Résumé
Niobium doped nanofibers elaborated by facile, single-step electrospinning present higher rate capability in electrochemical cycling experiments than non-doped materials. This is attributed to the reduction of Li+ diffusion path lengths and enhanced intimate inter-particle contact, in combination with improved intra-particle conductivity. Niobium doping has a significant effect on the electronic structure and provokes a substantial decrease in particle size.