کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1558245 | 999270 | 2016 | 8 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
A high energy density asymmetric supercapacitor based on a CoNi-layered double hydroxide and activated carbon
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
شیمی مواد
پیش نمایش صفحه اول مقاله

چکیده انگلیسی
A high performance asymmetric supercapacitor was fabricated using a CoNi-layered double hydroxide (CoNi-LDH) as the positive electrode and activated carbon as the negative electrode in an electrolyte of 6 M aqueous KOH. The supercapacitor can be cycled reversibly in a wide potential window of 0-1.5 V and exhibits a remarkable energy density of 46.3 Wh·kgâ1 at a power density of 102.3 W·kgâ1, a high energy density of 25.6 Wh·kgâ1 even at a high power density of 1704.5 W·kgâ1 These values are much higher than those of a symmetric supercapacitor using only activated carbon (6.9 Wh·kgâ1). The results can be ascribed to the high specific capacitance and rate capability of the CoNi-LDH, and the complementary potential windows of the two electrodes that increase the working voltage of the supercapacitor. The supercapacitor also exhibits stable cycling with a 84.5% capacitance retention after 1000 cycles.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: New Carbon Materials - Volume 31, Issue 1, February 2016, Pages 37-45
Journal: New Carbon Materials - Volume 31, Issue 1, February 2016, Pages 37-45
نویسندگان
Li-jing Xie, Guo-hua Sun, Long-fei Xie, Fang-yuan Su, Xiao-ming Li, Zhuo Liu, Qing-qiang Kong, Chun-xiang Lu, Kai-xi Li, Cheng-meng Chen,