Transition metal sulfide electrode materials have been widely studied in recent years, among which structural control is a terrific way to boost the electrochemical performance. Consequently, in this work, Mn-Ni-Co sulfide composites with a double-layer hollow cage structure were prepared by facile ion etching and hydrothermal vulcanization, and the inherent application value in the field of supercapacitors was verified. Due to the special double-layer hollow structure and the synergy between various metal elements, the prepared electrode material exhibited superior electrochemical performance: the specific capacity reached 2460 F g^-1 at the current density of 1 A g^-1 and maintained 81.1% even if the current was raised by 20 times. Then, Typha pollen-derived carbon was produced with salt (ZnCl₂/FeCl₃) activation in one-step calcination. With a Mn-Ni-Co sulfide cathode and a Typha pollen-derived carbon anode, a hybrid supercapacitor device was assembled in a solution of 6 M KOH, which exhibited a great energy density of 80.4 Wh kg^-1 at 800 W kg^-1 and retained outstanding long-term cycling capability of 78.5% specific capacity after 10,000 cycles. The experimental results exhibit that the prepared composites have non-negligible application feasibility in supercapacitors. In addition, the simple structure control and tunable components make the method easily extended to the preparation of other materials, which has unique reference value for the preparation of multi-metal composites in other fields such as batteries and catalysis.

过渡金属硫化物电极材料近年来得到了广泛的研究，其中结构控制是提高电化学性能的重要途径。因此，在这项工作中，采用简便的离子刻蚀和水热硫化法制备了具有双层空心笼结构的 Mn-Ni-Co 硫化物复合材料，并验证了其在超级电容器领域的内在应用价值。由于特殊的双层中空结构和多种金属元素之间的协同作用，所制备的电极材料表现出优异的电化学性能：在1 A g -1 的电流密度^下比容量达到2460  F  g ^-1  即使电流提高20倍也能保持81.1%。然后，在一步煅烧中用盐（ZnCl ₂ /FeCl _{3 ）活化生产香蒲花粉衍生的碳。} 使用 Mn-Ni-Co 硫化物阴极和香蒲花粉衍生的碳阳极，在 6 M KOH溶液中组装混合超级电容器装置，在800 W kg ^-1 时表现出 80.4 Wh  kg ^{-1的高能量密度}  并在 10,000 次循环后保持了 78.5% 比容量的出色长期循环能力。实验结果表明，所制备的复合材料在超级电容器中具有不可忽视的应用可行性。此外，简单的结构控制和可调组分使得该方法易于推广到其他材料的制备，对电池、催化等其他领域多金属复合材料的制备具有独特的参考价值。