Pengaruh Temperatur Anil terhadap Sifat Elektrokimia Lantanum Pentanikel (LaNi5) dengan Penambahan Serium Oksida (CeO2)

Abstract

Annealing is one of the processes to increase capacity, discharge rate, and cycle life for anode AB5 type alloy
material. Increasing the annealing temperature will increase capacity and homogenize material. This makes
the material more corrosion resistant and resistant to degradation during the process of absorption or
desorption of hydrogen atoms in the electrolyte solution. The study was conducted to see the characterization
of powders anode materials LaNi5 after the addition of 1% CeO2 and annealed at 300, 600, and 900°C for 6
hours in an argon gas environment. The powders were characterized using XRD and SEM-EDX.
Electrochemical testing is measured by using Electrochemical Impedance Spectroscopy (EIS) at a frequency
of 5 mHz - 100 kHz. Increasing anneal temperature changes the diffraction phase, decreasing conductivity
and increasing the resistance value. Semicircle pattern of LaNi5 anode material with the addition of 1%
CeO2 conducted annealing process shows the semicircle pattern with a radius of the arc increases. This
indicates the magnitude of the resistance barrier material.