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dc.contributor.authorN, Priyadharsini-
dc.contributor.authorR, Kalaiselvan-
dc.date.accessioned2020-10-01T11:10:06Z-
dc.date.available2020-10-01T11:10:06Z-
dc.date.issued2017-08-20-
dc.identifier.issn0013-4686-
dc.identifier.urihttps://www.sciencedirect.com/science/article/pii/S0013468617313385-
dc.identifier.urihttp://localhost:8080/xmlui/handle/123456789/1932-
dc.description.abstractA facile sol-gel thermolysis route was adopted to synthesize KNiPO4 nano-sheets for the design of hybrid supercapacitors. The phase purity, homogeneity, and functional groups present in the synthesized KNiPO4 were characterized through X-ray diffraction and FTIR measurements. Field emission scanning electron microscopy (FESEM) and transmission electron microscopy (TEM) images showed that the nano-sheet-like particles were loosely stacked. The electrochemical properties of the KNiPO4 electrode were studied in various aqueous-based electrolytes such as 1 M LiOH, 1 M NaOH, and 1 M KOH to explore their superior performances. Among these electrolytes, the KNiPO4 electrode provided a maximum specific capacity of 278 C g−1 in 1 M KOH at 5 mV s−1. A hybrid supercapacitor was fabricated using the synthesized KNiPO4 as the positive electrode and activated carbon as the negative electrode in a 1 M KOH aqueous electrolyte. The supercapacitor exhibited a specific capacitance of 48 F g−1 in 1 M KOH at 0.6 mA cm−2 and energy density of 13 Wh kg−1 at a power density of 59 W kg−1. In addition, the hybrid system retained 93% of its initial specific capacitance even after 2000 cycles. A KNiPO4-based hybrid system thus exhibits superior characteristics and hence is a promising candidate for high-performance electrochemical energy storage devices.en_US
dc.language.isoenen_US
dc.publisherElsevieren_US
dc.subjectHybrid supercapacitoren_US
dc.subjectsol-gel thermolysisen_US
dc.subjectspecific capacitance energy densityen_US
dc.titleNANO-SHEET-LIKE KNIPO4 AS A POSITIVE ELECTRODE MATERIAL FOR AQUEOUS HYBRID SUPERCAPACITORSen_US
dc.typeArticleen_US
Appears in Collections:International Journals

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