High lithium electroactivity of hierarchical porous rutile TiO2 nanorod microspheres

Abstract Here we report on the hierarchical porous rutile TiO 2 nanorod micospheres as an anode material for lithium-ion batteries. The resulting hierarchical porous rutile TiO 2 nanorod microspheres possessed much higher reversible capacity, cycling stability and rate capability than nanosized rutile TiO 2 previously reported in the literatures. These good electrochemical performances may be attributed to the facile diffusion of Li + ions from outside through the porous channels into the TiO 2 nanorods in the microspheres and the high electrode–electrolyte contact area offered by hierarchical porous microspheres with a large specific surface area.

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