Abstract
In order to obtain a new type of lithium battery electrode material with high capacity, a porous titania was fabricated from exfoliated nanosheets. Nitrogen adsorption–desorption isotherms showed that the porous titania has a mesoporous structure composed of slit-shaped pores. The porous titania worked as a rechargeable electrode material. An initial capacity of 267 mAh g −1 (cut-off voltage: 1.0 V) could be achieved, which approximately correspond to the composition of Li 0.8TiO 2. A charge–discharge test between 3 V and 1 V gave a good rechargeable capacity of about 200 mAh g −1 over the first 10 cycles. The porous titania had a larger capacity than the parent unexfoliated H 1.08Ti 1.73O 4 specimen. There was no correlation between the mesopore volume and the capacity. The development of smaller fine pores below the mesopores contributed to obtaining the high capacity.
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