中国有色金属学报(英文版)
Transactions of Nonferrous Metals Society of China
| Vol. 35 No. 3 March 2025 |
（1. School of Metallurgy, Northeastern University, Shenyang 110819, China;
2. State Key Laboratory of Solidification Processing, Northwestern Polytechnical University, Xi’an 710072, China;
3. Key Laboratory of Electromagnetic Processing of Materials (Ministry of Education), Northeastern University, Shenyang 110819, China;
4. Key Laboratory of Ecological Metallurgy of Multimetallic Mineral (Ministry of Education), Northeastern University, Shenyang 110819, China;
5. Engineering Research Center of Frontier Technologies for Low-carbon Steelmaking (Ministry of Education), Shenyang 110819, China）
Abstract:In response to the limitations of conventional chemical synthesis methods for the structural modulation of nanomaterials, an innovative high magnetic field-assisted wet chemical synthesis method was proposed to prepare NiFe2O4/Fe2O3 heterostructures. It is found that the high-energy physical field could induce a more homogeneous morphology of NiFe2O4/Fe2O3, accompanied by phase transformation from Fe2O3 to NiFe2O4. As a result, the optimized structure obtained under the magnetic field endows NiFe2O4/Fe2O3 with enhanced performance for the lithium-ion battery anode, as evidenced by an increase of 16% (1200 mA·h/g) in discharge capacity and 24% in ultra-stable cycling performance (capacity retention of 97.1%). These results highlight the feasibility of high magnetic fields in modulating material structure and enhancing lithium storage performance.
Key words: high magnetic field; NiFe2O4/Fe2O3; heterostructure; structural regulation; lithium-ion battery anode
