期刊
RSC ADVANCES
卷 10, 期 11, 页码 6342-6350出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c9ra10485b
关键词
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资金
- Natural Science Foundation of China [51502063]
- Project for guiding local Science and Technology development by the Central Government of China [ZY18C04]
- Fundamental Research Foundation for the Universities of Heilongjiang Province [LGYC2018JQ006]
- Harbin Funds for Distinguished Young Scientists [2017RAYXJ023]
- Science Funds for Young Innovative Talents of HUST [201505]
The control of structure and morphology in an electrode design for the development of large-power lithium ion batteries is crucial to create efficient transport pathways for ions and electrons. Herein, we report a powerful combinational strategy to build omnibearing conductive networks composed of titanium niobium oxide nanorods and carbon nanofibers (TNO/CNFs) via an electrostatic spinning method and a hydrothermal method into free-standing arrays with a three-dimensional heterostructure core/shell structure. TNO/CNF electrode exhibits significantly superior electrochemical performance and high-rate capability (241 mA h g(-1) at 10C, and 208 mA h g(-1) at 20C). The capacity of the TNO/CNF electrode is 257 mA h g(-1) after 2000 cycles at 20C, which is much higher than that of the TNO electrode. In particular, the TNO/CNF electrode delivers a reversible capacity of 153.6 mA h g(-1) with a capacity retention of 95% after 5000 cycles at ultrahigh current density. Superior electrochemical performances of the TNO/CNF electrode are attributed to the unique composite structure.
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