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

Ade Utami Hapsari, Anne Zulfia Syahrial,, Jarot Raharjo, Agustanhakri

Research output: Contribution to journalConference articlepeer-review

Abstract

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 CeO2 on the performance metal hydride electrode were investigated. In order to study the effects of CeO2 on the performance of anode material, 1%, 2%, and 3% of weight ratio CeO2 was mixed to LaNi5 as 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 LaNi5 structures that affect the electrochemical properties of the material. The addition of cerium oxide at LaNi5 increase of the value of impedance. However, the addition of the value of impedance at 1% CeO2 is not significant when compared with the addition of 2% and 3% CeO2 that actually make the electrochemical properties of LaNi5 worst. Although the addition of 1% CeO2 also slightly increases the impedance value of LaNi5, but the addition of 1% CeO2 showed increase the corrosion resistance than without the addition of CeO2 and the addition of 2% and 3% CeO2.

Original languageEnglish
Article number012004
JournalJournal of Physics: Conference Series
Volume877
Issue number1
DOIs
Publication statusPublished - 10 Aug 2017
Event1st International Conference on Energy Sciences, ICES 2016 - Bandung, Indonesia
Duration: 25 Jul 201627 Jul 2016

Fingerprint Dive into the research topics of 'Effect of the Cerium Oxide (CeO<sub>2</sub>) on the Structural and Electrochemical Properties of the LaNi<sub>5</sub>Ce Metal Hydride Anode'. Together they form a unique fingerprint.

Cite this