کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
7745860 1498280 2014 5 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Effect of carbon coating methods on structural characteristics and electrochemical properties of carbon-coated lithium iron phosphate
ترجمه فارسی عنوان
اثر روش های پوشش کربن بر خصوصیات ساختاری و خواص الکتروشیمیایی فسفات آهن لیتیوم پوشش داده شده با کربن
موضوعات مرتبط
مهندسی و علوم پایه شیمی الکتروشیمی
چکیده انگلیسی
The potential of LiFePO4 as cathode material has not been fully exploited due to its intrinsic poor electronic and ionic conductivities. Attempts have been made to improve these properties of which coating of the active carbon on the particle surface is the most viable method so far. Phase-pure LiFePO4 and two LiFePO4/C composites were synthesized by mechanical activation process employing two different methods: (i) direct addition of acetylene black carbon and (ii) addition of sucrose as carbon precursor. The samples were well characterized by various techniques like elemental analysis, Brunauer-Emmett-Teller (BET) method, scanning electron microscopy (SEM), X-ray powder diffraction (XRD), and Raman spectroscopy to establish their composition, morphology, particle size and surface area. The structure of these samples is investigated as olivine structure space group Pnma by X-ray powder diffraction. Transmission electron microscopy (TEM) confirms that the carbon nanocoating on the LiFePO4 particles has no visible dislocations and fractures. The electrochemical performance of LiFePO4/C is significantly affected by the nature of the carbon nanocoating, which in turn is affected by the choice of synthesis method.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Solid State Ionics - Volume 262, 1 September 2014, Pages 25-29
نویسندگان
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