Silicon-based materials are showing appealing potentials for electrical energy storage because of their unparalleled theoretical energy density. In this work, a rapid and efficient surface-polymerization processing has been developed to obtain a sandwich-like silicon-carbon composite structure for fast lithium storage. The anchored silicon particles are connected with a low diffusion tortuosity in the designed structure that facilitates the electron transport throughout the electrode and enhances the response rate under high current density. Electrochemical measurements demonstrate that the silicon-carbon composite electrode exhibits a high capacity for lithium storage. It shows a reversible capacity of 1990 mA h g⁻¹ at 0.5 C after 100 cycles and also has an excellent capacity retention property (only −0.062% capacity reduction per cycle) in long-term cycling at 1 C. Furthermore, it can deliver a high reversible specific capacity of 1170 mA h g⁻¹ even at 4 C.

硅基材料因其无与伦比的理论能量密度而显示出诱人的电能存储潜力。在这项工作中，已经开发了一种快速有效的表面聚合工艺，以获得用于快速锂存储的夹心状硅碳复合结构。锚定的硅颗粒在设计的结构中以低扩散曲折度连接，这有助于电子在整个电极中的传输，并提高了高电流密度下的响应速度。电化学测量表明，硅-碳复合电极表现出高的锂存储容量。它显示出1990 mA hg ^-1的可逆容量 100个循环后在0.5 C的温度下保持稳定，并且在1 C的长期循环下也具有出色的容量保持性能（每个循环仅降低-0.062％容量）。此外，即使在1170 mA hg ^{-1的条件下}，它也可提供高可逆比容量在4C。