Improving supercapacitor capacitance by using a novel gel nanocomposite polymer electrolyte based on nanostructured SiO2, PVDF and imidazolium ionic liquid

Ortega, Paulo F.R.; Trigueiro, João Paulo C.; Silva, Glaura G.; Lavall, Rodrigo L.

doi:10.1016/j.electacta.2015.12.056

Cited by 110 publications

(53 citation statements)

References 36 publications

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“…Improving the specific capacitance may be due to the high conductivity of carbon black. A similar study was done by Ortega et al ., reported specific capacitance of around 41 Fg – for gel polymer electrodes (GPE) containing PVdF.…”

Section: Resultssupporting

confidence: 65%

“…As initially expected, carbon black failed to provide appreciable thermal stability. However, some initial thermal stability was observed in all samples compared to pure PVdF …”

Section: Resultsmentioning

confidence: 89%

“…According to the results, all nanofibers underwent single‐step degradation between approximately 440 and 450 °C. For pure PVdF, generally initial degradation occurs at 400 °C . Addition of carbon black provides initial stability and PVdF/PVP shows high stability up to 450 °C .…”

Section: Resultsmentioning

confidence: 99%

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Investigating the thermal, mechanical, and electrochemical properties of PVdF/PVP nanofibrous membranes for supercapacitor applications

Jabbarnia

Khan

Ghazinezami

et al. 2016

J of Applied Polymer Sci

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Polyvinylidene fluoride and polyvinylpyrrolidone polymers incorporated with carbon black nanoparticles (50 nm) were electrospun to fabricate nanofibrous membranes for supercapacitor separators. Different weight percentages (0, 0.25, 0.5, 1, 2, and 4 wt %) of carbon black nanoparticles were dispersed in N,N-dimethylacetamide and acetone prior to the electrospinning processes at various voltage, pump speed, and tip-to-collector distances. The morphology, thermal, mechanical, hydrophobic, and electrochemical characterization of nanofibrous membrane were analyzed using different techniques, such as scanning electron microscopy, differential scanning calorimetry, capacitance bridge, thermogravimetric analysis, dynamic mechanical analyzer, and water contact angle. Effects of annealing and UV irradiation exposures on the nanofibrous membranes were investigated in detail. Test results revealed that the physical properties of the nanocomposite separators were significantly enhanced as a function of carbon black inclusions in the polymeric structures, which may be useful for the applications of supercapacitor separators and other energy storage devices.

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Section: Resultssupporting

confidence: 65%

“…As initially expected, carbon black failed to provide appreciable thermal stability. However, some initial thermal stability was observed in all samples compared to pure PVdF …”

Section: Resultsmentioning

confidence: 89%

See 1 more Smart Citation

Investigating the thermal, mechanical, and electrochemical properties of PVdF/PVP nanofibrous membranes for supercapacitor applications

Jabbarnia

Khan

Ghazinezami

et al. 2016

J of Applied Polymer Sci

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“…Organic electrolytes have been the most widely used in commercial SCs, mainly due to their relatively high voltage window, although environmental and security issues and cost are a major concern [20]. Finally, ionic liquids are the most promising electrolytes as they can operate at even higher voltages, but their high viscosities and large ionic size limit their power density and their high cost must also be taken into consideration [20][21][22][23].…”

Section: Introductionmentioning

confidence: 99%

Biliquid Supercapacitors: a Simple and New Strategy to Enhance Energy Density in Asymmetric/Hybrid Devices

Ortega

González

Blanco

et al. 2017

Electrochimica Acta

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A novel strategy for the development of high energy density supercapacitors (SC) is explored. The new devices contain two electrolytes that are different in nature, an aqueous electrolyte in one half-cell and an ionic liquid in the other. These systems, referred to as biliquid SCs, make it possible to combine the best electrode/electrolyte in terms of individual electrode capacitance and cathodic/anodic stability limits.Furthermore, other asymmetries that combine different electrodes, electrolytes and storage mechanisms can be incorporated. Synchronous cyclic chronopotenciometry was used to monitor the performance of these novel complex systems. It is expected that this approach will help scientists working in this field to develop new devices that overcome the energy density limitations of current SCs, thereby extending the scope of their application.

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“…To obtain high performance composite materials, the dispersion and interfacial compatibility of the added particles in the polymer phase must be improved . The surface properties of the particles can be improved with a silane coupling agent, and then styrene (St) and methyl methacrylate (MMA) are grafted onto the nanoparticles, which can further increase their hydrophobicity and enhance the functional effect of the polymer matrix and copolymer.…”

Section: Introductionmentioning

confidence: 99%

Preparation and performance study on P(St‐MMA)‐SiO₂ doped P(VDF‐HFP) based composite polymer electrolyte

Wang

Miao

Yan

et al. 2016

Polymer International

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The organic-inorganic hybrid material poly(styrene-methyl methacrylate)-silica (P(St-MMA)-SiO 2 ) was successfully prepared by in situ polymerization confirmed by Fourier transform infrared spectroscopy and was employed to fabricate poly(vinylidene fluoride-hexafluoropropylene) (P(VDF-HFP)) based composite polymer electrolyte (CPE) membrane. Desirable CPEs can be obtained by immersing the CPE membranes into 1.0 mol L −1 LiPF 6 -EC/DMC/EMC (LiPF 6 ethylene carbonate + dimethyl carbonate + ethylmethyl carbonate) liquid electrolyte for about 0.5 h for activation. The corresponding physicochemical properties were characterized by SEM, XRD, electrochemical impedance spectroscopy and charge-discharge cycle testing measurements.The results indicate that the as-prepared CPEs have excellent properties when the mass ratio of the hybrid P(St-MMA)-SiO 2 particles to polymer matrix P(VDF-HFP) reaches 1:10, at which point the SEM analyses show that the as-prepared P(St-MMA)-SiO 2 particles are uniformly dispersed in the membrane and the CPE membrane presents a homogeneous surface with abundant interconnected micropores. The XRD results show that there may exist interaction forces between the P(St-MMA)-SiO 2 particles and the polymer matrix, which can obviously decrease the crystallinity of the composite membrane. Moreover, the ionic conductivity at room temperature and the electrochemical working window of the CPE membrane can reach 3.146 mS cm −1 and 4.7 V, respectively. The assembled LiCoO 2 /CPE/Li coin cell with the CPE presents excellent charge-discharge and C-rate performance, which indicates that P(St-MMA)-SiO 2 hybrid material is a promising additive for the P(VDF-HFP) based CPE of the lithium ion battery.

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Improving supercapacitor capacitance by using a novel gel nanocomposite polymer electrolyte based on nanostructured SiO2, PVDF and imidazolium ionic liquid

Cited by 110 publications

References 36 publications

Investigating the thermal, mechanical, and electrochemical properties of PVdF/PVP nanofibrous membranes for supercapacitor applications

Investigating the thermal, mechanical, and electrochemical properties of PVdF/PVP nanofibrous membranes for supercapacitor applications

Biliquid Supercapacitors: a Simple and New Strategy to Enhance Energy Density in Asymmetric/Hybrid Devices

Preparation and performance study on P(St‐MMA)‐SiO₂ doped P(VDF‐HFP) based composite polymer electrolyte

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Improving supercapacitor capacitance by using a novel gel nanocomposite polymer electrolyte based on nanostructured SiO2, PVDF and imidazolium ionic liquid

Cited by 110 publications

References 36 publications

Investigating the thermal, mechanical, and electrochemical properties of PVdF/PVP nanofibrous membranes for supercapacitor applications

Investigating the thermal, mechanical, and electrochemical properties of PVdF/PVP nanofibrous membranes for supercapacitor applications

Biliquid Supercapacitors: a Simple and New Strategy to Enhance Energy Density in Asymmetric/Hybrid Devices

Preparation and performance study on P(St‐MMA)‐SiO2 doped P(VDF‐HFP) based composite polymer electrolyte

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Product

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Preparation and performance study on P(St‐MMA)‐SiO₂ doped P(VDF‐HFP) based composite polymer electrolyte