Controllable synthesis of Fe 3 O 4 polyhedron possessing excellent high-rate electrochemical performance for lithium-ion batteries
Autor: | Wenqing Zhong, Xiaohong Huang, Hu Zhang, Chuan Ding, Chongjiang Dai, Xiaoshu Jiang, Yifei Xia |
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Rok vydání: | 2018 |
Předmět: |
Materials science
Annealing (metallurgy) Mechanical Engineering Nanotechnology 02 engineering and technology Decanoic acid 010402 general chemistry 021001 nanoscience & nanotechnology Condensed Matter Physics Electrochemistry 01 natural sciences 0104 chemical sciences Anode Ion Oleic acid chemistry.chemical_compound Pulmonary surfactant chemistry Nanocrystal Chemical engineering Mechanics of Materials General Materials Science 0210 nano-technology |
Zdroj: | Materials Research Bulletin. 97:142-149 |
ISSN: | 0025-5408 |
Popis: | Fe 3 O 4 nanocrystals (NCs) composed of different proportion of {100} and {111} facets were prepared using oleic acid and decanoic acid as surfactant to mediate their growth process. It has been found that the morphology of Fe 3 O 4 NCs can be tuned by changing the ratio of oleic acid and decanoic acid. When tested as the anode materials in LIBs, the Fe 3 O 4 octahedrons obtained after annealing at 450 °C was found to exhibit superior electrochemical performances with a high reversible capacity of 882.6 mAh g −1 at 1 A g −1 over 200 cycles, whereas the Fe 3 O 4 cubooctahedron and cubes bearing poor electrochemical performances. The present results prove that the surface structure of Fe 3 O 4 polyhedrons significantly influence the utilization of Fe 3 O 4 active materials and hence their electrochemical performance although the morphology will be destroyed during cycling. |
Databáze: | OpenAIRE |
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