Investigation of enhanced supercapacitive behavior of Ni-Zn-Co-S/3D porous Ni using electrochemical analysis and X-ray spectroscopic technique

Han Wei Chang^1,2*, Fang Yi Chen⁵, Yao Ting Chen⁵, Ying Rui Lu³, Yu Cheng Huang^2,3,4, Jeng Lung Chen³, Chi Liang Chen³, Mau Tsu Tang³, Bi Hsuan Lin³, Yu Chen Tsai⁵, Wu Ching Chou⁶, Chung Li Dong^2,3

¹Department of Chemical Engineering, National United University, Miaoli, Taiwan
²Department of Physics, Tamkang University, Tamsui, Taiwan
³National Synchrotron Radiation Research Center, Hsinchu, Taiwan
⁴Program for Science and Technology of Accelerator Light Source, National Chiao Tung University, Hsinchu, Taiwan
⁵Department of Chemical Engineering, National Chung Hsing University, Taichung, Taiwan
⁶Department of Electrophysics, National Chiao Tung University, Hsinchu, Taiwan

* Presenter:Han Wei Chang, email:hwchang@nuu.edu.tw

The Ni-Zn-Co-S/3D porous Ni based electrode materials were successfully synthesized and used as electrode material in supercapacitors. The morphology, structural characterization and supercapacitive performance of Ni-Zn-Co-S/3D porous Ni can be controlled by adjusting the deposition time of 3D porous Ni and the ratio of precursor concentration. The Ni-Zn-Co-S/3D porous Ni was characterized and investigated by SEM, TEM, XRD, XPS, and electrochemical analysis to utilize their advantages and the mechanism of energy storage/conversion. The results evidence that Ni-Zn-Co-S/3D porous Ni provide an effective strategy to significantly enhance the supercapacitive performance through the synergistic effect of unique special architecture and redox characteristics of binary metal oxide, which could create more electrochemically active sites for the fast redox reaction. These results combined with X-ray spectroscopic technique (hard X-ray nanoprobe) gives us a better understanding to establish the possible energy storage/conversion mechanism. We expect that these results described here could further provides useful insights for the future development and optimization of reliable energy storage systems.

Keywords: Ni-Zn-Co-S, 3D porous Ni, supercapacitive performance, X-ray spectroscopic technique