LAUSR

Despite red phosphorous (P)-based anodes hold great promise for advanced lithium-ion batteries due to their high theoretical capacity, their practical application is hindered by poor electronic conductivity and drastic volume changes during charge-discharge processes. In order to tackle these issues, herein, a facile grinding method was developed to embed sub-micro- and nano-sized red P particles in N,P-co-doped hierarchical porous carbon (NPHPC). Such a unique structure enables P@NPHPC long-cyclic stability (1120 mA h g −1 after 100 cycles at 100 mA g −1 ) and superior rate performance (248 mA h g −1 at 6400 mA g −1 ). It is believed that our method holds great potential in scalable synthesis of P@carbon composites for future practical applications. 红磷因具有高理论储锂容量而成为新一代锂离子电池的重 要候选材料, 然而其实际应用却受到导电性差以及充放电过程中 体积变化大的限制. 针对以上问题, 本文利用一步碾磨法制备了亚 微米/纳米尺度红磷颗粒嵌入的氮、磷原子共掺杂分级多孔碳复合 材料(P@NPHPC). NPHPC三维交联的分级多孔结构为红磷负载提 供了充足的空间, 促进了稳定磷/碳界面的形成, 从而有效解决了红 磷作为电极材料的不足. 基于此, P@NPHPC负极表现出良好的循 环稳定性(100 mA g −1 电流密度下, 100 次循环后比容量为 1120 mA h g −1 )和优越的倍率性能(6400 mA g −1 电流密度下比容量 为248 mA h g −1 ). 本工作对高性能磷/碳复合材料的批量制备及实 际应用具有指导意义.