Effect of synthesis environment on the electrochemical properties of (FeMnCrCoZn)3O4 high‐entropy oxides for Li‐ion batteries. (10th September 2022)

• Record Type: Journal Article
• Authors: Bayraktar, Deniz Okan; Lökçü, Ersu; Ozgur, Cagla; Erdil, Tuncay; Toparli, Cigdem
• Is Part Of: International journal of energy research. Volume 46:Number 15(2022)
• Page Start: 22124
• Page End: 22133
• Publication Date: 2022-09-10
• Subjects: conversion anode -- high entropy oxide -- Li‐ion battery -- oxygen vacancy; Power resources -- Periodicals; Power (Mechanics) -- Periodicals; Power resources -- Research -- Periodicals; 621.042
• DOI: 10.1002/er.8749
• Languages: English
• ISSNs: 0363-907X

Abstract

Summary: High‐entropy oxides (HEOs) have gained significant attention from lithium‐ion batteries since they can present cycling stability and possess a high specific capacity. While many studies have focused on discovering new high entropy oxides by changing their components, the influence of the synthesis environment on the structural properties and thus electrochemical behavior remain unresolved. Herein, we studied the effect of the synthesis environment, which is argon and air on the structural and electrochemical properties of (FeMnCrCoZn)3 O4 powders. We observed that the synthesis atmosphere affects greatly oxygen vacancy formation. The sample synthesized under an argon atmosphere (HESO‐Ar) shows enhanced cycling and rate performances. Our work can open up new opportunities in designing HEO‐based anodes and utilizing other HEO‐based functional materials by altering and controlling the synthesis environment. Abstract : Synthesis of spinel‐structured high entropy oxide in a different atmosphere. Changing the relative oxygen vacancy amount by controlling the synthesis environment. Enhancing the specific capacity and Li + kinetics via oxygen vacancy.