کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
6604403 | 1424094 | 2018 | 37 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Thermal influence on the electrochemical behavior of a supercapacitor containing an ionic liquid electrolyte
ترجمه فارسی عنوان
نفوذ حرارتی بر رفتار الکتروشیمیایی سوپراسپتور حاوی الکترولیت مایع یونی
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کلمات کلیدی
مخزن سوپر الکترولیت مایع یونی، درجه حرارت بالا، ثبات سیکلی، مدت زمان آرامش ثابت است
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
مهندسی شیمی (عمومی)
چکیده انگلیسی
Emerging demands on heat-durable electronics have accelerated the need for high temperature supercapacitors as well as for understanding the influence of elevated temperatures on the capacitive behavior. In this work, we present a comprehensive study of the thermal influence on a supercapacitor containing 1-ethyl-3-methylimidazolium acetate (EMIM Ac) electrolyte and activated carbon (AC) electrodes. The performance variation as a function of temperature in a range from 21â¯Â°C to 150â¯Â°C reveals that a high specific capacitance of 142â¯Fâ¯gâ1 can be achieved at 150â¯Â°C at a current density of 2â¯Aâ¯gâ1 with a rate capability of 87% at 15â¯Aâ¯gâ1 (relative to 2â¯Aâ¯gâ1). At 150â¯Â°C, equivalent series resistance (ESR) is only 0.37â¯Î©â¯cm2, which is a result of improved ionic conductivity of the electrolyte at elevated temperature. The ESR value of 2.5â¯Î©â¯cm2 at room temperature reflects a good compatibility between EMIM Ac and AC. In addition, a capacitance retention of more than 95% (in the end of 1000 cycles) is maintained up to 120â¯Â°C followed by 85% at 150â¯Â°C. These results confirm EMIM Ac as a suitable candidate for carbon-based high temperature supercapacitors, and the observations regarding the thermal influence on performance metrics e.g. usable operation voltage could be applicable to other energy storage devices.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Electrochimica Acta - Volume 263, 10 February 2018, Pages 249-260
Journal: Electrochimica Acta - Volume 263, 10 February 2018, Pages 249-260
نویسندگان
Mazharul Haque, Qi Li, Anderson D. Smith, Volodymyr Kuzmenko, Elof Köhler, Per Lundgren, Peter Enoksson,