Title: Highly efficient microwave assisted synthesize of high-entropy oxide nano powder for anode Lithium battery application

Abstract

The fabrication of the electrodes with high capacity and stability is one of the major challenges in the development of Li-ion batteries. In this research, a novel green low temperature microwave-assisted method was used for the synthesis of high-entropy oxide (HEO) nanoparticles. The XRD, HR-TEM, and EDS‒STEM analyses were used to study the phase, structural and chemical composition investigations of synthesized nano powders. The results indicated that HEO nanoparticles with five metallic cations (Co, Ni, Mg, Cu, Mn) formed dual phases (rock-salt/spinel) structure with average particle size of 105 nm. The proposed HEO as anode materials for Li ion batteries, exhibited good lithium storage properties with the impressive stability as was demonstrated during 1000 cycles at 1 A/g. The method used in this research has several significant advantages, compared to other conventional techniques including very high fabrication speed (few minutes), low synthesis temperature, nanoscale and highly pure products, and low cost. This newly developed method can be used as an excellent synthesis technique in high-entropy ceramics field, particularly for Li-ion batteries.