All-solid-state batteries represent the next generation of electrochemical energy storage systems. A tin-carbon nanocomposite material is prepared by the electrospinning technique and employed as candidate anode material in such devices.... more
All-solid-state batteries represent the next generation of electrochemical energy storage systems. A tin-carbon nanocomposite material is prepared by the electrospinning technique and employed as candidate anode material in such devices. The as-prepared material has been structurally and morphologically characterized. The electrochemical characterization of the Sn(nano)/C composite showed also good electrochemical reversibility, and stability upon 100 galvanostatic cycle experiments with a quite stable interface, as highlighted by impedance spectroscopy experiments.
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Fe3O4 nanoparticles synthesized by a base catalyzed method are tested in an All-Solid-State (ASLB) battery using a sulfide electrolyte. The pristine nanoparticles were morphologically characterized showing an average size of 12 nm. The... more
Fe3O4 nanoparticles synthesized by a base catalyzed method are tested in an All-Solid-State (ASLB) battery using a sulfide electrolyte. The pristine nanoparticles were morphologically characterized showing an average size of 12 nm. The evaluation of the electrochemical properties shows high specific capacity values of 506 mAhg−1 after 350 cycles at a specific current of 250 mAg−1, with very high stability and coulombic efficiency.
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In this work, the synthesis, characterization, and application of novel parabens imprinted polymers as highly selective solid-phase extraction (SPE) sorbents have been reported. The imprinted polymers were created using sol–gel molecular... more
In this work, the synthesis, characterization, and application of novel parabens imprinted polymers as highly selective solid-phase extraction (SPE) sorbents have been reported. The imprinted polymers were created using sol–gel molecular imprinting process. All the seven parabens were considered herein in order to check the phase selectivity. By means of a validated HPLC-photodiode array detector (PDA) method all seven parabens were resolved in a single chromatographic run of 25 min. These SPE sorbents, in-house packed in SPE empty cartridges, were first characterized in terms of extraction capability, breakthrough volume, retention volume, hold-up volume, number of theoretical plates, and retention factor. Finally, the device was applied to a real urine sample to check the method feasibility on a very complex matrix. The new paraben imprinted SPE sorbents, not yet present in the literature, potentially encourage the development of novel molecularly imprinted polymers (MIPs) to enha...
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This paper reports the performance comparison between the exhaustive and equilibrium extraction using classical Avantor C18 solid phase extraction (SPE) sorbent, hydrophilic-lipophilic balance (HLB) SPE sorbent, Sep-Pak C18 SPE sorbent,... more
This paper reports the performance comparison between the exhaustive and equilibrium extraction using classical Avantor C18 solid phase extraction (SPE) sorbent, hydrophilic-lipophilic balance (HLB) SPE sorbent, Sep-Pak C18 SPE sorbent, novel sol-gel Carbowax 20M (sol-gel CW 20M) SPE sorbent, and sol-gel CW 20M coated fabric phase sorptive extraction (FPSE) media for the simultaneous extraction and analysis of three inflammatory bowel disease (IBD) drugs that possess logP values (polarity) ranging from 1.66 for cortisone, 2.30 for ciprofloxacin, and 2.92 for sulfasalazine. Both the commercial SPE phases and in-house synthesized sol-gel CW 20M SPE phases were loaded in SPE cartridges and the extractions were carried out under an exhaustive extraction mode. FPSE was carried out under an equilibrium extraction mode. The drug compounds were resolved using a Luna C18 column (250 mm × 4.6 mm; 5 m particle size) in gradient elution mode within 20 min and the method was validated in compli...
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PURPOSE: A polymeric electrolyte membrane for use in lithium battery, which has a improved stability and lithium ion conductivity, and which comprises ceramic materials selected from group consisting of aluminum oxide, silicon oxide,... more
PURPOSE: A polymeric electrolyte membrane for use in lithium battery, which has a improved stability and lithium ion conductivity, and which comprises ceramic materials selected from group consisting of aluminum oxide, silicon oxide, titanium oxide, zirconium oxide and mixture thereof. CONSTITUTION: The polymeric electrolyte membrane is based on polymer selected from group consisting of polyacrylonitril, polymethyl methacrylate, polyvinyl chloride, polyvinyl sulfone, polyethylene glycol diacrylate, polyvinyl pyrrolidone, polyvinylidene fluoride and mixture thereof, and comprises ceramic materials selected from group consisting of aluminum oxide, silicon oxide, titanium oxide, zirconium oxide and mixture thereof. The concentration of ceramic material is 5-7 weight% based on weight of the membrane. The membrane is used in electrochemical cell and secondary lithium battery.
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Dispersions of single-walled carbon nanotubes (SWNTs) have been prepared by using the room-temperature ionic liquid [BMIM][BF4 ] (1-butyl-3-methylimidazolium tetrafluoroborate), the triblock copolymer Pluronic L121 [poly(ethylene oxide)5... more
Dispersions of single-walled carbon nanotubes (SWNTs) have been prepared by using the room-temperature ionic liquid [BMIM][BF4 ] (1-butyl-3-methylimidazolium tetrafluoroborate), the triblock copolymer Pluronic L121 [poly(ethylene oxide)5 -poly(propylene oxide)68 -poly(ethylene oxide)5 ] and the non-ionic surfactant Triton X-100 (TX100) in the pure state. The size of the SWNTs aggregates and the dispersion degree in the three viscous systems depend on the sonication time, as highlighted by UV/Vis/NIR spectroscopy and optical microscopy analysis. A nonlinear increase in conductivity can be observed as a function of the SWNTs loading, as suggested by electrochemical impedance spectroscopy. The generation of a three-dimensional network of SWNTs showing a viscoelastic gel-like behavior above a critical percolation concentration has been found at 25 °C in all the investigated systems by oscillatory rheology measurements.
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Solid polymer electrolytes, in the form of membranes, offering high chemical and mechanical stability, while maintaining good ionic conductivity, are envisaged as a possible solution to improve performances and safety in different lithium... more
Solid polymer electrolytes, in the form of membranes, offering high chemical and mechanical stability, while maintaining good ionic conductivity, are envisaged as a possible solution to improve performances and safety in different lithium cell configurations. In this work, we designed and prepared systems formed using innovative nanocomposite polymer membranes, based on high molecular weight poly(ethylene oxide) (PEO) and silica nanopowders, produced by the electrospinning technique. These membranes were subsequently gelled with solutions based on aprotic ionic liquid, carbonate solvents, and lithium salt. The addition of polysulfide species to the electrolyte solution was also considered, in view of potential applications in lithium-sulfur cells. The morphology of the electrospun pristine membranes was evaluated using scanning electron microscopy. Stability and thermal properties of pristine and gelled systems were investigated uisng differential scanning calorimetry and thermal gr...
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Lipoxin (LX)A4 is a lipoxygenase-formed arachidonic acid metabolite with potent anti-inflammatory, pro-resolution properties. Its therapeutic efficacy has been largely demonstrated in a variety of cellular, preclinical and clinical... more
Lipoxin (LX)A4 is a lipoxygenase-formed arachidonic acid metabolite with potent anti-inflammatory, pro-resolution properties. Its therapeutic efficacy has been largely demonstrated in a variety of cellular, preclinical and clinical models. Among these, periodontal disease, where LXA4 promotes tissue repair, also by modulating functions of human periodontal ligament stem cells (hPDLSCs). As medicated biomembranes may be particularly useful in clinical settings, where local stimulation of tissue repair is needed, we used electrospinning to embed LXA4 in membranes made of poly(ethylene oxide) (PEO) and poly(d,l-lactide) (PDLLA). These membranes were fully characterized by scanning electron microscopy, differential scanning calorimetry and biocompatibility with hPDLSCs. Here, we report that LXA4 is retained in these membranes and that ∼15-20% of the total LXA4 amount added to the reaction can be eluted from the membranes using an aqueous buffered medium. The eluted LXA4 fully retained its capability to stimulate hPDLSC proliferation. A similar effect was obtained by adding directly the LXA4-containing membranes to cells. These results demonstrate for the first time that LXA4 can be incorporated into biomembranes, which may be useful to combat local inflammation and promote tissue repair in selected clinical settings.
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Fe3O4 nanoparticles synthesized by a base catalyzed method are tested in an All-Solid-State (ASLB) battery using a sulfide electrolyte. The pristine nanoparticles were morphologically characterized showing an average size of 12 nm. The... more
Fe3O4 nanoparticles synthesized by a base catalyzed method are tested in an All-Solid-State (ASLB) battery using a sulfide
electrolyte. The pristine nanoparticles were morphologically characterized showing an average size of 12 nm. The evaluation of the
electrochemical properties shows high specific capacity values of 506 mAhg−1 after 350 cycles at a specific current of 250 mAg−1
,
with very high stability and coulombic efficiency.
electrolyte. The pristine nanoparticles were morphologically characterized showing an average size of 12 nm. The evaluation of the
electrochemical properties shows high specific capacity values of 506 mAhg−1 after 350 cycles at a specific current of 250 mAg−1
,
with very high stability and coulombic efficiency.
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The layered oxides, among the wide family of intercalation compounds, have received considerable attention as positive electrode materials in high-energy density lithium and lithium ion batteries. Within this frame LiNiO2 and LiCoO2... more
The layered oxides, among the wide family of intercalation compounds, have received considerable attention as positive electrode materials in high-energy density lithium and lithium ion batteries. Within this frame LiNiO2 and LiCoO2 oxides and their solid solutions have been extensively studied as they (and the LiMn2O4 spinels) are the only known materials able to intercalate reversibly lithium at high cell voltage (3.5-4 V). Recently, solid solutions such as LiNi1-xCoxO2 have attracted the attention as alternative cathodes to the state of art LiCoO2 in commercial rechargeable Li-ion batteries. Here we have used the Complex Sol-Gel Process (CSGP) to prepare LiNi1-xCoxO2 (x= 0, 0.25, 0.5, 0.75, 1). Starting sols were prepared from Li+-(1-x)Ni2+-xCo2+ acetate aqueous solution in two different routes. According to route-A aqueous ammonia was added to a starting solution containing 0.2M ascorbic acid (ASC) on 1 M total Me. According to route B the starting acetate solutions were first a...
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For many years, the related fields of molten salts and ionic liquids have drifted apart, to their mutual detriment. Both molten salts and ionic liquids are liquid salts containing only ions - all that is different is the temperature! Both... more
For many years, the related fields of molten salts and ionic liquids have drifted apart, to their mutual detriment. Both molten salts and ionic liquids are liquid salts containing only ions - all that is different is the temperature! Both fields involve the study of Coulombic fluids for academic and ...
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Transference number measurements were determined by a direct method for LiClO4 solutions in propylene carbonate and acetonitrile at 25°C. A comparison is reported between theoretical calculations of transference numbers using a model... more
Transference number measurements were determined by a direct method for LiClO4 solutions in propylene carbonate and acetonitrile at 25°C. A comparison is reported between theoretical calculations of transference numbers using a model based on the Lee–Wheaton theory with values of conductometric parameters, and thermodynamic ion pairing constants determined from previously reported conductivity data.
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... L. Persi, F. Croce, B. Scrosati, E. Plichta, MA Hendrickson. Abstract. The synthesis and the properties of nanocomposite polymer electrolytes based on low-particle size fillers having a high concentration of surface states are... more
... L. Persi, F. Croce, B. Scrosati, E. Plichta, MA Hendrickson. Abstract. The synthesis and the properties of nanocomposite polymer electrolytes based on low-particle size fillers having a high concentration of surface states are reported. ...
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Page 1. SAGE-Hindawi Access to Research International Journal of Electrochemistry Volume 2011, Article ID 152143, 8 pages doi:10.4061/2011/152143 Research Article An Electrochemical Impedance Spectroscopic Study of the Passive State on... more
Page 1. SAGE-Hindawi Access to Research International Journal of Electrochemistry Volume 2011, Article ID 152143, 8 pages doi:10.4061/2011/152143 Research Article An Electrochemical Impedance Spectroscopic Study of the Passive State on AISI 304 Stainless Steel ...
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This paper describes the synthesis and the properties of a kinetically improved cathode material. The novel aspect of the synthesis is based on a critical step involving the dispersion of metal (eg, copper or silver) at a very low... more
This paper describes the synthesis and the properties of a kinetically improved cathode material. The novel aspect of the synthesis is based on a critical step involving the dispersion of metal (eg, copper or silver) at a very low concentration (1 wt %). This metal addition ...