SnO2 Nanowires on Carbon Nanotube Film as a High Performance Anode Material for Flexible Li-ion Batteries

Today, li-ion batteries (libs) are the most common rechargeable batteries used in electronic devices. sno2 with theoretical specific capacity of 782 mah/g is among the best anode materials for libs. in this report, threedimensional sno2 nanowires (nws) on carbon nanotube (cnt) thin film (sno2 / cnt) is fabricated using a combination of vacuum filtration and thermal evaporation techniques. the resulting 3d heterostructure sno2/cnt was characterized by x-ray diffraction, transmission electron microscopy (tem) and scanning electron microscopy (sem). this fabricated sno2/cnt electrode has been tested as a flexible and binderfree anode for lib, which exhibits high initial discharge/charge capacity of 4.8/2.25 mah/cm² at a current density of 0.25 a/g, much larger than discharge/charge capacity of bare cnt film (2.2/0.3 mah/cm²). relatively high areal capacity of 1.23 mah/cm² has been achieved for the fabricated lib with sno2/cnt electrode after 20 cycles, proposing this material as a high performance flexible lib anode material.