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TiO_2 nanofibers(TiO_2/NFs) have been synthesized through an electrospinning method and annealed at 400, 500 and 600 ℃ to optimize their systems. The effects of annealing temperature on the electrochemical properties for lithium ion batteries(LIBs) are assessed. The obtained LIB properties for TiO_2 nanofiber anodes annealed at 400 ℃(denoted as TiO_2/NFs-400) are much better than those of TiO_2/NFs-500 and TiO_2/NFs-600. The TiO_2/NFs-400 anodes show good LIB performance with capacities of 180 and 150 m Ah/g tested at 200 and 600 m A/g after 100 cycles with almost no capacity loss and superb rate performance. The XRD results show that the pure anatase phase TiO_2 can form at 400 ℃ for TiO_2/NFs-400, while mixed phases of anatase and rutile are emerged at TiO_2/NFs-500 and TiO_2/NFs-600. Furthermore, the TiO_2 nanoparticles are combined in nanofibers, and their corresponding crystal particle size for TiO_2/NFs-400 was smaller than that of the other two samples. It is concluded that the superior electrochemical performance of the TiO_2/NFs-400 anodes could be due to their pure crystal of anatase, small nanoparticles and non-ideal crystal lattices.
The effects of annealing temperature on the electrochemical properties for lithium ion batteries (LIBs) are assessed. The resulting LIBs (TiO 2 / NFs) have been synthesized through an electrospinning method and annealed at 400, 500 and 600 ° C to optimize their systems. properties for TiO 2 nanofiber anodes annealed at 400 ° C (denoted as TiO 2 / NFs-400) are much better than those of TiO 2 / NFs-500 and TiO 2 / NFs-600. The TiO 2 / NFs-400 anodes show good LIB performance with capacities of 180 and 150 m Ah / g tested at 200 and 600 m A / g after 100 cycles with almost no capacity loss and superb rate performance. The XRD results show that the pure anatase phase TiO 2 can form at 400 ° C. for TiO 2 / NFs-400 , while mixed phases of anatase and rutile are emergent at TiO 2 / NFs-500 and TiO 2 / NFs-600. Furthermore, the TiO 2 nanoparticles are combined in nanofibers, and their corresponding crystal particle size for TiO 2 / NFs-400 was smaller than that of the other two samples. It is concluded tha t the superior electrochemical performance of the TiO 2 / NFs-400 anodes could be due to their pure crystal of anatase, small nanoparticles and non-ideal crystal lattices.