“…Moreover, the pore volume of the CoNiFe-LDH/CNFs-0.5 composite was larger than that of LDH because the introduction of CNFs will promote the crystallisation of CoNiFe-LDH sheets with a smaller size. The pore distribution and large specific surface area of CoNiFe-LDH/CNFs-0.5 composite will provide efficient transport pathways to their interior voids, which was favourable for improving both the PC from LDH and the EDLC from CNFs 6, 39 .Figure 5( a ) Nitrogen adsorption/desorption isotherms of original CNFs, pure CoNiFe-LDH and CoNiFe-LDH/CNFs-0.5 composite; ( b ) the pore size distribution of original CNFs, pure CoNiFe-LDH and CoNiFe-LDH/CNFs-0.5 composite (the inset exhibits the corresponding magnified pore size distribution).
…”
A novel Cobalt Nickle Iron-layered double hydroxide/carbon nanofibres (CoNiFe-LDH/CNFs-0.5) composite was successfully fabricated through an easy in situ growth approach. The morphology and composition of the obtained materials were systematically investigated. When the two derived materials were used for supercapacitor electrodes, the CoNiFe-LDH/CNFs-0.5 composite displayed high specific surface area (114.2 m2 g−1), specific capacitance (1203 F g−1 at 1 A g−1) and rate capability (77.1% from 1 A g−1 to 10 A g−1), which were considerably higher than those of pure CoNiFe-LDH. Moreover, the specific capacitance of CoNiFe-LDH/CNFs-0.5 composite remained at 94.4% after 1000 cycles at 20 A g−1, suggesting excellent long-time cycle life. The asymmetric supercapacitor based on CoNiFe-LDH/CNFs-0.5 as a positive electrode and activated carbon as a negative electrode was manufactured and it exhibited a specific capacitance of 84.9 F g−1 at 1 A g−1 and a high energy density of 30.2 W h kg−1. More importantly, this device showed long-term cycling stability, with 82.7% capacity retention after 2000 cycles at 10 A g−1. Thus, this composite with outstanding electrochemical performance could be a promising electrode material for supercapacitors.
“…Moreover, the pore volume of the CoNiFe-LDH/CNFs-0.5 composite was larger than that of LDH because the introduction of CNFs will promote the crystallisation of CoNiFe-LDH sheets with a smaller size. The pore distribution and large specific surface area of CoNiFe-LDH/CNFs-0.5 composite will provide efficient transport pathways to their interior voids, which was favourable for improving both the PC from LDH and the EDLC from CNFs 6, 39 .Figure 5( a ) Nitrogen adsorption/desorption isotherms of original CNFs, pure CoNiFe-LDH and CoNiFe-LDH/CNFs-0.5 composite; ( b ) the pore size distribution of original CNFs, pure CoNiFe-LDH and CoNiFe-LDH/CNFs-0.5 composite (the inset exhibits the corresponding magnified pore size distribution).
…”
A novel Cobalt Nickle Iron-layered double hydroxide/carbon nanofibres (CoNiFe-LDH/CNFs-0.5) composite was successfully fabricated through an easy in situ growth approach. The morphology and composition of the obtained materials were systematically investigated. When the two derived materials were used for supercapacitor electrodes, the CoNiFe-LDH/CNFs-0.5 composite displayed high specific surface area (114.2 m2 g−1), specific capacitance (1203 F g−1 at 1 A g−1) and rate capability (77.1% from 1 A g−1 to 10 A g−1), which were considerably higher than those of pure CoNiFe-LDH. Moreover, the specific capacitance of CoNiFe-LDH/CNFs-0.5 composite remained at 94.4% after 1000 cycles at 20 A g−1, suggesting excellent long-time cycle life. The asymmetric supercapacitor based on CoNiFe-LDH/CNFs-0.5 as a positive electrode and activated carbon as a negative electrode was manufactured and it exhibited a specific capacitance of 84.9 F g−1 at 1 A g−1 and a high energy density of 30.2 W h kg−1. More importantly, this device showed long-term cycling stability, with 82.7% capacity retention after 2000 cycles at 10 A g−1. Thus, this composite with outstanding electrochemical performance could be a promising electrode material for supercapacitors.
“…In the past few years, many studies have focused on combining graphene with metal oxides or hydroxides [9,[12][13][14][15][16], conducting polymers [12,[17][18][19], and other activated carbon materials [20,21]. Among the conducting polymers, polyaniline (PANI) and poly (3-hexylthiophene) (P3HT), which have the characteristic property of donating electrons, have recently been used in SC applications [17,18].…”
In this paper, a simple dip-coating technique is used to deposit a P3HT:PCBM/Nickel Aluminum layered double hydroxide-graphene foam (NiAl-LDH-GF) composite onto a nickel foam (NF) serving as a current collector. A self-organization of the polymer chains is assumed on the Ni-foam grid network during the slow "dark" drying process in normal air.Electrochemical cyclic voltammetry (CV) and constant charge-discharge (CD) measurements show an improvement in the supercapacitive behavior of the pristine P3HT:PCBM by an order of magnitude from 0.29 F cm -2 (P3HT:PCBM nanostructures) to 1.22 F cm -2 (P3HT:PCBM/NiAl-LDH-GF composite structure) resulting from the addition of NiAl-LDH-GF material at a current density of 2 mA cm -2 . This capacitance retention after cycling at 10 mA cm -2 also demonstrates the electrode material's potential for supercapacitor applications.
“…7b shows galvanostatic charge-discharge curves of sample Co(OH) 2 -DS and Co(OH) 2 -NO 3 at a current density of 1 A g À1 . The specific capacitance was measured by chronopotentiometry and calculated by the discharge curve according to the following equation [43,44] …”
Section: Electrochemical Properties Of Sample Co(oh) 2 -Ds and Co(oh)mentioning
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