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Ultrathin petal-like NiAl layered double oxide/sulfide composites as an advanced electrode for high-performance asymmetric supercapacitors
Li, Lei1; Hui, Kwan San2; Hui, Kwun Nam3; Cho, Young-Rae1
2017-10-07
Source PublicationJOURNAL OF MATERIALS CHEMISTRY A
ISSN2050-7488
Volume5Issue:37Pages:19687-19696
Abstract

Layered double hydroxide (LDH) is an important layer-structured material for supercapacitors because of its versatile compositions, high theoretical capacitance, environmental friendliness, and low cost. However, the high resistivity of this material results in capacity fading, limiting its application in energy storage. Herein, we develop a facile approach to synthesize ultrathin petal-like NiAl layered double oxide/sulfide (LDO/LDS) composites with high electrochemical activity using a hydrothermal reaction followed by a sulfidation process. Scanning electron micrographs show that the petal-like NiAl LDO/LDS composites are as thin as similar to 10 nm with a mean lateral dimension of similar to 1 mm. The NiAl LDO/LDS electrode delivers a remarkably high specific capacitance of 2250.5 F g(-1) at 1 A g(-1) compared with that of NiAl LDH (1740.5 F g(-1) at 1 A g(-1)) and possesses a good cycling stability of 88.9% capacitance retention over 5000 cycles at 5 A g(-1). An asymmetric supercapacitor (ASC) is fabricated using NiAl LDO/LDS and graphene as positive and negative electrodes, respectively. The NiAl LDO/LDS//G ASC exhibits a specific capacitance of 153.3 F g(-1) at 1 A g(-1), a high energy density of 47.9 W h kg(-1) at a power density of 750 W kg(-1), and a reliable cycling stability of 95.68% capacitance retention after 5000 cycles. The results highlight that NiAl LDO/LDS composites are promising materials for energy storage devices with long cycling stability.

DOI10.1039/c7ta06119f
URLView the original
Indexed BySCI
Language英语
WOS Research AreaChemistry ; Energy & Fuels ; Materials Science
WOS SubjectChemistry, Physical ; Energy & Fuels ; Materials Science, Multidisciplinary
WOS IDWOS:000411739700016
PublisherROYAL SOC CHEMISTRY
The Source to ArticleWOS
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Cited Times [WOS]:25   [WOS Record]     [Related Records in WOS]
Document TypeJournal article
CollectionINSTITUTE OF APPLIED PHYSICS AND MATERIALS ENGINEERING
Affiliation1.Pusan Natl Univ, Sch Mat Sci & Engn, San 30 Jangjeon Dong, Busan 609735, South Korea
2.Univ East Anglia, Sch Math, Norwich NR4 7TJ, Norfolk, England
3.Univ Macau, Inst Appl Phys & Mat Engn, Ave Univ, Macau, Peoples R China
Recommended Citation
GB/T 7714
Li, Lei,Hui, Kwan San,Hui, Kwun Nam,et al. Ultrathin petal-like NiAl layered double oxide/sulfide composites as an advanced electrode for high-performance asymmetric supercapacitors[J]. JOURNAL OF MATERIALS CHEMISTRY A,2017,5(37):19687-19696.
APA Li, Lei,Hui, Kwan San,Hui, Kwun Nam,&Cho, Young-Rae.(2017).Ultrathin petal-like NiAl layered double oxide/sulfide composites as an advanced electrode for high-performance asymmetric supercapacitors.JOURNAL OF MATERIALS CHEMISTRY A,5(37),19687-19696.
MLA Li, Lei,et al."Ultrathin petal-like NiAl layered double oxide/sulfide composites as an advanced electrode for high-performance asymmetric supercapacitors".JOURNAL OF MATERIALS CHEMISTRY A 5.37(2017):19687-19696.
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