کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
10269477 | 459861 | 2005 | 9 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
An investigation of intercalation-induced stresses generated during lithium transport through sol-gel derived LixMn2O4 film electrode using a laser beam deflection method
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
مهندسی شیمی (عمومی)
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چکیده انگلیسی
The stress changes ÎÏ generated during lithium transport through the sol-gel derived LixMn2O4 film electrodes annealed at 773 and 873Â K were quantitatively determined as a function of the lithium stoichiometry x using a laser beam deflection method (LBDM). ÎÏ generated during a real potential step between an initial electrode potential and a final applied potential was uniquely specified by the ÎÏ versus x curve. The LixMn2O4 film annealed at 773Â K for 24Â h (low temperature (LT)-LixMn2O4) showed larger capacity than the LixMn2O4 film annealed at 873Â K for 6Â h (high temperature (HT)-LixMn2O4) and this result is ascribed to the fact that the smaller the grain size is, the more increases the electrochemically active area of the film electrode. From the analysis of the normalised ÎÏ transient measured simultaneously along with the cyclic voltammogram in the potential range of 2.5-3.4Â VLi/Li+, it is found that normalised ÎÏ generated in the LT-LixMn2O4 was smaller than that in the HT-LixMn2O4 during the lithium intercalation/de-intercalation around 3.0Â VLi/Li+ region. This result gives an experimental evidence for the fact that the Jahn-Teller distortion is suppressed by the increase in the average oxidation state of manganese with decreasing in annealing temperature.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Electrochimica Acta - Volume 51, Issue 3, 20 October 2005, Pages 441-449
Journal: Electrochimica Acta - Volume 51, Issue 3, 20 October 2005, Pages 441-449
نویسندگان
Young-Hoo Kim, Su-Il Pyun, Joo-Young Go,