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| 1 | Fast, green microwave-assisted synthesis of single crystalline Sb_2Se_3 nanowires towards promising lithium storage显示文摘In this work, a fast(0.5 h), green microwave-assisted synthesis of single crystalline Sb_2Se_3 nanowires was developed. For the first time we demonstrated a facile solvent-mediated process, whereby intriguing nanostructures including antimony selenide(Sb_2Se_3) nanowires and selenium(Se) microrods can be achieved by merely varying the volume ratio of ethylene glycol(EG) and H_2O free from expensive chemical and additional surfactant. The achieved uniform Sb_2Se_3 nanowire is single crystalline along [001]growth direction with a diameter of 100 nm and a length up to tens of micrometers. When evaluated as an anode of lithium-ion battery, Sb_2Se_3 nanowire can deliver a high reversible capacity of 650.2 m Ah g^(-1) at 100 mA g^(-1) and a capacity retention of 63.8% after long-term 1000 cycles at 1000 mA g^(-1), as well as superior rate capability(389.5 m Ah g^(-1) at 2000 mA g^(-1)). This easy solvent-mediated microwave synthesis approach exhibits its great universe and importance towards the fabrication of high-performance metal chalcogenide electrode materials for future low-cost, large-scale energy storage systems. | Wen Luo Jean-Jacques Gaumet Pierre Magri Sébastien Diliberto Feng Li Pascal Franchetti Jaafar Ghanbaja Liqiang Mai | 2019 | Journal of Energy Chemistry2019，28，3： | 3 |
| 2 | Novel lead-free BCZT-based ceramic with thermally-stable recovered energy density and increased energy storage efficiency显示文摘The eco-responsible lead-free piezoelectric ceramics have been intensively searched for more than adecade, however, the final goal to replace toxic ceramics like lead zirconate titanate (PZT) with lead-freecompounds, having comparable or even better performance has not yet been reached. In this road, thelead-free ceramics Ba_(0.85)Ca_(0.15)Zr_(0.1)Ti_(0.9)O_(3) (BCZT), possessing excellent dielectric, ferroelectric, andpiezoelectric properties are regarded as serious candidates for the PZT replacement. Besides, nano-structuring BCZT is of paramount importance to enhance these functionalities even more. Here, BCZTmultipodes are designed by template-growth hydrothermal synthesis using hydrogen zirconate titanatenanowires. We demonstrate that the fabricated BCZT multipodes exhibit high dielectric permittivity of5300 with a temperature stability coefficient of ±5.9% between 20 and 140℃. A significant recoveredenergy density of 315.0 mJ/cm^(3) with high thermal stability and high energy storage efficiency of 87.4%,and enhanced large-signal piezoelectric coefficient d^(*)_(33) (310 pm/V) are found. Compared to the tradi-tional BCZT ceramics reported in the literature, relying on high-temperature processing, our sampleexhibits boosted energy storage parameters at a much lower temperature. These outcomes may offer anew strategy to tailor eco-responsible relaxor ferroelectrics toward superior energy storage performancefor ceramic capacitor applications. | Zouhair Hanani Soukaina Merselmiz M'barek Amjoud Daoud Mezzane Mohammed Lahcini Jaafar Ghanbaja Matjaz Spreitzer Damjan Vengust Mimoun El Marssi Igor A.Luk'yanchuk Zdravko Kutnjak Brigita Rozic Mohamed Goune | 2022 | Journal of Materiomics2022，8，4： | 0 |
| 3 | Synthesis of Ag and Cd nanoparticles by nanosecond-pulsed discharge in liquid nitrogen显示文摘The synthesis of CdO, Ag2O (5nm) and Ag (~20~30 nm) nano-objects is achieved simultaneously by nanosecond-pulsed discharges in liquid nitrogen between one cadmium electrode and one silver electrode. Oxidation occurs when liquid nitrogen is fully evaporated and nanoparticles are in contact with the air. No alloy is formed, whatever the conditions, even though both elements are present simultaneously, as showed by timeresolved optical emission spectroscopy. This lack of reactivity between elements is attributed to the high pressure within the discharge that keeps each metallic vapor around the electrode it comes from. Each element exhibits a specific behavior. Cubic Cd particles, formed at 4 kV, get elongated with filamentary tips when the applied voltage reaches 7 and 10 kV. Cd wires are formed by assembly in liquid nitrogen of Cd nanoparticles driven by dipole assembly, and not by dielectrophoresis. On the contrary, silver spherical particles get assembled into 2D dendritic structures. The anisotropic growth of these structures is assumed to be due to the existence of pressure gradients. | Mahmoud Trad Alexandre Nominé Natalie Tarasenka Jaafar Ghanbaja Cédric Noel Malek Tabbal Thierry Belmonte | 2019 | Frontiers of Chemical Science and Engineering2019，13，2： | 0 |
| 4 | Synthesis of two-dimensional lead sheets by spark discharge in liquid nitrogen显示文摘A simple method to synthesise hexagonal lead sheets,which belong to the class of two-dimensional materials,is proposed.These objects are collected on a substrate located under two lead electrodes, between which nanosecond-pulsed spark discharges are ignited in liquid nitrogen.The hexagonal sheets are single crystals produced by gas phase condensation.Once nitrogen completely evaporates,the sheets change to PbO2by oxidation in air.The oxidation process induces stress that pleats the uppermost sheets or open cracks at the centre.The thickness of the individual objects typically varies from 4to 20nm.When the number of discharges is more than about 2000,in addition to sheets,two types of PbO2 sticks start to form:bundles composed of nanosticks (length 5p.m and diameter 50nm)and isolated sticks (length 20μm and diameter 500nm).These new nanostructures mainly form because of the way the discharge erodes the lead electrodes.Initially,anisotropic erosion driven by the orientation of the crystallographic planes of the lead crystals produces octahedra and nanosticks,and the nanosticks grow on the electrode surfaces as discharge proceeds.After about 2000discharges,the nanosticks are sufficiently long that they can be easily broken,probably by mechanical stress,and they fall onto the underlying substrate. | Ahmad Hamdan Hiba Kabbara Cedric Noel Jaafar Ghanbaja Abdelkrim Redjaimia Thierry Belmonte | 2018 | Particuology2018，16，5： | 0 |
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