کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
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6470978 | 1424110 | 2017 | 10 صفحه PDF | دانلود رایگان |
A one-pot sol-gel autocombustion synthesis for carbon coated antimony microparticles has been developed. The initial capacities of this material were 647 mAhgâ1Sb vs. Li and 527 mAhgâ1Sb vs. Na, with a rate capability (8C: 398 and 356 mAhgâ1Sb vs. Li and Na respectively) and cyclability (cycle 120 capacity retention: 86% vs. Li, 91% vs. Na). The sol-gel synthesised Sb was found to be superior to commercial Sb of similar particle size (ca. 5-50 μm), which is attributed to carbon coating. In situ Raman analysis revealed differences between the sol-gel synthesised and commercial antimony materials, regarding their reversibility, during the 1 st cycle, and additionally demonstrated that upon charge both materials do not return to a crystalline material, but instead to an amorphous phase represented by a broad feature centred at ca. 140 cmâ1.
Journal: Electrochimica Acta - Volume 247, 1 September 2017, Pages 296-305