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Lithium iron phosphate/carbon (LiFePO4/C) composites with high energy density were synthesized by wet ball milling, spray drying, and carbothermal reduction method. The effect of spray drying technological conditions on the performance of LiFePO4/C composites was systematically investigated. The samples were characterized by X-ray diffraction (XRD), scanning electron microscope (SEM), electrochemical...
A facile way of synthesizing LiFePO4/C with high tap density was introduced. LiFePO4/C composites were synthesized by a combination of wet ball milling, spray drying, and carbothermal reduction technology using inexpensive FePO4. The effect of sphericity of secondary microsphere on electrochemical properties and tap density of LiFePO4/C composite was systematically investigated. The sphericity of...
Because enlarged exposed active planes facilitate the improvement of the rate capability of layered cathode material by providing more points for Li+ intercalation/de-intercalation, LiNi0.8Co0.15Al0.05O2 layered cathode material with enlarged exposed {010} active planes is desirable. In this article, micro-sized LiNi0.8Co0.15Al0.05O2 particles possessing enlarged exposed {010} active planes have been...
Blended spherical cathodes of lithium iron phosphate with different particle sizes were prepared using a physical mixing method. The processability and electrochemical properties of blended spherical cathodes were systematically investigated. The characterization results suggest that the blended spherical cathodes contain two different-sized particles, and smaller particles can fill in the gaps created...
One-dimensional Co2+-doped Li4Ti5O12 nanofibers with a diameter of approximately 500 nm have been synthesized via a one-step controllable electrospinning method. The Co2+-doped Li4Ti5O12 nanofibers were systematically characterized by XRD, ICP, TEM, SEM, BET, EDS mapping, and XPS. Based on the cubic spinel structure and one-dimensional effect of Li4Ti5O12, Co2+-doped Li4Ti5O12 nanofibers exhibit the...
Although LiFePO4/C has been successfully put into practical use in lithium-ion batteries equipped on new energy vehicles, its unsatisfactory low temperature results in poor low performance of lithium-ion batteries, leading to a much smaller continue voyage course at extreme environments with low temperature for electric vehicles. In this paper, the electrochemical performance of the LiFePO4/C prepared...
Spherical LiNi1/3Co1/3Mn1/3O2 particles were successfully synthesized using Na2CO3 as a precipitant. Electrochemical measurements indicate that the as-synthesized spherical particles deliver a high reversible capacity of above 180 mAh g−1 at 0.1 C in the voltage range of 2.8–4.4 V and display an excellent cyclic performance at 0.5 C. However, unsatisfactory rate capability was detected for the as-prepared...
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