کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
6470367 1424105 2017 9 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Highly Reversible Sodium-ion Storage in NaTi2(PO4)3/C Composite Nanofibers
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی مهندسی شیمی (عمومی)
پیش نمایش صفحه اول مقاله
Highly Reversible Sodium-ion Storage in NaTi2(PO4)3/C Composite Nanofibers
چکیده انگلیسی


- NaTi2(PO4)3/C composite nanofibers have been firstly synthesized by electrospinning.
- NaTi2(PO4)3/C composite nanofibers show outstanding electrochemical performance in sodium ion batteries.
- We have calculated the DNa+ of samples through the EIS.

NaTi2(PO4)3/C composite nanofibers (NTP/C-F)have been prepared with success by electrospinning followed by calcination in Ar. For comparison, NaTi2(PO4)3 nanofibers have also been synthesized by similar method but calcination in air. NaTi2(PO4)3/C composite particles without special morphology also have been prepared by directly calcining the precursor in Ar. The samples have been characterized by scanning electron microscopy (SEM), High-resolution transmission electron microscopy (HRTEM), X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), charge-discharge test, cyclic voltammetry (CV), electrochemical impedance spectroscopy (EIS). NTP/C-F demonstrates excellent sodium ion storage properties including good rate capability and extended cycle life, much better than other two samples. It delivers the highest discharge capacities, which are about 130, 123, 122, 119, 114, 103, 87, and 63 mAh g−1 at 0.1, 0.2, 0.5, 1, 2, 5, 10, and 20 C, respectively. The discharge capacity reserves as high as 97 mAh g−1 after 500 cycles at 5 C, and the corresponding capacity retention is 93%. Such outstanding property is likely due to the special 1D-structure including uniform electrically conductive carbon network, which brings high electronic conductivity and rapid Na+ diffusion. Hence, NTP/C-F will be a potential electrode candidate for sodium ion batteries.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Electrochimica Acta - Volume 252, 20 October 2017, Pages 523-531
نویسندگان
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