UM
New insight into the effect of fluorine doping and oxygen vacancies on electrochemical performance of Co 2 MnO 4 for flexible quasi-solid-state asymmetric supercapacitors
Liu S.3; Yin Y.3; Ni D.4; Hui K.S.6; Ma M.1; Park S.3; Hui K.N.2; Ouyang C.-Y.4; Jun S.C.3
2019
Source PublicationEnergy Storage Materials
ISSN24058297
AbstractAnion doping and oxygen-defect creation have been extensively employed to modify the electronic properties and increase concentration of electrochemically active sites of electrode materials for electrical energy storage technologies; however, comprehensive study of the roles of anion doping and oxygen vacancy on the enhancement of electrochemical performance is not clear. Herein, we provide new insight into the effect of fluorine dopant and oxygen vacancy on electrochemical performance of fluorine-doped oxygen-deficient Co MnO (F-Co MnO ) nanowires grown on carbon fiber (CF) as advanced electrode materials for supercapacitor. An experimental and theoretical study reveals that the structural and electronic properties in F-Co MnO is effectively tuned by introducing F dopants and oxygen vacancies, synergistically increasing electrical conductivity and providing rich Faradaic redox chemistry. The resultant F-Co MnO achieves a high specific capacity of 269 mA h g at 1 A g , and superior cyclic stability with 93.2% capacity retention after 5000 cycles at 15 A g . A flexible quasi-solid-state asymmetric supercapacitor (ASC) is constructed with F-Co MnO /CF as the positive electrode and Fe O /CF as the negative electrode. The ASC device exhibits a high energy density of 64.4 W h kg at a power density of 800 W kg . Significantly, the device yields 89.9% capacitance retention after 2000 bending tests at a bending angle ranging from 0 to 30°, demonstrating the high integration of excellent mechanical flexibility and cycling stability.
KeywordCo 2 MnO 4 Density functional theory calculations Flexible quasi-solid-state asymmetric supercapacitor Fluorine doping Oxygen vacancies
DOI10.1016/j.ensm.2019.02.014
URLView the original
Language英語
Fulltext Access
Citation statistics
Document TypeJournal article
CollectionUniversity of Macau
Affiliation1.Shenzhen Institute of Advanced Technology
2.Universidade de Macau
3.Yonsei University
4.Jiangxi Normal University
5.Guilin University of Electronic Technology
6.University of East Anglia
Recommended Citation
GB/T 7714
Liu S.,Yin Y.,Ni D.,et al. New insight into the effect of fluorine doping and oxygen vacancies on electrochemical performance of Co 2 MnO 4 for flexible quasi-solid-state asymmetric supercapacitors[J]. Energy Storage Materials,2019.
APA Liu S..,Yin Y..,Ni D..,Hui K.S..,Ma M..,...&Jun S.C..(2019).New insight into the effect of fluorine doping and oxygen vacancies on electrochemical performance of Co 2 MnO 4 for flexible quasi-solid-state asymmetric supercapacitors.Energy Storage Materials.
MLA Liu S.,et al."New insight into the effect of fluorine doping and oxygen vacancies on electrochemical performance of Co 2 MnO 4 for flexible quasi-solid-state asymmetric supercapacitors".Energy Storage Materials (2019).
Related Services
Recommend this item
Bookmark
Usage statistics
Export to Endnote
Google Scholar
Similar articles in Google Scholar
[Liu S.]'s Articles
[Yin Y.]'s Articles
[Ni D.]'s Articles
Baidu academic
Similar articles in Baidu academic
[Liu S.]'s Articles
[Yin Y.]'s Articles
[Ni D.]'s Articles
Bing Scholar
Similar articles in Bing Scholar
[Liu S.]'s Articles
[Yin Y.]'s Articles
[Ni D.]'s Articles
Terms of Use
No data!
Social Bookmark/Share
All comments (0)
No comment.
 

Items in the repository are protected by copyright, with all rights reserved, unless otherwise indicated.