Abstract
Li4Ti5O12@C/CNT microspheres, wherein CNTs were firmly anchored to Li4Ti5O12@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.
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