超级电容器
材料科学
电容
电化学
电极
化学工程
纳米片
退火(玻璃)
热液循环
纳米技术
复合材料
化学
物理化学
工程类
作者
Bo Xu,Ye Chen,Qiyong Zhu,Shouling Ding,Shiliu Yang
标识
DOI:10.1016/j.jpcs.2023.111744
摘要
The ZnCo2O4@NiCo2O4 hierarchical nanosheets on nickel foam were successfully synthesized via hydrothermal and annealing approaches. The structure, morphology and composition of the prepared ZnCo2O4@NiCo2O4 hierarchical nanosheets were systematically characterized by XRD, SEM, TEM and EDS. Then the electrochemical properties of the ZnCo2O4@NiCo2O4 hierarchical nanosheets were measured in three-electrode system. It is shown that the ZnCo2O4@NiCo2O4 hierarchical nanosheets exhibited higher specific capacitance and better cycling stability as electrode materials than ZnCo2O4 nanosheets. The specific capacitance of the ZnCo2O4@NiCo2O4 hierarchical nanosheets could reach to a high value of 3021 F g−1 (377 mAh g−1) at current density of 1 A g−1. Moreover, the specific capacitance of the ZnCo2O4@NiCo2O4 hierarchical nanosheets could remain 96.4% of the initial value after 5000 cycles. The excellent electrochemical properties show that the prepared ZnCo2O4@NiCo2O4 hierarchical nanosheets can be a promising electrode material for supercapacitor.
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