BiSbSi: A new ternary layered Si-based anode for Li-ion batteries with high performance

Silicon has become the most promising anode material for industrial application to replace the currently utilized graphite because of its large capacity and abundant reserves. However, its poor electronic conductivity and slow Li-ionic diffusion capability along with severe volume expansion impede its high-rate performace. To resolve these issues, we develop a ternary BiSbSi compound with a layered lattice, which presents significantly improved reaction kinetics of 300 mA h g−1 at 20 A g−1 enabled by faster electronic conduction and lithium ion diffusion and simultaneously reduce the volume variation, thus leading to longer cycling stability of remaining 561 mA h g−1 after 1000 cycles at 2 A g−1, compared with Si counterparts. Broadly the ternary layered Si-based anodes hold great promises to be applied in the near future.