UM
Facile synthesis of porous CoAl-layered double hydroxide/graphene composite with enhanced capacitive performance for supercapacitors
Zhang L.; Hui K.N.; Hui K.S.; Lee H.
2015
Source PublicationElectrochimica Acta
ISSN134686
Volume186Pages:522
AbstractMany studies reported that layered double hydroxide/graphene composite showed significant aggregation, which limited their electrochemical performance for supercapacitor. Here, a porous highly-uniform CoAl-layered double hydroxide/graphene (G-LDH) composite was fabricated as a supercapacitor electrode material using a simple gas-liquid interfacial method. The results showed that the proposed gas-liquid interfacial method allowed morphological control of CoAl-LDH and reduced the stacking of CoAl-LDH lamellar crystallites on graphene, leading to a porous structure with a specific surface area of 98.2 m2 g-1 and a pore volume of 0.42 cm3 g-1. The G-LDH sample achieved a specific capacitance of 479.2 F g-1 at 1 A g-1 and 341.2 F g-1 at 10 A g-1, which were much higher than those of the pure LDH sample fabricated by the gas-liquid interfacial method and the LDH/graphene sample synthesized by the conventional hydrothermal method. Moreover, the G-LDH composite exhibited long cycle stability with 93.9% of the specific capacitance (380.1 F g-1) retained at 3 A g-1 after 2000 cycles. This study provides a promising approach for the design and synthesis of porous layered double hydroxide/graphene composite with high capacitive performance, and can have potentially applications in energy storage. © 2015 Elsevier Ltd.
KeywordGas-liquid interfacial method Graphene Layered double hydroxide Supercapacitor
DOI10.1016/j.electacta.2015.11.024
URLView the original
Language英语
The Source to ArticleScopus
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Cited Times [WOS]:83   [WOS Record]     [Related Records in WOS]
Document TypeJournal article
CollectionUniversity of Macau
Recommended Citation
GB/T 7714
Zhang L.,Hui K.N.,Hui K.S.,et al. Facile synthesis of porous CoAl-layered double hydroxide/graphene composite with enhanced capacitive performance for supercapacitors[J]. Electrochimica Acta,2015,186:522.
APA Zhang L.,Hui K.N.,Hui K.S.,&Lee H..(2015).Facile synthesis of porous CoAl-layered double hydroxide/graphene composite with enhanced capacitive performance for supercapacitors.Electrochimica Acta,186,522.
MLA Zhang L.,et al."Facile synthesis of porous CoAl-layered double hydroxide/graphene composite with enhanced capacitive performance for supercapacitors".Electrochimica Acta 186(2015):522.
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