The SnO2 nanotube with CNT core structure (SnO2@void@CNT) and graphene composite electrode for Li-ion batteries

Abstract

In this study, the problem of volume expansion and agglomeration of SnO2-based electrode materials has been solved with a unique and multifaced approach. Nanosized SnO2 is coated around CNT with a void and this structure is decorated between graphene sheets. The problem of aggregation and volume expansion has been solved with nanostructure and voided structure. Besides, conductivity and buffering contributions have been provided by the production composite with graphene and CNT. Herein graphene layers were decorated SnO2 nanotube with CNT core structure (SnO2@void@CNT) and used as an anode for Li-ion battery. The electrodes were produced by vacuum filtration technique as flexible and free-standing with no any binder. To compare, pure SnO2 and SnO2 decorated graphene/CNT skeleton anodes were prepared and characterized. The SnO2@void@CNT/graphene anode exhibited excellent cycling performance and rate capability properties.