High magnetic field-induced structural transformation of NiFe_(2)O_(4)/Fe_(2)O_(3) heterostructures for enhancing lithium storage performance  

强磁场诱导NiFe_(2)O_(4)/Fe_(2)O_(3)异质结构转变增强其储锂性能

作　　者：Jia-qi LIU Rong-yuan ZHANG Xiao-yang WANG Jun WANG Tie LIU Wei-bin CUI Qiang WANG Shuang YUAN 刘家岐;张荣远;王晓阳;王军;刘铁;崔伟斌;王强;袁双(东北大学冶金学院,沈阳110819;西北工业大学凝固技术国家重点实验室,西安710072;东北大学材料电磁过程研究教育部重点实验室,沈阳110819;东北大学多金属共生矿生态化冶金教育部重点实验室,沈阳110819;东北大学低碳钢铁前沿技术教育部工程研究中心,沈阳110819)

机构地区：[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

出　　处：《Transactions of Nonferrous Metals Society of China》2025年第3期932-944,共13页中国有色金属学报(英文版)

基　　金：supported by the National Natural Science Foundation of China(No.52274294);the Fundamental Research Funds for the Central Universities,China(No.N2124007-1);the Fund of the State Key Laboratory of Solidification Processing in Northwestern Polytechnical University,China(No.SKLSP202101)。

摘　　要：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 NiFe_(2)O_(4)/Fe_(2)O_(3) heterostructures.It is found that the high-energy physical field could induce a more homogeneous morphology of NiFe_(2)O_(4)/Fe_(2)O_(3),accompanied by phase transformation from Fe_(2)O_(3) to NiFe_(2)O_(4).As a result,the optimized structure obtained under the magnetic field endows NiFe_(2)O_(4)/Fe_(2)O_(3) 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.针对传统化学合成方法调控纳米材料结构的局限性,提出一种强磁场辅助的湿化学合成法制备NiFe_(2)O_(4)/Fe_(2)O_(3)异质结构。研究发现,这种高能物理场可使NiFe_(2)O_(4)/Fe_(2)O_(3)的形貌更加均匀,并诱导其物相结构由Fe_(2)O_(3)相向NiFe_(2)O_(4)相转变。因此,在这种磁场下获得的优化结构可显著提高NiFe_(2)O_(4)/Fe_(2)O_(3)作为锂离子电池负极的电化学性能,表现出1200 mA·h/g的放电容量(提高了16%)和长期循环稳定性(容量保持率为97.1%,提高了24%)。这些结果证实了强磁场辅助策略在调节材料结构和增强储锂性能的可行性。

关 键 词：high magnetic field NiFe_(2)O_(4)/Fe_(2)O_(3) HETEROSTRUCTURE structural regulation lithium-ion battery anode 

分 类 号：TG1[金属学及工艺—金属学]