Synthesis and structure determination of potassium copper selenide   nanowires and solid-state supercapacitor application

doi:10.1016/j.jpowsour.2014.06.079

CORC > 北京大学 > 化学与分子工程学院

	Synthesis and structure determination of potassium copper selenide nanowires and solid-state supercapacitor application
	Zhang, Kaiyou ; Chen, Hong ; Wang, Xue ; Guo, Donglin ; Hu, Chenguo ; Wang, Shuxia ; Sun, Junliang ; Leng, Qiang
刊名	电源杂志
	2014
关键词	Potassium copper selenide Nanowire Supercapacitor Vanadium pentoxide HYDROXIDE-MEDIATED METHOD CHARGE-DENSITY WAVES ELECTROCHEMICAL CAPACITORS ELECTRODE MATERIAL CRYSTAL-STRUCTURE ENERGY-STORAGE COMPOSITE METAL K3CU8S6 TEMPERATURE
DOI	10.1016/j.jpowsour.2014.06.079
英文摘要	The new ternary alkali metal copper chalcogenide KCu4Se8 nanowires with average length of 30 mu m are synthesized using a modified composite-hydroxide mediated (M-CHM) approach. The prepared KCu4Se8 is characterized by XRD, EDS, FESEM and TEM analysis. The structure is determined by the newly developed Rotation Electron Diffraction technique. It is identified to be a body center tetragonal phase. The prepared KCu4Se8 is used to fabricate solid-state supercapacitors in which the thin film of the electrodes are made with pressure of 0 MPa, 5 MPa and 10 MPa, and their electrochemical properties are tested. It is found that 0 MPa supercapacitor displays best electrochemical performance and the specific capacitance of 25.3 F g(-1) is obtained at the scan rate of 5 mV s(-1). It also shows good long-term cycle property by recording 5000 cycles of galvanostatic charge/discharge operation. The specific capacitance can be enhanced to 93.7 F g(-1) at the scan rate of 5 mV s(-1) by coating 0.1 mg V2O5 nanowire on 0 MPa KCu4Se8 electrode. (C) 2014 Elsevier B.V. All rights reserved.; Electrochemistry; Energy & Fuels; SCI(E); 0; ARTICLE; hucg@cqu.edu.cn; junliang.sun@pku.edu.cn; 522-532; 268
语种	英语
内容类型	期刊论文
源URL	[http://ir.pku.edu.cn/handle/20.500.11897/206858]
专题	化学与分子工程学院
推荐引用方式 GB/T 7714	Zhang, Kaiyou,Chen, Hong,Wang, Xue,et al. Synthesis and structure determination of potassium copper selenide nanowires and solid-state supercapacitor application[J]. 电源杂志,2014.
APA	Zhang, Kaiyou.,Chen, Hong.,Wang, Xue.,Guo, Donglin.,Hu, Chenguo.,...&Leng, Qiang.(2014).Synthesis and structure determination of potassium copper selenide nanowires and solid-state supercapacitor application.电源杂志.
MLA	Zhang, Kaiyou,et al."Synthesis and structure determination of potassium copper selenide nanowires and solid-state supercapacitor application".电源杂志 (2014).