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Hierarchical porous TiO_2 nanopills were synthesized using a titanium metal-organic framework MIL-125(Ti) as precursor. The as-synthesized TiO_2 nanopills owned a large specific surface area of 102 m~2/g and unique porous structure. Furthermore, the obtained TiO_2 nanopills were applied as anode materials for Na-ion batteries for the first time. The as-synthesized TiO_2 nanopills achieved a high discharge capacity of 196.4 m Ah/g at a current density of 0.1 A/g. A discharge capacity of 115.9 m Ah/g was obtained at a high current density of 0.5 A/g and the capacity retention was remained as high as 90% even after 3000 cycles. The excellent electrochemical performance can be attributed to its unique hierarchical porous feature.
Hierarchical porous TiO 2 nanopills were synthesized using a titanium metal-organic framework MIL-125 (Ti) as precursor. The as-synthesized TiO 2 nanopills owned a large specific surface area of 102 m ~ 2 / g and unique porous structure. TiO 2 nanopills were applied as anode materials for Na-ion batteries for the first time. The as-synthesized TiO 2 nanoplates achieved a high discharge capacity of 196.4 m Ah / g at a current density of 0.1 A / g. A discharge capacity of 115.9 m Ah / g was obtained at a high current density of 0.5 A / g and the capacity retention was as as as 90% even after 3000 cycles. The excellent electrochemical performance can be attributed to its unique hierarchical porous feature.