期刊
JOURNAL OF SOL-GEL SCIENCE AND TECHNOLOGY
卷 61, 期 1, 页码 49-55出版社
SPRINGER
DOI: 10.1007/s10971-011-2589-2
关键词
Fibres; Sol-gel processes; Electrospinning; ZnTiO3
资金
- Hebei Natural Science Foundation of China [E2011506001]
Layered LiNi1/3Co1/3Mn1/3O2 nanoparticles were prepared by modified Pechini method and used as cathode materials for Li-ion batteries. The pyrolytic behaviors of the foamed precursors were analyzed by use of simultaneous thermogravimetric and differential thermal analysis (TG-DTA). Structure, morphology and electrochemical performance characterization of the samples were investigated by X-ray diffraction (XRD), field emission scanning electron macroscopy(SEM), Brunauer-Emmett-Teller (BET) specific surface area and charge-discharge tests. The results showed that the samples prepared by modified Pechini method caclined at 900 A degrees C for 10 h were indexed to pure LiNi1/3Co1/3Mn1/3O2 with well hexagonal structure. The particle size was in a range of 100-300 nm. The specific surface area was larger than that of the as-obtained sample by Pechini method. Initial discharge capacity of 163.8 mAh/g in the range 2.8-4.4 V (vs. Li/Li+) and at 0.1C for LiNi1/3Co1/3Mn1/3O2 prepared by modified Pechini method was obtained, higher than that of the sample prepared by Pechini method (143.5 mAh/g). Moreover, the comparison of electrochemical results at different current rates indicated that the sample prepared by modified Pechini method exhibited improved rate capability.
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