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学科主题: 物理化学
题名: Influence of Electrolyte Concentration and Temperature on the Capacitance of Activated Carbon
作者: Tian Ying1, 2;  Yan Jing-Wang1;  Xue Rong1;  Yi Bao-Lian1
通讯作者: 阎景旺
关键词: Supercapacitor ;  Activated carbon ;  Electrolyte concentration ;  Temperature
刊名: ACTA PHYSICO-CHIMICA SINICA
发表日期: 2011-02-01
DOI: 10.3866/PKU.WHXB20110221
卷: 27, 期:2, 页:479-485
收录类别: SCI
文章类型: Article
部门归属: 3
项目归属: 3T1
产权排名: 1,1
WOS标题词: Science & Technology ;  Physical Sciences
类目[WOS]: Chemistry, Physical
摘要: Influence of Electrolyte Concentration and Temperature on the Capacitance of Activated Carbon
研究领域[WOS]: Chemistry
英文摘要: The influences of electrolyte concentration and temperature on the capacitive behavior of activated carbon (AC) were investigated by cyclic voltammetry, electrochemical impedance spectroscopy, and galvanostatic charge/discharge measurements. The performance of a symmetric capacitor was characterized in 0.1, 0.5, 1.0, and 6.0 mol . L-1 KOH solution. We found that the high electrolyte concentration led to high capacitance, low internal resistance, and a narrow voltage window. The capacitance and internal resistance were found to be linearly dependent on the logarithm of KOH concentration. AC supercapacitor performance was investigated at 20, 40 and 80 degrees C, respectively. We found that elevated temperatures are favorable for an increase in capacitance and for a decrease in internal resistance. However, elevated temperatures increase the capacitance fading rate during long charge/discharge cycling tests.
关键词[WOS]: TEMPLATED MESOPOROUS CARBONS ;  SUPERCAPACITORS ;  PERFORMANCE ;  BEHAVIOR
语种: 英语
WOS记录号: WOS:000286597200033
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/115421
Appears in Collections:中国科学院大连化学物理研究所_期刊论文

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作者单位: 1.Chinese Acad Sci, Dalian Inst Chem Phys, Dalian 116023, Liaoning Prov, Peoples R China
2.Dalian Jiaotong Univ, Coll Environm & Chem Engn, Dalian 116028, Liaoning Prov, Peoples R China

Recommended Citation:
Tian Ying,Yan Jing-Wang,Xue Rong,et al. Influence of Electrolyte Concentration and Temperature on the Capacitance of Activated Carbon[J]. ACTA PHYSICO-CHIMICA SINICA,2011,27(2):479-485.
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