Electrochemical properties of four novel high-entropy spinel oxides used as lithium-ion battery anodes synthesized by the glycine-nitrate SCS method

The new inorganic material known as high-entropy oxides (HEOs) has a single-phase structure and is made up of several different main metal elements. It has many useful properties, including a high specific capacity, excellent cycling performance, high structural stability, and super-electronic conductivity. For lithium-ion batteries, it is viewed as a promising electrode material (LIBs). It is significant to develop high entropy oxides with different components and study their properties. Herein, Mg, Ni and Li are added to the quaternary medium entropy (CrFeMnCo)(3)O-4. Four new spinel high entropy oxides were synthesized by glycine-nitrate SCS method at 750 degrees C and their material characterization and electrochemical properties were investigated respectively. The experimental results show that the four obtained samples have uniform particle size distribution. As for the electrochemical test, the capacities of the (CrFeMnCoMg)(3)O-4 and (CrFeMnCoNi)(3)O-4 do not decrease significantly after 800 cycles at 2000 mA center dot g(-1). They have better cycle stability than the (CrFeMnCoMgLi)(3)O-4 and (CrFeMnCoNiLi)(3)O-4. As the anode of LIBs, all HEOs show excellent cycle stability and rate capability. This work provides a new strategy for designing high-entropy energy storage materials.

Automated summary

The new inorganic material known as high-entropy oxides (HEOs) is composed of several different main metal elements and has a single-phase structure. It possesses useful properties such as high specific capacity, excellent cycling performance, high structural stability, and super-electronic conductivity. It is considered as a promising electrode material for lithium-ion batteries (LIBs).