Speaker
Ms
sunisa buekeaw
(Materials Science and Nanotechnology Program, Faculty of Science, Khon Kaen University, Khonkaen, THAILAND 40002)
Description
Tin oxide (SnO${}_2$) is one of the promising high capacity anode materials for next generation lithium ion batteries due to its ability to uptake a large amount of Li-ion. SnO${}_2$ can provide twice as high specific capacity as graphite electrode currently used in commercial Li-ion batteries today. Therefore, using SnO${}_2$ will reduce the amount of materials used to make the electrodes and reduces the production cost of the materials. In addition, the batteries made by using SnO${}_2$ as the anode will be lightweight and have small size. In this project, SnO${}_2$ was synthesized into three structures: nanoparticle, nanosphere and hollow nanosphere via hydrothermal method. The electrochemical properties were measurement using a galvanostatic mode. We found that the SnO2 nanoparticles provided the highest storage capacity due to its compacted structure with capsule-like nanostructure. The specific capacity at C/5 of the first cycle was around 2200 mAh/g and the average capacity at 1C over 20 cycles was around 660 mAh/g. These results indicate that SnO${}_2$ nanostructures synthesized in this work have a more superior performance than graphite and can be used to replace graphite electrode in lithium-ion batteries.
Author
Ms
sunisa buekeaw
(Materials Science and Nanotechnology Program, Faculty of Science, Khon Kaen University, Khonkaen, THAILAND 40002)
Co-author
Prof.
Nonglak Meethong
(Materials Science and Nanotechnology Program, Faculty of Science, Khon Kaen University, Khonkaen, THAILAND 40002)
