Effect of the Cerium Oxide (CeO2) on the Structural and Electrochemical Properties of the LaNi5Ce Metal Hydride Anode

International Conference on Energy Sciences 2016

能源学;物理学

Hapsari, Ade Utami^1 ; Zulfia, Anne^2 ; Raharjo, Jarot^1 ; Agustanhakri^1

Agency for the Assesment and Application of Technology, Center for Materials Technology, PUSPIPTEK, Serpong-South Tangerang

15314, Indonesia^1

Department of Metallurgy and Material Engineering, Faculty of Engineering, University of Indonesia, Kampus UI, Depok

16424, Indonesia^2

关键词: Atom substitution;    Battery performance;    Electrochemical characteristics;    Electrode material;    Light rare earths;    Metal hydride electrodes;    Negative electrode;    Research applications;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/877/1/012004/pdf
DOI  :  10.1088/1742-6596/877/1/012004

来源: IOP

【 摘 要 】

One of negative electrode, AB5-type alloy electrodes, have been extensively studied and applied in rechargeable Ni-MH batteries due to their excellent electrochemical characteristics. Some researchers have found that addition of rare earth oxides (La, Ce, Pr, Er, Tm, Yb) to AB5-type alloy (MH) electrode improves battery performance significantly. Cerium Oxide (CeO2) is a light rare earth oxide is widely obtained from the processing of tailings in mining activities. During this time, there is still little data for research applications of cerium oxide for electrode materials. In this paper, the effects of adding CeO2on the performance metal hydride electrode were investigated. In order to study the effects of CeO2on the performance of anode material, 1%, 2%, and 3% of weight ratio CeO2was mixed to LaNi5as an negative electrode. The powder mixtures were mechanically milled at a speed of rpm 240 for 2 hours using ball mill. The powder mixtures were characterized by X-Ray Diffraction (XRD) and Scanning Electron Microscope (SEM). Electrochemical characteristics were measured using electrochemical impedance spectroscopy (EIS). The powder mixing showed the presence of Ce atom substitution into LaNi5structures that affect the electrochemical properties of the material. The addition of cerium oxide at LaNi5increase of the value of impedance. However, the addition of the value of impedance at 1% CeO2is not significant when compared with the addition of 2% and 3% CeO2that actually make the electrochemical properties of LaNi5worst. Although the addition of 1% CeO2also slightly increases the impedance value of LaNi5, but the addition of 1% CeO2showed increase the corrosion resistance than without the addition of CeO2and the addition of 2% and 3% CeO2.