Mesoporous Li4Ti5O12/carbon nanofibers for high-rate lithium-ion batteries
作者： Jie Wang , Laifa Shen , Hongsen Li , Bing Ding , Ping Nie
DOI: 10.1016/J.JALLCOM.2013.10.134
关键词:
摘要: Abstract Mesoporous Li4Ti5O12/carbon nanofibers (LTO/C NFs) are prepared by a facile electrospinning method combined with soft-template self-assembly. The morphology and structure characterized field-emission scanning electron microscopy, transmission microscopy X-ray diffraction. diameter of as-prepared LTO/C NFs is approximately 400 nm highly crystallinity LTO nanoparticle completely embedded in carbon framework. Nitrogen adsorption–desorption isotherms corresponding pore size distribution reveal that the mesoporous exhibite high specific surface area (212.1 m2/g−1) large volume. Compared regular NFs, show much higher rate capability better capacity retention. At current 5 C, reversible electrode up to 127.4 mA h g−1 still remains at 122.7 after 100 cycles. excellent electrochemical performances closedly related well-defined one-dimensional (1D) nanostructure nanoparticles framework, which efficiently shortened path length Li+ diffusion, enhanced electrolyte-active material contact facilitated rapid transfer.
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