Nano/micrometer porous conductive network structure Li 4 Ti 5 O 12 @C/CNT microspheres with enhanced sodium-storage capability as an anode material.

Li 4 Ti 5 O 12 @C/CNT microspheres, wherein CNTs were firmly anchored to Li 4 Ti 5 O 12 @C nanoparticles, were prepared via a facile spray drying method and subsequently annealed in an argon atmosphere, exhibiting long cycling stability (charge/discharge capacities of 85.45/86.18 mA h g -1 after 500 cycles at 500 mA g -1 ) and excellent rate capability (charge capacity of 61.16 mA h g -1 after 10 cycles at 1000 mA g -1 ). The special spherical structure design is not only beneficial to improving the structural stability and reaction kinetics of the electrode materials during the long-term extraction-insertion of sodium ions but also supplies numerous interfacial sites to store more sodium ions.