Synthesis and Characterization of Cobalt Free LiNiO<sub>2</sub> Substituted by Al-Doping from Beverage Cans via Solid-State Method

Abstract

Lithium metal oxide such as NMC and NCA have been widely commercialized as electric vehicles. However, the cobalt content in the material is harmful to the environment, toxic, and expensive. This research aims to create a cathode material with a lower cost, efficient, and eco-friendly by extracting aluminum from the beverage cans waste as a cation-doping on the substitution of nickel material elements to repair material stability and electrochemistry performance. This study synthesized LNO cathode material by a solid-state method because it is low production cost and easy to synthesize. The extraction of beverage can waste successfully synthesized into alumina compounds corresponding to JCPDS card No. 29-0063. LNO cathode materials were prepared with a stoichiometric composition variation of LNO-P, LNO-Al 0.03, LNO-Al 0.07, and LNO-Al 0.1. Materials that have been successfully synthesized will be tested by X-Ray Diffraction to indicate that the material has a layered-hexagonal structure with high degree ordering. Fourier Transformed Infrared Spectroscopy tests to determine the composition of functional groups on LNO materials. The Scanning Electron Microscope analyzes the shape and morphology of surface material particles. Electrochemical testing uses cylinder batteries with a current of 0.1 C (1 C = 200 mA g-1) and a voltage of 2.6-4.3 volts, where obtained batteries LNO-P, LNO-Al 0.03, LNO-Al 0.07, and LNO-Al 0.1 with discharge capacity of 4.22 mAh g-1, 31.82 mAh g-1, 36.67 mAh g-1, and 37.48 mAh g-1