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Time-dependent elementary polarizations of FeF 3 ·3H 2 O/C cathode material were quantitatively investigated in dc polarization in order to determine the key factors that comprise the total polarization. The measurement of electrochemical impedance spectrum at a given state of charge and the subsequent least square fitting of its equivalent circuit allow the calculation...
A new cathode material for lithium ion battery FeF3 · 0.33H2O/C was synthesized successfully by a simple one-step chemico-mechanical method. It showed a noticeable initial discharge capacity of 233.9 mAh g−1 and corresponding charge capacity of 186.4 mAh g−1. A reversible capacity of ca.157.4 mAh g−1 at 20 mA g−1 can be obtained after 50 charge/discharge cycles. To elucidate the lithium ion transportation...
A cathode material, 0.5Li2MnO3 0.5LiNi0.5Mn0.5O2, was prepared by citric acid-assisted sol–gel method and its electrochemical performance was investigated. It delivered a charge capacity of 270 mAh g−1 and a discharge capacity of 189 mAh g−1 in the first cycle. With the increase of current density from 14 to 28 mA g−1, the discharge capacity dropped severely to 130 mA g−1. Obviously, the rate capability...
Layered lithium ion battery cathode material LiNi1/3Co1/3Mn1/3O2 with uniform particle size of about 6 μm was synthesized by a spray pyrolysis method. Infrared and X-ray diffraction analyses show that the pyrolysis at 1,000 °C for 2 s in the tube furnace eliminates nearly all the organic components but is still not enough for the complete crystallization of LiNi1/3Co1/3Mn1/3O2 materials. Therefore,...
Layered lithium ion battery cathode material LiNi1/3Co1/3Mn1/3O2 with a uniform particle size of about 6 μm was synthesized by a spray pyrolysis method. The lithium ion diffusion kinetics in LiNi1/3Co1/3Mn1/3O2 composite cathode were systematically studied by the ratio of potentio-charge capacity to galvano-charge capacity method, galvanostatic intermittent titration technique, electrochemical impedance...
Nasicon-type solid electrolyte Li1.3Al0.1Zn0.1Ti1.8P3O12 was prepared by citric acid-assisted acrylamide polymerisation gel method. X-ray diffraction pattern showed that the introduction of Zn2+ in the parent matrix Li1+xAlxTi2−xP3O12 made it easier to get high-purity rhombohedral structure (space group $$ R\overline 3 C $$ ) Li1.3Al0.1Zn0.1Ti1.8P3O12 without the evidence of impurity secondary...
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