Study On Metal Oxide As Anode Material For Lithium Ion Batteries

Rechargeable Li-ion batteries are one of the most important energy storage devices for portable electronics due to their high energy density, high energy capacity, long life span, and no memory effect. Present commercial Li-ion batteries use graphite as anode, which has a theoretical lithium storage capacity of 372 mAh g-1,it is difficult to meet the demand for batteries. In recent years, transition metal oxide has recently been investigated as an anode for lithium-ion batteries due to its high theoretical capacity, ease of fabrication, low cost and low toxicity. In this paper, we report a simple route to fabricate metal oxides with different morphologies by a one-step hydrothermal method. When applied as anode materials for lithium-ion batteries, these metal oxides exhibit remarkable rate and excellent cycling stability even at a high charge/discharge current density. The concrete content of this study is presenteded as follows:NiO nanoplatelet-based materials and NiO microspheres were successfully synthesized by a facile hydrothermal route. The lithium storage property investigation revealed that the NiO nanoplatelet electrode exhibited better rate capabilities than the NiO microsphere electrode. The enhanced electrochemical performance for the NiO nanoplatelet electrode can be attributed to the direct formation of an uniform layeredstructure on Ni form, which provides more active sites for electrochemical reactions and facilitates faster ion/electron transfer.NiO and SnO2 hollow microspheres were synthesized using carbon microspheres as sacrificial templates. SEM and TEM images revealed that these hollow spheres were assembled from particles. The as-synthesized hollow microspheres were applied as anode materials in Li-ion batteries, and exhibited high capacity and excellent cycling performance.We successfully synthesized MgCo2O4 nanowires and MgCo2O4 microsphere using a simple hydrothermal and compared their charge/discharge properties. The MgCo2O4 nanowires electrode exhibit exceptional properties in terms of cycling performance and rate capacity.Comprehensive the above research, metal oxides with different morphologies were successfully synthesized by a facile hydrothermal route, which effectively overcome the flaw of graphite as anode materials for Li-ion batteries. The paper that we have been studied can benefit to the further research.