کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
6471402 1424127 2017 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Synthesis of porous magnesia fibers with enhanced performance as a binder for molten electrolyte
ترجمه فارسی عنوان
سنتز فیبرهای منیزیم متخلخل با عملکرد بالا به عنوان یک اتصال دهنده برای الکترولیت مذاب
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی مهندسی شیمی (عمومی)
چکیده انگلیسی
This paper describes the synthesis and properties of the porous MgO fibers used as a binder of the electrolyte for thermal batteries. Porous MgO fibers with controlled pore size were prepared by a facile hydrothermal method in the presence of polyethylene glycol (PEG). The effect of PEG addition on the pore sizes of the porous MgO fibers was systematically investigated. The influence of porous MgO fibers having different pore sizes on the electrolyte (LiCl-KCl) leakage and electrochemical performances of the corresponding model cells were measured. The results show that a large amount of PEG leads to porous MgO fibers having high specific surface area and total pore volume, and reaching the maximum, 13.65 m2 g−1 and 0.097 m3 g−1 respectively, at 1.5 mol% of PEG addition. The model cell fabricated with porous MgO fiber having high surface area and pore volume shows low deformation and electrolyte leakage, as well as high discharge capacity. Electrochemical impedance spectroscopy (EIS) analysis shows that, the ionic conductivity of the cell increases as the porous MgO fiber pore size increasing. These performances are much better than the performances of cell fabricated with traditional MgO powders. The dimensional stability and large surface area contact of porous MgO fibers with molten electrolyte should account for the superior physical and electrochemical performances of model cell fabricated with porous MgO fibers.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Electrochimica Acta - Volume 230, 10 March 2017, Pages 358-364
نویسندگان
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