Manipulating lithium-ion storage behavior of high entropy oxide (FeCoNiCrMn)3O4 by tuning crystallinity

IF 4.5 2区工程技术 Q2 ENGINEERING, CHEMICAL

Powder Technology Pub Date : 2025-03-13 DOI:10.1016/j.powtec.2025.120910

Dan Wang , Xiao Li , Tongde Gu , Yanni Li , Xiaojing Wen , Qing Wang , Yanguo Liu , Xiwei Qi , Zhiyuan Wang

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引用次数: 0

Abstract

Transition-metal-based high entropy oxides (HEOs) are emerging anode materials for lithium-ion batteries with high theoretical capacities as well as the unique entropy stabilization mechanism. Herein, a high-efficiency microwave solvothermal method is adopted to synthesize the multicomponent high entropy oxide anode (FeCoNiCrMn)₃O₄, and the subsequent heat treatment temperature is finely regulated to investigate the effect of crystallization degree on lithium storage mechanism and electrochemical performance of HEOs. With the increase of sintering temperature, the HEOs undergo amorphous, weakly crystallized, and completely crystallized states without any phase separation in any state benefiting from the unique nucleation and growth mechanism under the microwave and solvothermal combined action. Among the as-prepared HEOs, the HEO-300 anode with an amorphous structure shows smaller grain sizes and higher valence states of metal ions, which provide more active sites under the pseudocapacitor-dominated lithium storage mechanism. A high lithium storage capacity of 679.3 mAh g⁻¹ under 500 mA g⁻¹ after 300 cycles is obtained for HEO-300, and it also exhibits an excellent rate performance. This work provides a new strategy for fabricating high-efficiency high entropy oxide electrodes for energy storage devices; and expounds the relationship between the crystalline degree of HEO and energy storage behavior.

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来源期刊

Powder Technology 工程技术-工程：化工

CiteScore

9.90

自引率

15.40%

发文量

1047

审稿时长

46 days

期刊介绍： Powder Technology is an International Journal on the Science and Technology of Wet and Dry Particulate Systems. Powder Technology publishes papers on all aspects of the formation of particles and their characterisation and on the study of systems containing particulate solids. No limitation is imposed on the size of the particles, which may range from nanometre scale, as in pigments or aerosols, to that of mined or quarried materials. The following list of topics is not intended to be comprehensive, but rather to indicate typical subjects which fall within the scope of the journal's interests: Formation and synthesis of particles by precipitation and other methods. Modification of particles by agglomeration, coating, comminution and attrition. Characterisation of the size, shape, surface area, pore structure and strength of particles and agglomerates (including the origins and effects of inter particle forces). Packing, failure, flow and permeability of assemblies of particles. Particle-particle interactions and suspension rheology. Handling and processing operations such as slurry flow, fluidization, pneumatic conveying. Interactions between particles and their environment, including delivery of particulate products to the body. Applications of particle technology in production of pharmaceuticals, chemicals, foods, pigments, structural, and functional materials and in environmental and energy related matters. For materials-oriented contributions we are looking for articles revealing the effect of particle/powder characteristics (size, morphology and composition, in that order) on material performance or functionality and, ideally, comparison to any industrial standard.