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	Asymmetric Activated Carbon-Manganese Dioxide Capacitors in Mild Aqueous Electrolytes Containing Alkaline-Earth Cations
	Xu, Chengjun ; Du, Hongda ; Li, Baohua ; Kang, Feiyu ; Zeng, Yuqun
	2010-10-12 ; 2010-10-12
关键词	carbon current density electrolytes manganese compounds supercapacitors CHARGE STORAGE MECHANISM ELECTROCHEMICAL CAPACITORS ENERGY-STORAGE OXIDE ULTRACAPACITORS SUPERCAPACITORS IMPEDANCE BEHAVIOR FILMS Electrochemistry Materials Science, Coatings & Films
中文摘要	Manganese dioxide exhibits the ideal capacitive behavior in aqueous electrolytes containing alkaline-earth cations (Mg2+, Ca2+, or Ba2+). A specific capacitance value as high as 325 F g(-1) was obtained in 0.1 mol L-1 Mg(NO3)(2) electrolyte at 2 mV s(-1). The ideal capacitive behavior, high specific capacitance, good coulombic efficiency, and rate ability of manganese dioxides in aqueous electrolytes containing bivalent cations (Mg2+, Ca2+, or Ba2+) indicate that these alkaline-earth cations might be good alternatives for the state-of-the-art univalent alkaline cations. Moreover, activated carbon/MnO2 asymmetric capacitors with 2 V operating voltage were built up based on the aqueous electrolytes containing these alkaline-earth cations. The energy density of the AC/MnO2 asymmetric capacitor with Ca2+ cation at a current density of 0.3 A g(-1) was found to be 21 Wh Kg(-1).
语种	英语 ; 英语
出版者	ELECTROCHEMICAL SOC INC ; PENNINGTON ; 65 SOUTH MAIN STREET, PENNINGTON, NJ 08534 USA
内容类型	期刊论文
源URL	[http://hdl.handle.net/123456789/81733]
专题	清华大学
推荐引用方式 GB/T 7714	Xu, Chengjun,Du, Hongda,Li, Baohua,et al. Asymmetric Activated Carbon-Manganese Dioxide Capacitors in Mild Aqueous Electrolytes Containing Alkaline-Earth Cations[J],2010, 2010.
APA	Xu, Chengjun,Du, Hongda,Li, Baohua,Kang, Feiyu,&Zeng, Yuqun.(2010).Asymmetric Activated Carbon-Manganese Dioxide Capacitors in Mild Aqueous Electrolytes Containing Alkaline-Earth Cations..
MLA	Xu, Chengjun,et al."Asymmetric Activated Carbon-Manganese Dioxide Capacitors in Mild Aqueous Electrolytes Containing Alkaline-Earth Cations".(2010).

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