Journal
ELECTROCHIMICA ACTA
Volume 202, Issue -, Pages 203-208Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.electacta.2016.04.017
Keywords
TiO2; mesocrystalline structure; lithium-ion batteries; sodium-ion batteries; anode
Categories
Funding
- National Natural Science Foundation of China [NSFC 51502038, 21173049, U1505241]
- Research Fund for the Doctoral Program of Higher Education of China [RFDP 20133514110002]
- National Science Foundation of Fujian Province [2015J01042]
- Education Department of Fujian Province [JA14081]
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In this paper, we report a one-step and additive-free route for synthesizing hierarchical rutile TiO2 with mesocrystalline structure. The rutile TiO2 architecture constructed by oriented tiny nanorod subunits (around 5 nm in diameter) have nano/submicro hierarchical structures, nanoporous nature, a relatively large surface area and high tapped density. When the hierarchical rutile TiO2 was studied as anode material for Li-ion batteries (LIBs), they exhibited a high reversible capacity of more than 250 mAh g(-1) within a voltage window of 1-3 V, superior rate capability and very good cycling stability with 220 mAh g(-1) after 100 cycles at 0.1 A g(-1). It's notable that the hierarchical rutile TiO2 exhibited superior Li-ion storage properties under deep cycling conditions (0.01-3.0 V), a stable capacity of 346 mAh g(-1) after 100 cycles at 0.1 A g(-1) could be remained. The hierarchical TiO2 also displayed a large reversible capacity of more than 255 mAh g(-1) (average value) at 0.05 A g(-1) and good cycling performance for Na-ion insertion. These results, in combination with high volumetric storage capacity, render hierarchical rutile TiO2 a promising anode material for rechargeable batteries. (C) 2016 Elsevier Ltd. All rights reserved.
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