Abstract
Lithium-ion batteries (LIBs) with higher specific energy as well as longer cycling performance have been rapidly evolving in recent years. Silicon as a kind of anode material in LIBs is arousing more and more attention owned to its ultrahigh specific energy and abundant supply. However, the pulverization during lithiation and de-lithiation of silicon always causes a considerable reduction in capacity. Several investigations have been carried out to tackle this problem by using silicon composites with nanostructural design. This study focuses on the most recent research on Si-metal alloy and Si-metal oxide composites, which show significant promise for improving the cycle life of LIBs. Their nanostructures will also be examined to propose new research avenues for silicon-based anodes.
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