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Core–Shell NiFe 2 O 4 @TiO 2 Nanorods: An Anode Material with Enhanced Electrochemical Performance for Lithium‐Ion Batteries
Author(s) -
Huang Gang,
Zhang Feifei,
Du Xinchuan,
Wang Jianwei,
Yin Dongming,
Wang Limin
Publication year - 2014
Publication title -
chemistry – a european journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.687
H-Index - 242
eISSN - 1521-3765
pISSN - 0947-6539
DOI - 10.1002/chem.201403148
Subject(s) - nanorod , materials science , anode , electrochemistry , lithium (medication) , chemical engineering , hydrothermal circulation , composite number , porosity , ion , nanotechnology , current density , deposition (geology) , electrode , composite material , chemistry , medicine , physics , organic chemistry , quantum mechanics , endocrinology , paleontology , sediment , biology , engineering
Hierarchical porous core–shell NiFe 2 O 4 @TiO 2 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 NiFe 2 O 4 @TiO 2 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 NiFe 2 O 4 nanorods. Even when cycled at 2000 mA g −1 , the discharge capacity could still be maintained at 358 mAh g −1 .