期刊
JOURNAL OF MATERIALS SCIENCE
卷 56, 期 3, 页码 2497-2505出版社
SPRINGER
DOI: 10.1007/s10853-020-05363-2
关键词
-
资金
- Program for Innovation talents (in Science and Technology) in University of Henan Province [16HASTIT044]
- National Natural Science Foundation of China [61404071]
ZnO/TiO2/C nanofibers with a Zn/Ti mole ratio of 1:1 displayed the highest reversible capacity and excellent rate performance, showing unexpected high specific capacity retention as anode materials.
Long cyclic stability and high rate performance have been the major challenges of lithium-ion batteries (LIBs). Composite metal oxides as a promising anode materials for LIBs have been studied extensively due to their high theoretical capacity, abundant reserves and large-scale production. Yet, their practical applications are seriously restricted by the volume change and poor conductivity. Herein, the ZnO/TiO2/C nanofibers with different mole ratios of Ti/Zn were successfully synthesized by electrospinning method. The ZnO/TiO2/C nanofibers with a Zn/Ti mole ratio of 1:1 exhibited the highest reversible capacity of 912 mAh g(-1)after 500 cycles at 100 mA g(-1). Meanwhile, the ZnO/TiO2/C nanofibers also possess an excellent rate capability even at a high current density up to 5 A g(-1). The Coulombic efficiency of ZnO/TiO2/C nanofibers has been steady at around 100% regardless of rate and long cycle. The good electrochemical properties of ZnO/TiO2/C nanofibers with a Zn/Ti mole ratio of 1:1 may be attributed to the synergistic effect of C and the introduction of interface between ZnO and TiO2. Overall, the ZnO/TiO2/C nanofibers were demonstrated unexpectedly high specific capacity retention, high reversibility and excellent rate performance as the anode materials of LIBs.
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