Herein, a solution-free dry strategy for the growth of self-assembled ordered tricopper phosphide (Cu₃P) nanorod arrays is developed and the product is employed as a high-energy, stable positive electrode for a solid-state hybrid supercapacitor (HSC). The ordered Cu₃P nanorod arrays grown on the copper foam deliver an excellent specific capacity of 664 mA h/g with an energy efficiency of 88% at 6 A/g and an ultra-long cycling stability over 15,000 continuous charge–discharge cycles. These electrochemical features are attributed to the ordered growth of the Cu₃P nanorod arrays, which offers a large number of accessible electroactive sites, a reduced number of ion transfer paths, and reversible redox activity. The potential of the Cu₃P nanorod arrays is further explored by engineering solid-state HSCs in which the nanorods are paired with an activated carbon-based negative electrode. The constructed cell is shown to convey a specific energy of 76.85 Wh/kg at a specific power of 1,125 W/kg and an 88% capacitance retention over 15,000 cycles. Moreover, the superior energy storing and delivery capacity of the cell is demonstrated by an energy efficiency of around 65%. The versatile solution-free dry strategies developed here pave the way towards engineering a range of electrode materials for next-generation energy storage systems.

本文中，开发了用于自组装有序磷化铜（Cu ₃ P）纳米棒阵列生长的无溶液干燥策略，并将该产品用作固态混合超级电容器（HSC）的高能量，稳定的正极）。在铜泡沫上生长的有序Cu ₃ P纳米棒阵列具有664 mA h / g的出色比容量，在6 A / g时的能效为88％，在15,000个连续的充放电循环中具有超长的循环稳定性。这些电化学特征归因于Cu ₃ P纳米棒阵列的有序生长，该阵列提供了大量可访问的电活性位，减少的离子转移路径和可逆的氧化还原活性。Cu ₃的潜力P纳米棒阵列是通过工程固态HSC进一步探索的，其中纳米棒与活性炭基负极配对。所构造的电池显示出在1,125 W / kg的比功率下可传递76.85 Wh / kg的比能量，并在15,000个循环中保持88％的电容。此外，电池的卓越的能量存储和传递能力通过约65％的能量效率得到证明。这里开发的通用的无溶液干燥策略为为下一代能量存储系统设计一系列电极材料铺平了道路。