Affiliation:
1. Key Laboratory for Liquid‐Solid Structural Evolution and Processing of Materials (Ministry of Education) Shandong University Jinan 250061 China
2. State Key Laboratory of Powder Metallurgy Central South University Changsha Hunan 410083 China
Abstract
AbstractTransition metal oxides, highly motivated anodes for lithium‐ion batteries due to high theoretical capacity, typically afflict by inferior conductivity and significant volume variation. Architecting heterogeneous structures with distinctive interfacial features can effectively regulate the electronic structure to favor electrochemical properties. Herein, an engineered carbon‐coated nanosized Fe3O4/Cr2O3 heterostructure with multiple interfaces is synthesized by a facile sol–gel method and subsequent heat treatment. Such ingenious components and structural design deliver rapid Li+ migration and facilitate charge transfer at the heterogeneous interface. Simultaneously, the strong coupling synergistic interactions between Fe3O4, Cr2O3, and carbon layers establish multiple interface structures and built‐in electric fields, which accelerate ion/electron transport and effectively eliminate volume expansion. As a result, the multi‐interface heterostructure, as a lithium‐ion battery anode, exhibits superior cycling stability maintaining a reversible capacity of 651.2 mAh g−1 for 600 cycles at 2 C. The density functionaltheory calculations not only unravel the electronic structure of the modulation but also illustrate favorable lithium‐ion adsorption kinetics. This multi‐interface heterostructure strategy offers a pathway for the development of advanced alkali metal‐ion batteries.
Funder
National Natural Science Foundation of China
Subject
Biomaterials,Biotechnology,General Materials Science,General Chemistry
Cited by
1 articles.
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