摘要
Li_(2)FeTiO_(4) composites have been produced using commercial LiAC,FeCl_(2) and different titanium sources by hydrothermal synthesis(HS)at 175℃and subsequent annealing at 700℃.Impure phase TiO_(2),Fe_(2)O_(3) and FeTi0_(4) were detected out among the Li_(2)FeTiO_(4) composites with different titanium sources.Micron and nano-sized particles of Li2FeTiO4 were prepared from various titanium raw materials,with nano-sized particles predominating when titanium raw materials were layered hydrogen titanate nanowire(H2Ti3O7 NW,HTO-NW)and titanium oxide nanotubes(TiO_(2) NB).The Li_(2)FeTiO_(4) composites synthesized by HTO-NW shows a primary particle size of 50-200 nm of high crystallinity staggered with undissolved nanowire with a diameter size of about 100 nm.The samples using one-dimensio nal nanometer titanium oxide(TiO2 NB)as the raw material can get a super high initial discharge capacity of 367.8 mAh/g at the rate of C/10 and excellent cycling stability.The selection of raw materials and adopting multi-phase modification can be considered as an effective strategy to improve the electro-chemical properties of Li_(2)FeTiO_(4) composite cathode materials for the lithium secondary battery.
基金
the National Natural Science Foundation of China(Nos.51874079,51674068)
Natural Science Foundation of Hebei Province(No.E2018501091)
The Training Foundation for Scientific Research of Talents Project,Hebei Province(No.A2016005004)
The Fundamental Research Funds for the Central Universities(Nos.N172302001,N182312007,N182306001)
Hebei Province Key Research and Development Plan Project(No.19211302D)
Qinhuangdao City University Student of Science and Technology Innovation and Entrepreneurship Project(Nos.PZB1810008T-46,PZB1810008T-14)。
