Red phosphorus (P) anodes possesses the highest theoretical capacities for both potassium-ion and sodium-ion batteries (PIBs/SIBs). An optimal strategy to play out its electrochemical performance is to confine nanoscale red P within a porous carbon structure. Nevertheless, the practical application of these P/carbon nanocomposites is challenged by their high air-sensitivity and poor cyclability associated with inevitable P deposition onto the external surface of carbon matrices, especially with high P content in the P/carbon composite. Herein, a dual-protection red P material was designed and fabricated by simple surface coating of a polypyrrole (PPy) layer onto a red P-activated carbon ([email protected]) composite. The conducting PPy coating plays a multifunctional role including, promoting the structural stability by isolating the direct contact of active material from the electrolyte, improving electrical conductivity, and enhancing the air oxidation resistance by the PPy barrier layer. The PPy-coated [email protected] with a relatively high P content of ∼52 wt% demonstrates excellent air stability while exhibiting high reversible capacities (∼800 mAh g⁻¹ at 0.05 A g⁻¹ for SIBs; ∼400 mAh g⁻¹ at 0.02 A g⁻¹ for PIBs) and long cycle life. This study sheds light on the rational design of advanced P-based anodes for alkali metal-ion batteries.

对于钾离子和钠离子电池（PIB / SIB），红磷（P）阳极具有最高的理论容量。发挥其电化学性能的最佳策略是将纳米级红色P限制在多孔碳结构内。然而，这些P /碳纳米复合材料的实际应用受到其高的空气敏感性和与不可避免的P沉积到碳基质的外表面上相关的差的可循环性的挑战，特别是在P /碳复合物中的高P含量。在此，通过在红色P活化的碳（[受电子邮件保护]）复合材料上简单地将聚吡咯（PPy）层表面涂覆，设计并制造了双重保护的红色P材料。PPy导电涂层起着多功能的作用，包括：通过隔离活性物质与电解质的直接接触来提高结构稳定性，改善电导率，并通过PPy阻隔层增强耐空气氧化性。P含量约为52 wt％的较高Py涂层（受电子邮件保护）具有出色的空气稳定性，同时具有高可逆容量（约800 mAh g）^-1 0.05 A G ^-1为的SIB; PIB在0.02 A g ^-1时约为400 mAh g ^-1），循环寿命长。这项研究为碱金属离子电池高级P基阳极的合理设计提供了启示。