TiO 2 is a potential anode material for lithium‐ion batteries due to its high rate capability and high safety. Here, a controllable synthesis for hollow nanostructured TiO 2 , with heterostructured shells of TiO 2 (B) and anatase phases, is presented for the first time, by using a sequential templating approach. The hollow nanostructures can be easily controlled to produce core–shell and double‐shelled materials with different compositional ratios of anatase to TiO 2 (B) by tuning the synthetic conditions. When used as the anode materials for lithium‐ion batteries, a specific discharge capacity of 215.4 mAh g −1 for the double‐shelled anatase/TiO 2 (B) hollow microspheres is achieved at a current rate of 1 C (335 mA g −1 ) for the 100th cycle and shows high specific discharge capacities of 141.6 and 125.7 mAh g −1 at the high rates of 10 and 20 C over 1000 cycles. These results are due to the unique stable hollow multishelled structure, which has a high specific surface area, as well as the interface between the heterostructured anatase/TiO 2 (B) phases contributing a substantial number of lithium‐ion storage sites.
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Ren et al. (2019) studied this question.