The effect of addition Ni2+ to Cr2O3 and its potential characterization as anode potassium ion battery

Abstract

Abstract Potassium ion battery (PIB) is an alternative to replace Lithium ion battery (LIB). In this study, amount of Ni2+ is added to substitute of Cr(III) on Cr2O3. The purpose of this study is to determine the effect of adding Ni2+ ions to Cr2O3 and to test its potential as anode of PIB. Synthesis used the coprecipitation method followed by calcination at 700°C for 12 hours. The results showed that the Cr2O3 - NiCr2O4 composites were formed when the addition of Ni2+ was 0.25; 0.50; and 0.75 mole with the most dominant amounts of NiCr2O4 in the addition of 0.50 mole Ni2+. Cyclic voltammetry analysis of addition of 0.50 mole of Ni2+ to the Cr2O3 shows that the material has an a reduction potential of +0.0344 V and an oxidation potential of +0.587 V. NiCr2O4/Cr2O3 material has the potential as anode material for PIB.