Carbon-coated MnFe2O4 nanoparticle hollow microspheres as high-performance anode for lithium-ion batteries

被引:38
作者
Yan, Yancui [1 ,2 ,3 ]
Guo, Guannan [1 ,2 ,3 ]
Li, Tongtao [3 ]
Han, Dandan [3 ]
Zheng, Jiahui [1 ,2 ,3 ]
Hu, Jianhua [1 ,2 ]
Yang, Dong [1 ,2 ]
Dong, Angang [3 ]
机构
[1] Fudan Univ, State Key Lab Mol Engn Polymers, Shanghai 200433, Peoples R China
[2] Fudan Univ, Dept Macromol Sci, Shanghai 200433, Peoples R China
[3] Fudan Univ, Dept Chem, Shanghai Key Lab Mol Catalysis & Innovat Mat, Collaborat Innovat Ctr Chem Energy Mat, Shanghai 200433, Peoples R China
关键词
MnFe2O4; nanoparticle; Hollow superstructure; Self-assembly; Carbon coating; Lithium-ion batteries; ELECTROCHEMICAL PERFORMANCE; STORAGE; NANOSTRUCTURES; CAPACITY; NANOFIBERS; COMPOSITE; HYBRID; GROWTH; OXIDES; GREEN;
D O I
10.1016/j.electacta.2017.06.020
中图分类号
O646 [电化学、电解、磁化学];
学科分类号
081704 ;
摘要
In this work, carbon-coated MnFe2O4 nanoparticle (NP) hollow microspheres are fabricated by a facile emulsion-based assembly method followed by in situ ligand carbonization. Specifically, MnFe2O4 NPs stabilized by oleic acid (OA) are the primary building blocks to assemble hollow microspheres, while the subsequent carbonization of OA ligands leads to the formation of uniform carbon coatings without degrading the ordering of NPs. As anode materials for lithium-ion batteries, such MnFe2O4 NP hollow composite microspheres exhibit significantly improved electrochemical performance in comparison with their solid counterparts and most MnFe2O4-based anodes reported to date, retaining a high reversible capacity of 730 mAhg(-1) after 300 cycles at a current density of 2 A g(-1). Furthermore, even when tested at an ultrahigh rate of 10 A g(-1), MnFe2O4 NP hollow microspheres can still deliver a high specific capacity of 433 mAh g(-1). The superior performance of MnFe2O4 NP hollow microspheres is attributable to their hollow superstructure, close-packed configuration of the constituent NPs, and uniform carbon coatings, which facilitate lithium-ion and electron transport while simultaneously alleviating the drastic volumetric change during cycling. Our work establishes that the optimized MnFe2O4 anode material offers great promise for high-performance lithium-ion batteries. (C) 2017 Elsevier Ltd. All rights reserved.
引用
收藏
页码:43 / 50
页数:8
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