicon swells several times its volume; the deformation often induces large stresses and pulverizes silicon. Recent experiments, however, indicate that under certain conditions lithiation causes inelastic deformation. This paper models such an inelastic host of lithium by considering diffusion, elastic-plastic deformation, and fracture. The model shows that fracture is averted for a small and soft host—an inelastic host of a small feature size and low yield strength.
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