Effect of Mg Content on the Electrochemical Properties of (MgCoNiZnLi)O Based High Entropy Oxides for Li-Ion Batteries

Authors : Ersu LOKCU, Resat Can OZDEN, Mustafa ANIK

Pages : 53-56

View : 17 | Download : 5

Publication Date : 2020-12-31

Article Type : Research Paper

Abstract :High entropy oxides insert ignore into journalissuearticles values(HEOs); are attractive as a negative electrode material for lithium-ion batteries because of the high specific capacities and cycling stabilities. Moreover, they offer a wide range of compositional variation to reach the desired electrochemical performances. In this study, we synthesized the Mgxinsert ignore into journalissuearticles values(CoNiZnLi);100-xO high entropy oxides using conventional solid state reaction technique and examined their electrochemical properties in lithium-ion cells as anode material. The structural properties of as-synthesized Mg5insert ignore into journalissuearticles values(CoNiZnLi);95O and Mg35insert ignore into journalissuearticles values(CoNiZnLi);65O HEOs were investigated using X-ray diffraction insert ignore into journalissuearticles values(XRD); technique, which showed that all the oxides have single-phase rock-salt structure. When tested as anode material in lithium-ion cell, Mg5insert ignore into journalissuearticles values(CoNiZnLi);95O anode exhibits higher initial discharge capacity than Mg35insert ignore into journalissuearticles values(CoNiZnLi);65O electrode. However, the Mg35insert ignore into journalissuearticles values(CoNiZnLi);65O electrode shows the higher cycling stability than Mg5insert ignore into journalissuearticles values(CoNiZnLi);95O electrode at the further cycle period. This work offers an approach to control the electrochemical properties of HEO based anodes by tuning active and inactive cation contents in the structure.
Keywords : Conversion type anode, Li ion battery, High entropy oxide