کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
4767113 1424123 2017 11 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
In situ Raman spectroscopic studies on concentration change of electrolyte salt in a lithium ion model battery with closely faced graphite composite and LiCoO2 composite electrodes by using an ultrafine microprobe
ترجمه فارسی عنوان
در محل مطالعات اسپکتروسکوپی رامان در مورد تغییر غلظت نمک الکترولیت در یک باتری مدل یون لیتیوم با الکترودهای کامپوزیتی گرافیتی و الکترولیز لیزری با استفاده از یک میکروپروب فوق العاده
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی مهندسی شیمی (عمومی)
چکیده انگلیسی
The concentration of ions in the electrolyte solution in lithium ion batteries changes during operation, reflecting the resistance to ion migration and the positions of diffusion barriers. The change causes various negative effects on the performance of batteries. Thus, it is important to elucidate how the concentration changes during operation. In this work, the concentration change of ions in the electrolyte solution in deep narrow spaces in a realistic battery was studied by in situ ultrafine microprobe Raman spectroscopy. Graphite composite and LiCoO2 composite electrodes, which are the most commonly used electrodes in practical batteries, were placed facing each other and their distance was set to 80 μm, which is close to the distance between electrodes in practical batteries. After repeated charge/discharge cycles, the concentration of ions increased and decreased greatly during charging and discharging, respectively. The maximum concentration was more than three-times higher than the minimum concentration. The rate of changes in concentration increased almost linearly with increase in current density. The results have important implications about concentration changes of ions occurring in practical batteries.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Electrochimica Acta - Volume 234, 20 April 2017, Pages 93-98
نویسندگان
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