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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 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...
Coiled carbon nanotubes with different length were grown on superfine silicon particles via a chemical vapor deposition method. As anode active materials for Li-ion batteries, this CNTs/Si composite shows a reversible specific capacity of 940mAh/g, a coulombic efficiency of 80% for the first-cycle and good cyclic performance. The improvement of the cyclic performance for silicon particles is related...
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