Si/C composites are currently the most commercially viable next-generation lithium-ion battery anode materials due to their high specific capacity. However, there are still many obstacles need to be overcome such as short cycle life and poor conductivity. In this work, we design and successfully synthesis an excellent durable double-conductive core-shell structure p-Si-Ag/C composites. Interestingly, this well-designed structure offers remarkable conductivity (both internal and external) due to the introduction of silver particles and carbon layer. The carbon layer acts as a protective layer to maintain the integrity of the structure as well as avoids the direct contact of silicon with electrolyte. As a result, the durable double-conductive core-shell structure p-Si-Ag/C composites exhibit outstanding cycling stability of roughly 1000 mAh g⁻¹ after 200 cycles at a current density of 0.2 A g⁻¹ and retain 765 mAh g⁻¹ even at a high current density of 2 A g⁻¹, indicating a great improvement in electrochemical performance compared with traditional silicon electrode. Our research results provide a novel pathway for production of high-performance Si-based anodes to extending the cycle life and specific capacity of commercial lithium ion batteries.

Si / C复合材料由于其高比容量，目前是最商业上可行的下一代锂离子电池负极材料。但是，仍然需要克服许多障碍，例如循环寿命短和导电性差。在这项工作中，我们设计并成功合成了一种出色的耐用双导电核-壳结构p-Si-Ag / C复合材料。有趣的是，由于引入了银颗粒和碳层，这种经过精心设计的结构提供了出色的导电性（内部和外部）。碳层用作保护层，以保持结构的完整性，并避免硅与电解质的直接接触。结果，耐用的双导电核-壳结构p-Si-Ag / C复合材料表现出出色的约1000 mAh g的循环稳定性。^-1在0.2 A g的电流密度200次循环后^-1和保留765毫安克^-1甚至在2A g的高电流密度^-1，表明在电化学性能有很大的改进与传统的硅电极相比。我们的研究结果为生产高性能硅基阳极提供了一条新颖的途径，以延长商用锂离子电池的循环寿命和比容量。