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Zinc Cobalt Sulfide Microspheres as a High-Performance Electrode Material for Supercapacitors
Gao, Xueyan1; Chang, Qin1; Hong, Juan1; Long, Dayang1; Jin, Guizhen2; Xiao, Xuxian1
2018-12-28
Source PublicationCHEMISTRYSELECT
ISSN2365-6549
Volume3Issue:48Pages:13751-13758
Abstract

Fast charging/discharging rate, sustained cycle life, and high power density are irreplaceable virtues of supercapacitors (SCs), and these merits can be achieved by selecting suitable active materials and designing the rational microstructure. In this work, zinc cobalt sulfde (ZCS) microspheres have been synthesized by a simple two-step method involving an ethylene glycol (EG) mediated solvothermal approach and subsequent sulfidation treatment. The formation mechanism of the microspheres is also proposed in detail by analyzing the time-dependent SEM observations. Compared to ZCS nanosheets, ZCS microspheres achieve better electrochemical storage performance due to their satisfactory mesoporous feature, conductivity, and effective transport/diffusion paths for ions and electrons. When used as the electrode material of supercapacitor, ZCS microspheres not only obtain a large specific capacitance of 1516 F g(-1) (211 mAh g(-1)) at 1 A g(-1) with good rate capability of 1080 F g(-1) (150 mAh g(-1)) at 10 A g(-1), but also exhibit exceptional cycling stability with a capacitance reduced 6% of the initial specific capacitance at 10 A g(-1) after 4000 cycles. An asymmetric supercapacitor using ZCS microspheres as the cathode and activated carbon (AC) as the anode is assembled, which achieves high specific capacitance (489.3 F g(-1)), energy density (152.9 Wh kg(-1)), and power density (750 W kg(-1)) at 1 A g(-1) with the capacitance retention of 79% at 5 A g(-1) after 2000 cycles. This work illustrates the promising application potential of the ZCS microspheres as the electrode material for electrochemical capacitors.

KeywordElectrochemistry Microsphere-like Solvothermal Supercapacitors Zn0.76co0.24s
DOI10.1002/slct.201803095
Language英语
WOS KeywordBinder-free Electrodes ; Lithium-ion Battery ; Facile Synthesis ; Nickel Foam ; Anode Materials ; Charge Storage ; Ni-foam ; Nico2s4 ; Arrays ; Growth
Funding ProjectScience and Technology Plan Project of Hunan Province, China[2015SK20733]
WOS Research AreaChemistry
WOS SubjectChemistry, Multidisciplinary
Funding OrganizationScience and Technology Plan Project of Hunan Province, China
WOS IDWOS:000454534500030
PublisherWILEY-V C H VERLAG GMBH
Citation statistics
Document Type期刊论文
Identifierhttp://ir.ipe.ac.cn/handle/122111/27723
Collection中国科学院过程工程研究所
Corresponding AuthorXiao, Xuxian
Affiliation1.Cent S Univ, Coll Chem & Chem Engn, Changsha 410083, Hunan, Peoples R China
2.Chinese Acad Sci, Inst Proc Engn, CAS Key Lab Green Proc & Engn, Beijing Key Lab Ion Liquids Clean Proc, Beijing 100190, Peoples R China
Recommended Citation
GB/T 7714
Gao, Xueyan,Chang, Qin,Hong, Juan,et al. Zinc Cobalt Sulfide Microspheres as a High-Performance Electrode Material for Supercapacitors[J]. CHEMISTRYSELECT,2018,3(48):13751-13758.
APA Gao, Xueyan,Chang, Qin,Hong, Juan,Long, Dayang,Jin, Guizhen,&Xiao, Xuxian.(2018).Zinc Cobalt Sulfide Microspheres as a High-Performance Electrode Material for Supercapacitors.CHEMISTRYSELECT,3(48),13751-13758.
MLA Gao, Xueyan,et al."Zinc Cobalt Sulfide Microspheres as a High-Performance Electrode Material for Supercapacitors".CHEMISTRYSELECT 3.48(2018):13751-13758.
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