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Band-gap shrinked NiO@Co3O4 nanotubes as high-performance supercapacitor electrodes
Chen, Feng1; Chi, Yuchen1; Zhang, Haifeng2; Ma, Fei3; Qin, Fengxiang1
Corresponding AuthorQin, Fengxiang()
2021-12-25
Source PublicationJOURNAL OF ALLOYS AND COMPOUNDS
ISSN0925-8388
Volume888Pages:11
AbstractNovel band-gap shrinked NiO@Co3O4 nanotube arrays on Ni foam have been fabricated via a two-step synthesis route. Hexagonal NiO nanotube arrays are obtained by electrodeposition of Ni nanoparticles onto ZnO nanoprisms followed by selective dissolution of ZnO. The inside and outside surfaces of the NiO nanotubes are homogeneously covered with Co3O4 nanosheets via hydrothermal treatment, which enlarges the surface area and accelerates electron transferring. Benefiting from the hierarchically hollow structure and the synergistic effects, the obtained NiO@Co3O4 nanotube arrays deliver a superior specific capacitance of 1769.2 F/g at 1 A/g and outstanding cycling stability (87.5% capacitance retention after 10,000 cycles at 20 A/g). Density functional theory calculations reveal that the disappearance of the band-gap of the NiO@Co3O4 composite is one intrinsic reason that the conductivity and the capacitive charge storage performance are enhanced significantly. The as-prepared NiO@Co3O4 nanotube arrays are highly promising electrodes for high-performance supercapacitors. (C) 2021 Elsevier B.V. All rights reserved.
KeywordNanotube arrays Nanosheets Hybrid nanostructure Synergistic effect Band-gap Supercapacitor
Funding OrganizationShi-changxu Innovation Center for Advanced Materials, Institute of Metal Research, Chinese Academy of Sciences ; National Natural Science Foundation of China ; Chinese Academy of Sciences ; Fundamental Research Funds for the Central Universities
DOI10.1016/j.jallcom.2021.161463
Indexed BySCI
Language英语
Funding ProjectShi-changxu Innovation Center for Advanced Materials, Institute of Metal Research, Chinese Academy of Sciences ; National Natural Science Foundation of China[51790484] ; National Natural Science Foundation of China[51671106] ; Chinese Academy of Sciences[ZDBSLY-JSC023] ; Fundamental Research Funds for the Central Universities[30919011404]
WOS Research AreaChemistry ; Materials Science ; Metallurgy & Metallurgical Engineering
WOS SubjectChemistry, Physical ; Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
WOS IDWOS:000705337400003
PublisherELSEVIER SCIENCE SA
Citation statistics
Cited Times:1[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/166541
Collection中国科学院金属研究所
Corresponding AuthorQin, Fengxiang
Affiliation1.Nanjing Univ Sci & Technol, Sch Mat Sci & Engn, Nanjing 210094, Peoples R China
2.Chinese Acad Sci, Inst Met Res, Shenyang 110016, Peoples R China
3.Xi An Jiao Tong Univ, State Key Lab Mech Behav Mat, Xian 710049, Peoples R China
Recommended Citation
GB/T 7714
Chen, Feng,Chi, Yuchen,Zhang, Haifeng,et al. Band-gap shrinked NiO@Co3O4 nanotubes as high-performance supercapacitor electrodes[J]. JOURNAL OF ALLOYS AND COMPOUNDS,2021,888:11.
APA Chen, Feng,Chi, Yuchen,Zhang, Haifeng,Ma, Fei,&Qin, Fengxiang.(2021).Band-gap shrinked NiO@Co3O4 nanotubes as high-performance supercapacitor electrodes.JOURNAL OF ALLOYS AND COMPOUNDS,888,11.
MLA Chen, Feng,et al."Band-gap shrinked NiO@Co3O4 nanotubes as high-performance supercapacitor electrodes".JOURNAL OF ALLOYS AND COMPOUNDS 888(2021):11.
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