Rational design of electrical active materials with high performance for energy storage and conversion is of great significance. Herein, Cu(NiCo)2S4/Ni3S4, a three-dimensional (3D) hierarchical hollow heterostructured electrode material, is designed by etching the well-defined bimetal organic framework (MOF) via sequential in-situ ion-exchange processes. This trimetallic sulfides with unique structure provide large surface area, hierarchical pore distribution and enhanced electrical conductivity, can enrich the active sites for redox reactions, facilitate electrolyte penetration and rapid charge transfer kinetics. As a result, the Cu(NiCo)2S4/Ni3S4 electrode exhibits a high specific capacitance of 1320 F/g at 1 A/g and excellent rate performance (only 15% of capacitance is attenuated when the current density is increased by 20 times). Furthermore, a fabricated hybrid supercapacitor of Cu(NiCo)2S4/Ni3S4/AC can deliver a maximum energy density of 40.8 Wh/kg, remarkable power density of 7859.2 W/kg and superior cycling stability (85% retention of capacitance after 5000 cycles), demonstrating great potential for practical applications in energy storage and conversion devices.

中文翻译：

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双金属有机骨架衍生的具有分级空心异质结构的Cu（NiCo）2S4 / Ni3S4电极材料，可实现高性能储能。

合理设计高性能的能量存储和转换用电活性材料具有重要意义。在此，通过依次进行原位离子交换工艺蚀刻定义明确的双金属有机骨架（MOF），设计了三维（3D）分层中空异质结构电极材料Cu（NiCo）2S4 / Ni3S4。这种具有独特结构的三金属硫化物可提供较大的表面积，分层的孔分布和增强的电导率，可丰富氧化还原反应的活性位点，促进电解质的渗透和快速的电荷转移动力学。结果，Cu（NiCo）2S4 / Ni3S4电极在1 A / g时表现出1320 F / g的高比电容，并且具有出色的倍率性能（当电流密度增加20倍时，只有15％的电容衰减）。 。此外，