Preparation of Ni-Zn-Co-S/3D porous Ni composite electrodes for supercapacitor applications

• Main Authors: Fang-Yi Chen, 陳芳儀
• Other Authors: Yu-Chen Tsai
• Format: Others
• Language: zh-TW
• Published: 2019
• Online Access: http://ndltd.ncl.edu.tw/handle/4s5emx

碩士 === 國立中興大學 === 化學工程學系所 === 107 === In this study, a three-dimensional porous nickel (3D Ni) as the substrate was synthesized via cathodic electrodeposition, followed by a facile two-step strategy that involved the hydrothermal growth of ZnCo-precursor on the 3D Ni and subsequent transformation into Ni-Zn-Co-S through the sulfurization process. The study would include two parts. The first part, Ni-Zn-Co-S was grown directly on the 3D Ni with different deposition times as composite electrodes for supercapacitors. The results indicated that the Ni-Zn-Co-S/3D Ni-6 electrode exhibited the high specific capacitance of 1079.93 F g-1 at the current density of 1 A g-1 due to synergistic effect of the multi-metal and the highly porous architecture. The Ni-Zn-Co-S/3D Ni-6 electrode had good electrochemical properties, and the second part of the study was based on this result. The second part, Ni-Zn-Co-S with different concentrations were grown directly on the 3D Ni-6 as composite electrodes for supercapacitors. The results indicated that the Ni-Zn-Co-S-0.5/3D Ni-6 electrode showed an excellent specific capacitance of 1510.81 F g-1 at the current density of 1 A g-1 with a good cycling stability after 1000 cycles. The remarkable electrochemical performance was attributed to the highly porous and uniform sheet-like architecture, which provided abundant electroactive sites and facilitated transportation of ions/electrons. The results of above analysis demonstrated that Ni-Zn-Co-S-0.5/3D Ni-6 was a promising electrode material for supercapacitors.