Enhanced performance for a high electrical conductive Mo2C electrode based proton ionic liquid electrolytes in supercapacitors

doi:10.1088/2053-1591/aacfc5

	Enhanced performance for a high electrical conductive Mo2C electrode based proton ionic liquid electrolytes in supercapacitors
	Xu, Yan 1; Yang, Qing-Qing 1; Zhang, Wei-Bin 1; Liu, Mao-Cheng 1,2; Kong, Ling-Bin 1,2
刊名	MATERIALS RESEARCH EXPRESS
	2018-07
卷号	5 期号:7
关键词	high conductivity molybdenum carbides proton ionic liquids pseudocapacitance
ISSN号	2053-1591
DOI	10.1088/2053-1591/aacfc5
英文摘要	Carbides present high capacity due to their excellent conductivity as well as fast redox reactions with protons on the surface. Molybdenum carbide (Mo2C), a typical carbide, has been synthesized successfully by calcining amine metal oxide. Served as electrodes for supercapacitors, the energy density is poor due to the narrow operating potential window in aqueous electrolyte (ca. 1.2 V). Whereas proton ionic liquids, a class of novel electrolyte, can expand the operating potential window as well as provide protons for electrochemical reactions, therefore guaranteeing a high energy density and capacitance. 1-ethyl-3-methylimidazolium acetate/acetonitrile (EMIMAc) is a new type proton ionic liquid for supercapacitors. For the Mo2C electrode, the high specific capacitance of 88 F g(-1) was achieved in 2 mol L-1 EMIMAc/AN electrolyte at a current density of 0.5 A g(-1). The Mo2C//AC asymmetric capacitor with an operating voltage of 2.5 V retains 95% of the initial specific capacitance after 1200 cycles and exhibits a high energy density of 44.1 W h kg(-1). The prominent capacitive performance could be attributed to rapid electron transfer and highly exposed active sites of Mo2C nanoflakes. Besides, 1-ethyl-3-methylimidazolium acetate ionic liquid provides wider electrochemical window to ensure large output. The use of EMIMAc/AN electrolyte dramatically improve the energy density of the asymmetric supercapacitors and can be applied to other carbides.
资助项目	National Natural Science Foundation of China[21403099] ; Natural Science Funds for Distinguished Young Scholars of Gansu Province[1606RJDA320]
WOS研究方向	Materials Science
语种	英语
出版者	IOP PUBLISHING LTD
WOS记录号	WOS:000438509400002
状态	已发表
内容类型	期刊论文
源URL	[http://119.78.100.223/handle/2XXMBERH/32567]
专题	材料科学与工程学院省部共建有色金属先进加工与再利用国家重点实验室
通讯作者	Kong, Ling-Bin
作者单位	1.Lanzhou Univ Technol, State Key Lab Adv Proc & Recycling Nonferrous Met, Lanzhou 730050, Gansu, Peoples R China 2.Lanzhou Univ Technol, Sch Mat Sci & Engn, Lanzhou 730050, Gansu, Peoples R China
推荐引用方式 GB/T 7714	Xu, Yan,Yang, Qing-Qing,Zhang, Wei-Bin,et al. Enhanced performance for a high electrical conductive Mo2C electrode based proton ionic liquid electrolytes in supercapacitors[J]. MATERIALS RESEARCH EXPRESS,2018,5(7).
APA	Xu, Yan,Yang, Qing-Qing,Zhang, Wei-Bin,Liu, Mao-Cheng,&Kong, Ling-Bin.(2018).Enhanced performance for a high electrical conductive Mo2C electrode based proton ionic liquid electrolytes in supercapacitors.MATERIALS RESEARCH EXPRESS,5(7).
MLA	Xu, Yan,et al."Enhanced performance for a high electrical conductive Mo2C electrode based proton ionic liquid electrolytes in supercapacitors".MATERIALS RESEARCH EXPRESS 5.7(2018).