High-energy batteries for automotive applications require cells to endure well over a decade of constant use, making their long-term stability paramount. This is particularly challenging for emerging cell chemistries containing silicon, for which extended testing information is scarce. While much of the research on silicon anodes has focused on mitigating the consequences of volume changes during cycling, comparatively little is known about the time-dependent degradation of silicon-containing batteries. Here we discuss a series of studies on the reactivity of silicon that, collectively, paint a picture of how the chemistry of silicon exacerbates the calendar aging of lithium-ion cells. Assessing and mitigating this shortcoming should be the focus of future research to fully realize the benefits of this battery technology.
中文翻译：
含硅电池的日历老化
用于汽车应用的高能电池要求电池能够持续使用 10 年以上，因此其长期稳定性至关重要。这对于新兴的含硅电池化学制品来说尤其具有挑战性，因为它们缺乏扩展测试信息。虽然对硅阳极的大部分研究都集中在减轻循环过程中体积变化的后果，但对时间的了解相对较少——含硅电池的依赖性退化。在这里，我们讨论了一系列关于硅反应性的研究，这些研究共同描绘了硅的化学性质如何加剧锂离子电池的日历老化。评估和减轻这一缺点应该是未来研究的重点，以充分实现这种电池技术的好处。