An rGO/NiCo₂O₄@ZnCo₂O₄ (RNZC) ternary composite material is synthesized using a simple hydrothermal method. In this report, we demonstrate the effect of rGO concentration on the electrochemical behavior of the rGO/NiCo₂O₄@ZnCo₂O₄ composite materials. The specific capacity values of the ternary composite materials increase with rGO concentration up to 50 mg. Furthermore, on increasing the rGO concentration, the capacity value decreases. Among the prepared samples, the composite with 50 mg of rGO (RNZC3) exhibits a maximum specific capacity of 1197 C g^–1 at a current density of 1 A g^–1. We also demonstrate the design of a supercapacitor device with high specific energy density using RNZC3. The RNZC3//RNZC3 symmetric supercapacitor device exhibits a maximum energy density of 62 W h kg^–1. In the case of an asymmetric supercapacitor device, the applied potential range is extended beyond the water decomposition range. Enhancement of the potential window ensures to achieve a high energy density. The RNZC3//rGO asymmetric supercapacitor device reaches the highest energy density of 71 W h kg^–1 and the corresponding power density is 0.98 kW kg^–1.

中文翻译：

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rGO / NiCo ₂ O ₄ @ZnCo ₂ O ₄三元复合材料的电化学性能及全固态超级电容器的制备

采用简单的水热法合成了rGO / NiCo ₂ O ₄ @ZnCo ₂ O ₄（RNZC）三元复合材料。在这份报告中，我们证明在RGO的电化学行为/镍钴RGO浓度的影响₂ ö ₄ @ZnCo ₂ ö ₄复合材料。rGO浓度高达50 mg时，三元复合材料的比容量值会增加。此外，随着rGO浓度的增加，容量值降低。在这些制备的样品，用50毫克RGO（RNZC3）的复合材料表现出的1197 C g还一最大比容量^-1在1A g的电流密度^-1。我们还演示了使用RNZC3具有高比能量密度的超级电容器器件的设计。RNZC3 // RNZC3对称超级电容器器件的最大能量密度为62 W h kg ^–1。在不对称超级电容器装置的情况下，施加的电势范围超出了水分解范围。势能窗的增强确保获得高能量密度。RNZC3 // rGO非对称超级电容器设备达到71 W h kg ^–1的最高能量密度，相应的功率密度为0.98 kW kg ^–1。