| 초록 |
Using the supercritical methanol is a simple way to reduce graphene oxide and tin acetate by one pot. This method is without using the reducing agent and avoided the SnO2 aggregation and the graphene restacking. The FESEM of SnO2/graphene indicates the SnO2/graphene of SnO2 particles size ranging from 3nm to 16nm. It also can confirm in the XRD analysis. As a result, it showed a good performance through the battery test: the first cycle exhibited the high reversible capacity that was about 955.3 mA/g and delivered a reversible capacity of 776 mA/g after 70 cycles at a specific current density of 100mA/g. Even as a high current density of 1000mA/g, the reversible capacity remains as high as 520.09 mA/g, higher than the theoretical specific capacity graphite (372 mA/g). |
