X-ray spectroscopic techniques of Ni-Co based materials for supercapacitor

Han-Wei Chang^1*, Tsung-Yuan Hsieh¹, Jia-Hao Tian², Pin-Ju Chen¹, Ying-Rui Lu³, Yu-Cheng Huang^3,4,5, Chi-Liang Chen³, Jeng-Lung Chen³, Jin-Ming Chen³, Jyh-Fu Lee³, Yu-Chen Tsai², Chung-Li Dong⁴

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

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

The Ni-Co based materials were successfully prepared by hydrothermal method for supercapacitor. The physical/chemical properties and electrochemical performance were characterized and investigated by synchrotron X-ray spectroscopy and electrochemical techniques. The results evidenced that Ni-Co based materials could contribute to the optimization of electrochemical performance due to the existence of multiple redox couple species and unique special architectures, thus create more electrochemically active sites. These integrated properties offer a short electric/ionic transfer path for significant enhancement in electrochemical performance. The electrochemical mechanisms of Ni-Co based materials further explained by integrating electrochemical and synchrotron X-ray spectroscopy that give us a better understanding to elucidate the fundamental atomic/electronic structures of selected materials and further establish the possible dynamic mechanisms during electrochemical processes.

Keywords: Ni-Co based materials, supercapacitor, synchrotron X-ray spectroscopy