کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
7993425 | 1516152 | 2018 | 10 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Cobalt-doped V2O5 nanowire arrays on Ti foil for enhanced lithium-ion storage
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
فلزات و آلیاژها
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چکیده انگلیسی
Cobalt (Co)-doped V2O5 nanowire arrays are prepared using a simple hydrothermal method by controlling appropriate molar ratios of cobaltous acetate (Co(CH3COO)2·4H2O) and ammonium vanadate (NH4VO3). The products are characterized by scanning electron microscopy, X-ray diffraction, transmission electron microscopy and Fourier-transform infrared spectroscopy. The nanowires are identified as cobalt-doped V2O5 when the molar ratio of cobalt/vanadium precursors is less than 0.064 (calculated from raw materials); while as the molar ratio increases to 0.128, the nanowires are composed of a mixture of V2O5 and Co3O4. The valence states of Co, O and V are tested by X-ray photoelectron spectroscopy, and the distribution of these elements is confirmed by elemental mapping. The prepared samples are studied and compared with their lithium-storage properties using cyclic voltammetry, charge-discharge test and rate performances. The Co-doped V2O5 nanowires have a higher electrochemical lithium-storage capacity than that of the mixed V2O5/Co3O4 nanowires. At a current density of 30â¯mAâ¯gâ1, an initial discharge capacity of 624.64â¯mAhâ¯gâ1 is achieved in a voltage range of 2-4â¯V.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Alloys and Compounds - Volume 742, 25 April 2018, Pages 567-576
Journal: Journal of Alloys and Compounds - Volume 742, 25 April 2018, Pages 567-576
نویسندگان
Yongsheng Ji, Dong Fang, Chang Wang, Zhi Zhou, Zhiping Luo, Jing Huang, Jianhong Yi,