Structural characterisation of Silicon anode swelling during Lithium ion battery cycling

电动汽车的行驶里程最终取决于电池的能量密度。从负极材料发展的角度来看，能量密度是锂存储能力的函数。与传统的石墨（360毫安时/克）相比，硅具有更大的容量（3600毫安时/克），然而，由于锂离子插入和提取过程中严重的体积膨胀（高达300%）导致容量突然下降，硅基阳极目前在工业上的接受度不足。硅阳极结构状态的变化，如硅尺寸的变化，对于理解这些先进阳极材料对电池性能的长期影响非常重要。因此，Talga的目标是利用A4I计划与国家物理实验室（NPL）的科学家及其最先进的设施合作，以更深入地了解硅阳极基电池中发生的结构变化，并利用这些信息获得更广泛的接受和商业化。

The range of an electric vehicle is ultimately determined by the energy density of the battery. From the perspective of anode material development, energy density is a function of the ability to store lithium. Silicon has a much larger capacity (3600 mAh/g) compared to conventional graphite (360 mAh g),however, Si-based anodes currently fall short in industrial acceptance due to severe volume expansion (as high as 300%) during Li-ion insertion and extraction causing sudden capacity drop.Changes in the structural state of Silicon anodes such as changes in silicon size are important in understanding the long-term effects of these advanced anode materials on battery cell performance. Therefore, Talga aims to use the A4I program to work with National Physical Laboratory (NPL) scientists and their state-of-the-art facilities to gain a deeper understanding of the structural changes that occur in silicon anode-based batteries and use the information in gaining wider acceptance and commercialisation of it's product.