Fe 2 O 3 –SnO 2 –graphene films as flexible and binder-free anode materials for lithium-ion batteries

A flexible Fe 2 O 3 –SnO 2 –graphene (GNs) film material was synthesized based on a method of physical blending. The product is characterized by x-ray powder diffraction, scanning electron microscopy, transmission electron microscopy, and x-ray photoelectron spectroscopy. The results show that the Fe 2 O 3 –SnO 2 particles are uniformly distributed among GN layers, and the film can be used as working electrode directly without any binder or conductor. The binder-free Fe 2 O 3 –SnO 2 –GNs film shows high charge capacity and good cycling life both in half and full cells. The Fe 2 O 3 –SnO 2 –GNs film delivers an initial discharge capacity of 946 mA h g −1 at 100 mA g −1 and maintains a capacity of 538 mA h g −1 after 90 cycles in half cell. For full cell, the film also exhibits a high capacity of 334 mA h g −1 at 100 mA g −1 after 30 cycles.