Preparation and electrochemical properties of two novel high entropy spinel oxides (MgTiZnNiFe)3O4 and (CoTiZnNiFe)3O4 by solid state reaction

Abstract

High entropy oxides (HEOs), a novel class of single-phase inorganic materials with high specific capacity, excellent cycling performance, high structural stability, and super-electronic conductivity, exhibit a wide range of useful properties. It is believed that there is one of the most promising anode materials for lithium-ion batteries (LIBs). Being able to create new electrode materials using an infinite number of elemental combinations thanks to the HEO's distinctive adjustable chemical composition characteristics is advantageous. Herein, two varieties of high entropy spinel oxides, (MgTiZnNiFe)3O4 and (CoTiZnNiFe)3O4 by solid state sintering method, and their material characterization and electrochemical properties were investigated respectively. The outcomes of the experiment demonstrate that the particle size distribution of the two samples is uniform. In the electrochemical test, the capacity is unaffected after 800 cycles at the current density of 1000 mA·g−1, and the two powders exhibit excellent cycle stability and magnification performance. Due to the abundant oxygen vacancies, quick three-dimensional Li+ transport path, and entropy stabilization effect of the spinel structure, all HESOs exhibit exceptional cycle stability and rate capability when serving as the anode of LIBs. The next generation of high-performance lithium-ion battery anode materials may gain from the logical design of high-entropy oxides with a variety of electrochemically active elements and novel structures, according to this research, which proposes a novel method for producing high-entropy energy storage materials.