Invited Presentation: Si-based Anode -- Recent Development Status and Future Direction

Abstract

Due to its high theoretical capacity (ca. 4200 mAh/g), silicon has been regarded as one of the most promising anode materials for the next generation lithium ion batteries. However, silicon undergoes large volume changes (>300%) during lithium alloying and de-alloying processes leading to pulverization of the active material. Such mechanical failure results in loss of electrical contact with the current collector causing rapid decrease in capacity and consequent failure of the battery. Several approaches have been developed to address this problem, which involved use of nano-sized silicon particles [1], active/inactive matrices [2], amorphous silicon composites [3] and 1-dimensional nanostructures [4].As a leading LIB provider, Samsung SDI is also very interested in the Si anode technology. In this presentation, Samsung SDI’s efforts for alleviating Si swelling and enhancing its cycle performance will be introduced.