期刊
MATERIALS RESEARCH BULLETIN
卷 106, 期 -, 页码 7-13出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.materresbull.2018.05.014
关键词
Composites; Oxides; Chemical synthesis; Microstructure; Electrochemical properties
资金
- National Natural Science Foundation of China [21701095]
- Natural Science Foundation for Outstanding Young Scientist in Shandong Province [JQ201002]
- High-end Foreign Experts Recruitment Programs [GDW20173500154]
- Top-notch Innovative Talent Program of Qingdao City [13-CX-08]
- Taishan ScholarProgram of Shandong Province
- Qingdao International Center forSemiconductor Photoelectric Nanomaterials
- Shandong Provincial UniversityKey Laboratory of Optoelectrical Material Physics and Devices
alpha-Fe2O3 microoval structure decorated with SnO2 nanocrystals are fabricated by hydro-thermal process. The composite heterostructure has a uniform size of 310 nm in length and 110 nm in width, and SnO2 shell thickness is similar to 10 nm. The SnO2 shell acts as a conductive layer to offer fast pathways for transport of electrons and ions. What is more, the SnO2 layer serves as an inactive matrix for alpha-Fe2O3 particles, avoiding agglomeration and keeping structural integrity. Benefiting from the smart design, the hierarchical alpha-Fe2O3/SnO2 composite as anode exhibits a higher specific capacity and a better rate performance than those of pristine alpha-Fe2O3 structures. The stability electrochemical performance of the hierarchical composite can be put down to the core-shell architecture, which improves the conductivity and stability of the electrodes. The heterostructure design in our work provides a possible approach to synthesis high stability materials for electrochemical energy storage.
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