Structural characterisation of Silicon anode swelling during Lithium ion battery cycling

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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.