期刊
CHEMISTRY-A EUROPEAN JOURNAL
卷 20, 期 35, 页码 11214-11219出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/chem.201403148
关键词
anode materials; core-shell particles; lithium-ion batteries; metal-organic frameworks; nanostructures
资金
- National Nature Science Foundation of China [20111061]
Hierarchical porous core-shell NiFe2O4@TiO2 nanorods have been fabricated with the help of hydrothermal synthesis, chemical bath deposition, and a subsequent calcinating process. The nanorods with an average diameter of 48 nm and length of about 300-600 nm turn out have a highly uniform morphology and are composed of nanosized primary particles. Owing to the synergistic effect of individual constituents as well as the hierarchical porous structure, the novel core-shell NiFe2O4@TiO2 nanorods exhibit superior electrochemical performance when evaluated as anode materials for lithium-ion batteries. At the current density of 100 mA g(-1), the composite exhibits a reversible specific capacity of 1034 mAh g(-1) up to 100 charge-discharge cycles, which is much higher than the uncoated NiFe2O4 nanorods. Even when cycled at 2000 mA g(-1), the discharge capacity could still be maintained at 358 mAh g(-1).
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