期刊
INTERNATIONAL JOURNAL OF ENERGY RESEARCH
卷 40, 期 6, 页码 763-769出版社
WILEY
DOI: 10.1002/er.3480
关键词
asymmetric supercapacitor; nickel oxide; activated carbon; composite electrode
资金
- Shandong Provincial Natural Science Foundation [ZR2015BL017]
- Scientific Research Foundation for Advanced Scholars of Qingdao Agricultural University [631015]
A concept for designing capacitor/battery-capacitor asymmetric supercapacitor is proposed to improve low-temperature capacitance, which consists of a capacitor-type electrode (C) and a capacitor/battery-type composite electrode (NiO/C). This construction overcomes the capacitor-battery asymmetric supercapacitor's shortcoming of losing capacitance characteristics. By adjusting the NiO/C mass ratio to 1/2, the new NiO/C-C asymmetric supercapacitor maintains excellent capacitance feature (rectangular CV curves and symmetrical charge/discharge profiles) as well as enlarging the work potential to 1.5V, showing improved low-temperature capacitance in comparison with C-C and NiO-C constructions. It is believed to come from the decreased total inner resistance and charge-transfer resistance due to the substitution of NiO electrode with NiO/C composite electrode in the asymmetric supercapacitor. Copyright (c) 2016 John Wiley & Sons, Ltd.
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