Phase-segregation induced growth of core-shell α-Fe2O3/SnO2 heterostructures for lithium-ion battery

被引：26

作者：

Li, Yunfeng ^{[1
]}

Hu, Yanjie ^{[1
]}

Jiang, Hao ^{[1
]}

Hou, Xiaoyu ^{[1
]}

Li, Chunzhong ^{[1
]}

机构：

[1] E China Univ Sci & Technol, Sch Mat Sci & Engn, Minist Educ, Key Lab Ultrafine Mat, Shanghai 200237, Peoples R China

来源：

CRYSTENGCOMM | 2013年 / 15卷 / 34期

基金：

中国国家自然科学基金; 高等学校博士学科点专项科研基金;

关键词：

MAGNETIC-PROPERTIES; FLAME SYNTHESIS; STRUCTURAL CHARACTERISTICS; HOLLOW SPHERES; PARTICLES; NANORODS; NANOPARTICLES; STORAGE;

D O I：

10.1039/c3ce40737c

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

In this paper, novel core-shell alpha-Fe2O3/SnO2 heterostructures (HSs) are successfully prepared by a one-step flame-assisted spray copyrolysis of iron and tin precursor. The effect of SnO2 component is investigated for the evolution of phase composition and morphology in detail. For the first time, it is noted that SnO2 as a dopant can effectively promote the phase transition of gamma-Fe2O3 to alpha-Fe2O3 during flame synthesis. A phase-segregation induced growth mechanism is proposed to explain the formation of a unique core-shell structure. Such core-shell HSs as LIB anode materials exhibit an enhanced lithium storage capacity in comparison to pure Fe2O3 and SnO2. This enhancement could be ascribed to the synergetic effect of both single components as well as the unique core-shell HSs.

引用

页码：6715 / 6721

页数：7

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