A supercapacitor would be one of the most reliable energy storage device, but due to inadequate energy density, it is restricted to commercialization. The bimetallic core nanoparticles possess multiple oxidation states in their core@shell design, and understanding the effect of tuning of core cations are noble artifacts for effective research. Here, an effective strategy of varying the cations (M = Ni, Zn and Mn) in the M_xCo_3-xS₄@NiMoS₄ core@shell is demonstrated. Among the M_xCo_3-xS₄@NiMoS₄ electrodes, the NiCo₂S₄@NiMoS₄ core@shell showed better electrochemical storage properties with areal capacity/gravimetric capacity of 0.92 mAh cm⁻²/287.5 mAh g⁻¹ at 3 mA cm⁻² (3410.0 F g⁻¹ capacitance), and superior cycle life with ca. 92.3% capacity retention at high current density of 50.0 mA cm⁻² after 10,000 cycles. Moreover, real–time application was monitored by assembling an asymmetric solid–state device, taking NiCo₂S₄@NiMoS₄ as the cathode and Fe₂O₃/NG hydrogel as the anode. The device delivers an excellent cell capacity of 90.4 mA hg⁻¹ with a remarkable cycle life of 90.5% after 10,000 cycles. The device stored a very high energy density of 72.3 Wh kg^–1at 460.0 W kg⁻¹ and retained an energy density of 32.6 Wh kg⁻¹ at a high power density of 11,844.0 W kg⁻¹, demonstrating high applicability towards practical energy storage devices.

超级电容器将是最可靠的能量存储设备之一，但由于能量密度不足，因此仅限于商业化。双金属核纳米粒子在其核壳设计中具有多种氧化态，并且了解调节核心阳离子的效果是进行有效研究的崇高产物。在此，说明了改变M _x Co _3-x S ₄ @NiMoS ₄核壳中的阳离子（M = Ni，Zn和Mn）的有效策略。在M _x Co _3-x S ₄ @NiMoS ₄电极中，NiCo ₂ S ₄ @NiMoS ₄core @ shell表现出更好的电化学存储性能，在3 mA cm ^-2（3410.0 F g ^-1电容）下的单位面积容量/重量比为0.92 mAh cm ^-2 /287.5 mAh g ^-1，循环寿命约为。10,000次循环后，在50.0 mA cm ^-2的高电流密度下，容量保持率为92.3％。此外，通过组装一个不对称的固态设备来监测实时应用，以NiCo ₂ S ₄ @NiMoS ₄为阴极，Fe ₂ O ₃ / NG水凝胶为阳极。该器件可提供90.4 mA hg ^-1的出色电池容量10,000次循环后具有90.5％的显着循环寿命。该设备在460.0 W kg ^-1时存储了72.3 Wh kg ^-1的非常高的能量密度，在11,844.0 W kg ^-1的高功率密度下保持了32.6 Wh kg ^-1的能量密度，证明了其在实际能量存储中的高度适用性设备。