Synthesis of Fe/Mg-doped NMC6 22 from Spent Nickel Catalyst as Lithium-Ion Battery Cathode

¹ Department of Chemical Engineering, Faculty of Engineering, Universitas Sebelas Maret, Surakarta 57126, Indonesia
² Centre of Excellence for Electrical Energy Storage Technology, Universitas Sebelas Maret, Surakarta 57146, Indonesia

^* Corresponding author: endah_rd@staff.uns.ac.id

Abstract

The co-precipitation approach, along with nickel-rich (NMC622) cathode materials, magnesium, and Fe doping, was used to produce nickel-rich NMC (NMC622) cathode materials from spent nickel catalysts. Both X-ray diffraction (XRD) and Fourier transform infrared spectroscopy (FTIR) were utilized in order to carry out the characterization of the NMC622 materials. The structural study showed that the doped materials had a structure that was equal to that of Li[Ni_0,6Mn_0,2Co_0,2X_y]O₂, which has a layered hexagonal structure similar to that of α-NaFeO₂. The electrochemical test found that Mg 1 mol% had the highest discharge capacity at 99.61 mAh/g. This was determined by the results of the test. The use of magnesium as a dopant in structurally stable, Ni-rich NMC materials led to an increase in the electrochemical capacity of the Mg-doped NMC. Magnesium exhibited a significant amount of potential as a dopant. It is necessary to do additional research into the functional testing of magnesium as a doping material in order to maximize its use for a longer cycle life and improved thermal stability lithium ion batteries.