کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
6604814 | 1424097 | 2018 | 38 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Temperature dependent supercapacitive performance in La2O3 nano sheet decorated reduce graphene oxide
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
مهندسی شیمی (عمومی)
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چکیده انگلیسی
It is well known that high performance supercapacitor with high energy and power density is usually degrade at high temperatures. Therefore, to explore the thermal stability, temperature dependent study of supercapacitor is very useful. In the present work, La2O3 nanosheet decorated reduce graphene oxide is synthesized to use it as electrode material in high performance supercapacitor. Temperature dependent electrochemical behavior viz. charging discharging and current voltage (I-V) characteristics are studied to explore the thermal stability of the system. In comparison to pristine rGO, the specific capacitance of La2O3 decorated sample is found to increase by 158% at temperatures 30â¯Â°C and 205% at 70â¯Â°C respectively. The highest value obtained is 751â¯F/g at temperature 70â¯Â°C at a current density of 1 A/g. Remarkably the specific capacitance of hybrid electrode retains 78% of its original value at temperature 30â¯Â°C; conversely 67% of its original value even at higher temperature 70â¯Â°C after 2000 cycles. The enhancement of specific capacitance is explained by the charge transfer effect between rGO and La2O3 at the interface.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Electrochimica Acta - Volume 260, 10 January 2018, Pages 449-458
Journal: Electrochimica Acta - Volume 260, 10 January 2018, Pages 449-458
نویسندگان
Milon Miah, Shatabda Bhattacharya, Diptiman Dinda, Shyamal K. Saha,