期刊
ROYAL SOCIETY OPEN SCIENCE
卷 4, 期 7, 页码 -出版社
ROYAL SOC
DOI: 10.1098/rsos.170323
关键词
fibre membrane; three-dimensional conductive network; oxygen deficiency; electrospinning; hot-press sintering
资金
- National Natural Science Foundation of China [51474113, 51274106, 51504101]
- Natural Science Foundation of Jiangsu Province [BK20150514]
Improving the specific capacity and electronic conductivity of TiO2 can boost its practical application as a promising anode material for lithium ion batteries. In this work, a three-dimensional networking oxygen-deficient nano TiO2-x/carbon fibre membrane was achieved by combining the electrospinning process with a hot-press sintering method and directly used as a self-standing anode. With the synergistic effects of three-dimensional conductive networks, surface oxygen deficiency, high specific surface area and high porosity, binder-free and self-standing structure, etc., the nano TiO2-x/carbon fibre membrane electrode displays a high electrochemical reaction kinetics and a high specific capacity. The reversible capacity could be jointly generated from porous carbon, full-lithiation of TiO2 and interfacial lithium storage. At a current density of 100 mA g(-1), the reversible discharge capacity can reach 464 mAh g(-1). Even at 500 mA g(-1), the discharge capacity still remains at 312 mAh g(-1). Compared with pure carbon fibre and TiO2 powder, the TiO2-x/C fibre membrane electrode also exhibits an excellent cycle performance with a discharge capacity of 209 mAh g(-1) after 700 cycles at the current density of 300 mA g(-1), and the coulombic efficiency always remains at approximately 100%.
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