The Sb doped Li4Ti5O12 hollow spheres with an average diameter of around 3.5 μm were synthesized successfully via through a two-step process. Sb5+ doping can improve the capacity and maintain the cycling stability.
Cr-doped TiO 2 core-shell nanospheres have been prepared by a facile one-pot hydrothermal process. The as-prepared Cr-TiO 2 nanospheres exhibit not only a high visible light activity, but also an excellent lithium storage capacity. Various characterization methods indicate that Cr 3þ ions are uniformly distributed into the TiO 2 lattice and a doping level emerges in the bandgap of TiO 2 , which leads to a prominent photocatalytic activity. When the Cr-TiO 2 nanospheres are employed as lithium battery electrodes, the high lithium storage capacity of Cr 2 O 3 and the p-type conductivity of TiO 2 due to doping may be bene¯cial to improve the electrochemical performances of these electrodes.
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