Preparation and performance comparison of LiMn2O3.95Br0.05 and LiMn2O3.95Br0.05/SiO2 cathode materials for lithium-ion battery
RIS ID
37534
Abstract
cathode composites for lithium-ion battery are prepared by solid-state reaction methods. The crystalline structures of the as-synthesized samples are investigated by X-ray diffraction and transmission electron microscope; at the same time, the electrochemical performances are tested by cyclic voltammetry and galvanostatic cycling. The results reveal that the sample of LiMn2O3.95Br0.05/SiO2 has more excellent electrochemical performance than the sample of LiMn2O3.95Br0.05. It delivers an initial discharge capacity of 145.3 mA h g−1 at ambient temperature, and 138.9 mA h g−1 at the higher temperature of 55 °C with good capacity retention with the voltage range of 3.0–4.35 V (vs. Li) at a current density of 0.5 C; while the sample of LiMn2O3.95Br0.05 only deliver initial discharge capacity 136.5 mA h g−1 at ambient temperature, and 119.2 mA h g−1 at 55 °C in the same conditions; in addition, the rate performance of LiMn2O3.95Br0.05/SiO2 is excellent too, so the SiO2 layer has improved the electrochemical behaviors of LiMn2O3.95Br0.05 availably.
Publication Details
Dong, Z., Huang, Y., Jia, D. and Guo, Z. (2011). Preparation and performance comparison of LiMn2O3.95Br0.05 and LiMn2O3.95Br0.05/SiO2 cathode materials for lithium-ion battery. Journal of Solid State Electrochemistry, 15 (4), 725-730.