▎ 摘　　要

One-dimensional (1D) Li+:TiO2 nanowires and Li4Ti5O12 nanotubes and a Li4Ti5O12 nanotube/graphene composite were prepared by using an electrospinning technique. The types and molecular weights of polymer templates and the annealing rate have important effects on the electrospun products. The Li4Ti5O12 nanotubes and the Li4Ti5O12 nanotube/graphene composite were obtained by heating at a rate of about 0.5 degrees C min(-1) from a polyvinylpyrrolidone (PVP) template, while the Li+:TiO2 nanowires were obtained by heating at a rate of about 2 degrees C min(-1) from a polyethylene oxide (PEO) template. The Li4Ti5O12 nanotubes have an outer diameter of approximately 120 to 200 nm and their wall thickness is in the range of 30 to 40 nm. The morphology and size of the Li4Ti5O12 nanotube/graphene composite are similar to those of the Li4Ti5O12 nanotubes. The Li+:TiO2 nanowires have diameters in the range of 600-3000 nm. The crystal structure of the Li+:TiO2 nanowires was changed from anatase TiO2 to spinel Li4Ti5O12 with increasing Li+ dopant concentration. The electrochemical performance of the Li4Ti5O12 nanotubes and the Li4Ti5O12 nanotube/graphene composite for intended use in a lithium-ion battery (LIB) was investigated and compared with that of the TiO2:Li+ nanowires. The Li4Ti5O12 nanotube/graphene composite specimen exhibits the highest discharge specific capacities and cycle stability, which can reach an initial capacity of 186.4 mA h g(-1), and remain at 175.0 mA h g(-1) after 100 cycles under a current density of 100 mA g(-1).