Heterogeneous Double-Shelled Constructed Fe3O4 Yolk-Shell Magnetite Nanoboxes with Superior Lithium Storage Performances

被引:37
作者
Zhao, Rongfang [1 ]
Shen, Xiao [1 ]
Wu, Qianhui [1 ]
Zhang, Xiue [1 ]
Li, Wenlong [1 ]
Gao, Ge [1 ]
Zhu, Lingyun [1 ]
Ni, Lubin [1 ]
Diao, Guowang [1 ]
Chen, Ming [1 ]
机构
[1] Yangzhou Univ, Sch Chem & Chem Engn, Yangzhou 225002, Jiangsu, Peoples R China
基金
中国国家自然科学基金;
关键词
Fe3O4; double-shelled SnO2@C-N; adjustable void space; yolk-shell structure; lithium ion batteries; METAL-ORGANIC FRAMEWORKS; CAPACITY ANODE MATERIAL; HOLLOW MICROSPHERES; REVERSIBLE CAPACITY; TERNARY HETEROSTRUCTURES; FACILE SYNTHESIS; BATTERY ANODES; ION BATTERIES; BINDER-FREE; NANOPARTICLES;
D O I
10.1021/acsami.7b07443
中图分类号
TB3 [工程材料学];
学科分类号
0805 ; 080502 ;
摘要
Among the numerous candidate materials for lithium ion batteries, ferroferric oxide (Fe3O4) has been extensively concerned as a prospective anode material because of its high theoretical specific capacity, abundant resources, low cost, and nontoxicity. Here, we designed and fabricated a unique yolk-shell construction by generating heterogeneous double-shelled SnO2 and nitrogen-doped carbon on Fe3O4 yolk (denoted asFe(3)O(4)@SnO2@C-N nanoboxes). The yolk-shell structured Fe3O4@SnO2@C-N nanoboxes have the adjustable void space, which permits the free expansion of Fe3O4 yolks without breaking the double shells during the lithiation/delithiation processes, avoiding the structural pulverization. Moreover, the heterogeneous double-shelled SnO2@C-N can meaningfully improve the electronic conductivity and enhance the lithium storage performance. Two metal oxides also show the specific synergistic effect, promoting the electrochemistry reaction. As a result, this yolk-shell structured Fe3O4@SnO2@C-N exhibits high specific capacity (870 mA h g(-1) at 0.5 A g(-1) after 200 cycles), superior rate capability, and long cycle life (670 mA h g(-1) at 3 A g(-1) after 600 cycles). This design and construction method can be extended to synthesize other yolk shell nanostructured anode materials with improved electrochemistry performance.
引用
收藏
页码:24662 / 24670
页数:9
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