共 10 条
Effect of temperature on the hybrid supercapacitor based on NiO and activated carbon with alkaline polymer gel electrolyte
被引:138
作者:
Yuan, Changzhou
Zhang, Xiaogang
[1
]
Wu, Quanfu
Gao, Bo
机构:
[1] Xinjiang Univ, Inst Appl Chem, Urumqi 830046, Peoples R China
[2] Nanjing Univ Aeronaut & Astronaut, Col Mat Sci & Engn, Nanjing 210016, Peoples R China
基金:
中国国家自然科学基金;
关键词:
PVA-KOH-H2O;
polymer gel;
hybrid supercapacitor;
temperature;
D O I:
10.1016/j.ssi.2006.04.052
中图分类号:
O64 [物理化学(理论化学)、化学物理学];
学科分类号:
070304 ;
081704 ;
摘要:
A hybrid supercapacitor was fabricated with NiO and activated carbon as positive and negative electrode, PVA-KOH-H2O containing 5 M KOH as alkaline polymer gel electrolyte, respectively Cyclic voltammetry, electrochemical impedance spectroscopy and galvanostatic chargedischarge measurements were applied to investigate the dependence of the hybrid supercapacitor on the temperatures from -20 to 40 degrees C. The results demonstrated that the capacitive performance of the hybrid supercapacitor turned even better with the temperatures rising up from -20 to 40 degrees C. The increase of temperature improved the conductivity of the alkaline polymer gel electrolyte, decreased the charge-transfer resistance and made the better contact at the interface between the electroactive materials and the alkaline gel electrolyte at higher operating temperature. The maximum of the specific capacitance and energy density of the hybrid supercapacitor were 73.4 F/g and 26.1 Wh/kg at the current density of 0.1 A/g and the operating temperature of 40 degrees C, respectively. (c) 2006 Elsevier B.V All rights reserved.
引用
收藏
页码:1237 / 1242
页数:6
相关论文