Hollow Multishelled High Entropy Oxide with Inert Aluminum Stabilizer for Boosted Electrochemical Lithium Storage

Advanced Functional Materials, Journal Year: 2025, Volume and Issue: unknown

Published: March 16, 2025

Abstract High entropy oxides (HEOs) have gained increasing attention as lithium‐ion battery anodes, owing to their multi‐principal synergistic effect and structural stability. However, the conversion type HEOs also suffer from low intrinsic conductivity, volume expansion, slow kinetics traditional metal oxide. Herein, a (FeCoNiCrMn) 2 O 3 HEO with hollow multishelled structure Al‐doping (Al‐HEO‐HoMS) is successfully prepared by thermal diffusion‐assisted template method. The effectively accommodates changes mitigates strains, resulting in excellent electrochemical Most importantly, inserted Al dopant Al‐HEO‐HoMS serves pegging points, securely fastening other metallic elements Al─O bonds maintain stability of anodes during repeated lithiation/delithiation. Additionally, abundant oxygen vacancies optimized electronic brought doping been validated accelerate lithiation kinetics. Consequently, anode exhibits high reversible capacity 1540 mAh g −1 after 500 cycles at 1 A . combination inert regulation expected alleviate expansion problem, offering universal strategy for designing advanced batteries.

Language: Английский

Enhanced Structural Homogeneity and Conductivity in (Nb0.32V0.17Mo0.17W0.17Co0.17)2O4 High-Entropy Oxide Electrodes via Graphene Quantum Dot Integration and Super-Exchange Interaction for High-Performance Supercapacitors

Journal of Alloys and Compounds, Journal Year: 2025, Volume and Issue: unknown, P. 180248 - 180248

Published: April 1, 2025

Language: Английский