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

• DOI: 10.1039/c3ce40737c
• Publication Date: 2013-06-12T15:27:37Z
• Authors: Yunfeng Li; Yanjie Hu; Hao Jiang; Xiaoyu Hou; Chunzhong Li
• Keywords: 02 engineering and technology; 0210 nano-technology; 7. Clean energy

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