کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
6610037 | 459548 | 2015 | 36 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Yeast bio-template synthesis of porous anatase TiO2 and potential application as an anode for sodium-ion batteries
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
مهندسی شیمی (عمومی)
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چکیده انگلیسی
Porous anatase TiO2 samples have been prepared by a bio-template route using low-cost yeast cells as templates. The structure, morphology and electrochemical performance of the prepared samples have been characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), energy dispersive X-ray spectroscopy (EDX), transmission electron microscopy (TEM), Brunauer-Emmett-Teller (BET) analysis, galvanostatic charge/discharge tests and cyclic voltammograms (CV). The results showed that the prepared samples have a hierarchical porous structure replicated from the microstructure of yeast template, which combines macropores (1.5-2.5 μm) and thin pore wall (0.2-0.7 μm) composed by mesopore (9.78 nm) and 10-20 nm active material. The prepared porous TiO2 delivered a discharge capacity of about 255.98 mAh gâ1 and its capacity retention was about 80% after 100 cycles at 1/3C. Remarkably, it still showed a high discharge capacity of 112.93 and 84.65 mAh gâ1 even at 5 and 10C, respectively. The good rate performance can be ascribed to the hierarchical porous structure, which provided good access of the electrolyte to the electrode interface, reducing path lengths for ion diffusion and accommodating volume changes during cycling.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Electrochimica Acta - Volume 182, 10 November 2015, Pages 596-603
Journal: Electrochimica Acta - Volume 182, 10 November 2015, Pages 596-603
نویسندگان
Yong-Ni Li, Jing Su, Xiao-Yan Lv, Yun-Fei Long, Yan-Xuan Wen,