The Knowledge Factory - Sur le même thème https://www.cea.fr/drf/english/Pages/News/Scientific-results/2021/in-pb-anodes-for-use-with-mg-ion-batteries.aspx DRF english version en-US https://www.cea.fr/_layouts/15/images/i2i/icon-144x144-1033.png The Knowledge Factory - Sur le même thème https://www.cea.fr/drf/english Rapid screening of lithium-ion battery electrolytes by radiolysis https://www.cea.fr/drf/english/Pages/News/Scientific-results/2022/rapid-screening-of-lithium-ion-battery-electrolytes-by-radiolysis.aspx Researchers at Iramis, CEA-Liten and their partners in Nantes have shown that it is possible to quickly select the best electrolyte for a lithium-ion battery by gamma irradiation. The production of dihydrogen therefore provides a marker of the electrolyte’s performance. Lithium-ion batteries ; Energy storage ; Tools & research instruments general public ; Researchers ; Journalists Iramis Découvertes et avancées ; Scientific result Thu, 20 Oct 2022 10:00:00 GMT An artificial leaf that produces solar hydrogen https://www.cea.fr/drf/english/Pages/News/Scientific-results/2022/an-artificial-leaf-that-produces-solar-hydrogen.aspx Researchers from the CEA-Irig and their Vietnamese partners have developed an artificial leaf capable of converting solar energy into hydrogen, with a 2% conversion yield. This is a promising achievement towards the storage of renewable energy sources! Hydrogen ; Photovoltaic solar power ; Chemistry general public ; Journalists ; Researchers IRIG Découvertes et avancées ; Scientific result Fri, 17 Jun 2022 10:00:00 GMT An enzymatic process for reducing CO2 https://www.cea.fr/drf/english/Pages/News/Scientific-results/2021/An-enzymatic-process-for-reducing-CO2.aspx Researchers from the CEA-Irig and their partners have developed a new enzymatic process for reducing CO2 and oxidizing CO. Efficient and able to operate under mild conditions, it could be used to purify gas from biomass pyrolysis in order to produce fuels or chemical precursors. Bioenergy ; Molecular mechanisms ; Chemistry general public ; Journalists ; Researchers IRIG Découvertes et avancées ; Scientific result Mon, 06 Sep 2021 10:00:00 GMT More durable hybrid membranes for fuel cells https://www.cea.fr/drf/english/Pages/News/Scientific-results/2021/more-durable-hybrid-membranes-for-fuel-cells-.aspx Based in particular on multiscale morphological analyses, researchers at the CEA-Irig have developed a new generation of hybrid proton exchange membranes for fuel cells with promising performance and durability. Energy storage general public ; Journalists ; Researchers IRIG Découvertes et avancées ; Scientific result Tue, 01 Jun 2021 10:00:00 GMT Green chemistry and biofuel: the mechanism of a key photoenzyme decrypted https://www.cea.fr/drf/english/Pages/News/Scientific-results/2021/Green-chemistry-and-biofuel-the-mechanism-of-a-key-photoenzyme-decrypted-.aspx Green Chemistry ; Chemistry ; 3rd generation biofuel ; Microalgae ; Synchrotron ; Laser ; Molecular mechanisms ; Bioenergy Press release Fri, 09 Apr 2021 10:00:00 GMT Corrosion models predict the behavior of radioactive waste stored at depth https://www.cea.fr/drf/english/Pages/News/Scientific-results/2021/corrosion-models-predict-the-behavior-of-radioactive-waste-stored-at-depth.aspx Using an approach combining experimentation, characterization and multi-scale modeling, researchers from Iramis and their partners from the Direction des énergies and Andra have studied the corrosion of glass and metal in particular conditions of radioactive waste storage. Radioactive waste ; Chemistry ; Materials ; Characterisation general public ; Journalists ; Researchers Iramis Scientific result Wed, 03 Feb 2021 11:00:00 GMT Geochemistry reveals ancient trade in cotton between Arabia and India https://www.cea.fr/drf/english/Pages/News/Scientific-results/2021/geochemistry-reveals-ancient-trade-in-cotton-between-arabia-and-india.aspx According to a study carried out by scientists from the LSCE (CEA-CNRS-UVSQ), CNRS and the Muséum national d’histoire naturelle, an isotopic analysis of strontium reveals the Indian origin of archaeological cottons dating from the 2nd-3rd centuries, in southeastern Arabia. Characterisation ; Chemistry ; Environment ; Science & society general public ; Journalists ; Researchers LSCE Scientific result Wed, 27 Jan 2021 11:00:00 GMT In-Pb anodes for use with Mg-ion batteries https://www.cea.fr/drf/english/Pages/News/Scientific-results/2021/in-pb-anodes-for-use-with-mg-ion-batteries.aspx A team from the CEA-Iramis has developed a new negative electrode material for Mg-ion batteries, based on the compound In-Pb. The synergistic action of indium and lead favors a high electrical capacity, to the detriment of the material’s reversibility, which needs to be further investigated. Batteries ; Chemistry ; Energy storage general public ; Journalists ; Researchers Iramis Scientific result Mon, 14 Dec 2020 11:00:00 GMT A new process for making antibacterial food films https://www.cea.fr/drf/english/Pages/News/Scientific-results/2020/a-new-process-for-making-antibacterial-food-films.aspx Chemists working at Iramis and their partners have developed a new process for producing an antibacterial food film. Chemistry ; Technologies ; Innovation for industry general public ; Journalists ; Researchers Iramis Scientific result Mon, 09 Nov 2020 11:00:00 GMT Investigation of a nano-architectured composite anode https://www.cea.fr/drf/english/Pages/News/Scientific-results/2020/investigation-of-a-nano-architectured-composite-anode.aspx In order to improve lithium-ion batteries, IRIG researchers are replacing the graphite of the negative electrode with silicon-based materials that can store much more lithium. These new nano-architected composite materials are made up of active domains of Si-amorphous and crystalline FeSi2 nanoparticles dispersed in a graphite matrix. They are studying the ageing phenomenon of these anodes capable of withstanding 700 cycles with a capacity of nearly 70%. Lithium-ion batteries general public ; Journalists ; Researchers IRIG Scientific result Mon, 02 Nov 2020 11:00:00 GMT See the technology of tomorrow’s OLED screens emerge https://www.cea.fr/drf/english/Pages/News/Scientific-results/2020/see-the-technology-of-tomorrows-oled-screens-emerge.aspx The CEA, working with ENS Paris-Saclay, and the universities of Rennes and San José (USA), has developed new light-emitting molecules with properties that improve the energy consumption and light production of organic light-emitting diodes (OLEDs). This is the first study correlating the structure and properties of this type of material, which has a promising future in display technologies Chemistry ; Photonics ; New technologies general public ; Journalists ; Researchers DRF Scientific result Thu, 22 Oct 2020 10:00:00 GMT Hydrogen isotopes in the race for new drugs https://www.cea.fr/drf/english/Pages/News/Scientific-results/2020/Hydrogen-isotopes-in-the-race-for-new-drugs.aspx Isotopic labeling remains essential for monitoring the in vivo fate of drug candidates. CEA-Joliot researchers have developed high-performance deuterium and tritium labelling techniques. Pharmacology ; Chemistry Companies ; general public ; Institutions ; Journalists ; Researchers Joliot Scientific result ; News Mon, 28 Sep 2020 10:00:00 GMT Nanovectors in radiotherapy: how to optimize the polymer crown of gold nanoparticles https://www.cea.fr/drf/english/Pages/News/Scientific-results/2020/nanovectors-in-radiotherapy-how-to-optimize-the-polymer-crown-of-gold-nanoparticles.aspx With the help of X-ray and neutron scattering measurements of model nanoparticles, a team from the Iramis is developing recommendations for the use of functionalized gold nanoparticles in anticancer therapy: the polymer crown must be made from hydrophobic, positively charged monomers. Micro-nanotechnologies ; Nanomedicine ; Diagnosis and innovative treatment ; Chemistry general public ; Journalists ; Researchers Iramis Scientific result Fri, 28 Aug 2020 10:00:00 GMT Anisotropic functionalization of gold nanoparticles assisted by surface plasmons https://www.cea.fr/drf/english/Pages/News/Scientific-results/2020/Anisotropic-functionalization-of-gold-nanoparticles-assisted-by-surface-plasmons.aspx Researchers at the CEA-Iramis and their partners have locally grafted organic molecules onto gold nanoparticles, using two photopolymerization steps. This new flexible functionalization technique can be used for applications ranging from biosensing to photonics. Photonics ; Micro-nanotechnologies ; Chemistry ; Laser ; Diagnosis ; Innovation for industry general public ; Journalists ; Researchers Iramis Scientific result Wed, 05 Aug 2020 10:00:00 GMT Methanol synthesis as part of the circular economy of carbon and silicon https://www.cea.fr/drf/english/Pages/News/Scientific-results/2020/Methanol-synthesis-as-part-of-the-circular-economy-of-carbon-and-silicon.aspx Chemists at Iramis have proposed a new pathway for the catalytic synthesis of methanol from a formic acid derivative – a waste product of the silicon industry – whose by-products can be recycled. This is a high-yield, sustainable and environmentally friendly process that can be used for energy storage and fine chemistry! Chemistry ; Recovery of CO2 ; Innovation for industry general public ; Journalists ; Researchers Iramis Scientific result Wed, 15 Jul 2020 10:00:00 GMT Highly controlled radical chemistry https://www.cea.fr/drf/english/Pages/News/Scientific-results/2020/Highly-controlled-radical-chemistry.aspx The CEA-Irig (IBS) has reported in Nature Catalysis a review on SAM proteins, a type of catalyst that produces highly reactive radical species. Chemistry ; Bio-inspired catalysis Companies ; Institutions ; Journalists ; Researchers IRIG Scientific result Wed, 03 Jun 2020 10:00:00 GMT Separation chemistry: a step toward greener metal recycling processes https://www.cea.fr/drf/english/Pages/News/Scientific-results/2020/Separation-chemistry-a-step-toward-greener-metal-recycling-processes.aspx Fundamental Research ; Environment ; Dismantling ; Chemistry ; Materials News ; Press release ; Focus Tue, 25 Feb 2020 11:00:00 GMT Supercapacitors: carbon nanotube “mats” on aluminum foil https://www.cea.fr/drf/english/Pages/News/Scientific-results/2020/supercapacitors-carbon-nanotube-mats-on-aluminum-foil.aspx A new electrode material for supercapacitors has been developed by the Iramis and its partners: composed of carbon nanotube “mats” aligned on aluminum foil, it should significantly increase the amount of stored electrical power. This is an essential result for their industrialization by the startup company NawaTechnologies. Energy storage ; Innovation for industry general public ; Journalists ; Researchers Scientific result Thu, 20 Feb 2020 11:00:00 GMT Detecting trace amounts of uranium in water https://www.cea.fr/drf/english/Pages/News/Scientific-results/2020/detecting-trace-amounts-of-uranium-in-water.aspx The Captot heavy metal sensor, developed by the Iramis-LSI over the last ten years, could be used to detect traces of uranium in water. This would be a simple, rapid field solution to monitor the environment, for example during the cleanup and dismantling of nuclear facilities. Chemistry ; Environment ; Remediation ; Radioactivity ; Materials ; Technologies ; Innovation for industry general public ; Journalists ; Researchers Iramis Scientific result ; Industrial partnerships Thu, 09 Jan 2020 11:00:00 GMT Irradiating electrodes for more powerful and long-lived Li-ion batteries https://www.cea.fr/drf/english/Pages/News/Scientific-results/2019/irradiating-electrodes-for-more-powerful-li-ion-batteries.aspx A large collaboration including the Iramis and two other CEA divisions (Basic Research Division and Nuclear Energy Division) has proposed to irradiate the graphite anodes of Li-ion batteries before their first use. This technique, similar to food or medicine processing, would lead to better results than the current industrial techniques for a potentially lower cost. Batteries ; Innovation for industry Journalists ; general public ; Researchers Iramis Scientific result Mon, 18 Feb 2019 11:00:00 GMT A “physicochemical” focus on promising therapeutic molecules https://www.cea.fr/drf/english/Pages/News/Scientific-results/2018/A-physicochemical-focus-on-promising-therapeutic-molecules.aspx Certain polyoxometallates are molecules that show promise for the treatment of cancer or Alzheimer’s disease. A team from the Institut de chimie séparative at Marcoule and the University of Regensburg has analyzed their remarkable behavior in aqueous environments with respect to polar surfaces and has found numerous applications in biology as well as materials science. Chemistry Researchers ; general public ; Journalists DSM Scientific result Fri, 23 Mar 2018 11:00:00 GMT C’mon electrons, let’s do the twist! https://www.cea.fr/drf/english/Pages/News/Scientific-results/2018/C’mon-electrons,-let’s-do-the-twist!.aspx Chemistry ; Physics ; Molecular mechanisms Press release ; Scientific result Tue, 20 Feb 2018 11:00:00 GMT BACCARA discovers the secret of capacity decay in Nano-silicon-based Lithium-ion Batteries https://www.cea.fr/drf/english/Pages/News/Institutional-news/2018/BACCARA-discovers-the-secret-of-capacity-decay--in-Nano-silicon-based-Lithium-ion-Batteries.aspx Scientists have performed a thorough analysis of promising silicon-based electrode technology with regard to Li-ion battery decay in the course of charge/discharge cycles. Oversaw by the CEA, this project was carried out through a balanced partnership between three academic and as many industry partners. Energies ; Energy efficiency ; Energy storage ; Batteries ; Lithium-ion batteries Journalists ; general public ; Researchers Grenoble News ; Newsletter ; CEA Research News ; European & international partnerships decay;H2020;batteries;Li-Ion;energy union and climate; Fri, 02 Feb 2018 17:00:00 GMT Formates work their way into silicon chemistry https://www.cea.fr/drf/english/Pages/News/Scientific-results/2018/Formates-work-their-way-into-silicon-chemistry.aspx Hydrosilanes are essential chemical compounds for the silicon chemical industry. A team from the Iramis has shown that they could be advantageously replaced by silyl formates, which are potentially regenerable at will from formic acid, a substance that can be synthesized by recycling CO2. Chemistry Researchers ; general public ; Journalists Iramis Scientific result Mon, 22 Jan 2018 11:00:00 GMT Biocompatible chemistry and the medicine of tomorrow https://www.cea.fr/drf/english/Pages/News/Scientific-results/2017/biocompatible-chemistry-and-the-medicine-of-tomorrow.aspx Two teams from the Institut Frédéric-Joliot and their partners have discovered a chemical reaction that allows the binding or breaking of molecules in biological environments. Chemistry ; Pharmacology ; Medical imaging Researchers ; general public ; Journalists Joliot Scientific result Thu, 21 Dec 2017 11:00:00 GMT Doping graphene nanosheets for on-chip supercapacitors https://www.cea.fr/drf/english/Pages/News/Scientific-results/2017/doping-graphene-nanosheets-for-on-chip-supercapacitors.aspx Three teams from the Inac have manufactured and characterized highly nitrogen-doped graphene nanosheets and tested them as supercapacitor electrodes. The performances obtained compare favorably with state of the art carbon electrodes. This promising technology has yet to be optimized for on-chip applications. Energy storage Researchers ; general public ; Journalists Inac Scientific result Wed, 13 Dec 2017 11:00:00 GMT An Antireflextion Layer to Observe Two-dimensional Nanomaterials https://www.cea.fr/drf/english/Pages/News/Scientific-results/2017/an-antireflextion-layer.aspx A team from IRAMIS has implemented a new optical microscopy technique to observe two-dimensional nanomaterials with unprecedented sensitivity and monitor their chemical functionalization in real time. Their work creates a particularly promising route for biodetection. Chemistry Researchers ; general public ; Journalists Iramis Scientific result chimie;nanocaractérisation;microscopie;biodétection;fonctionnalisation;nanomatériaux bidimensionnels; Mon, 04 Dec 2017 15:53:51 GMT Ionic Liquid: Weak or Strong Electrolyte? https://www.cea.fr/drf/english/Pages/News/Scientific-results/2017/ionic-liquid-weak-or-strong-electrolyte.aspx A collaboration involving IRAMIS has characterized the paradoxical properties of ionic liquids— electrolytes which appear as either strong or weak depending on the scale that they are probed—and inferred a path to improve their electrical conductivity. Confined in carbon nanotubes, the electrolyte under scrutiny is very stable at high temperature and could be put to good use in batteries or fuel cells. Energy storage Researchers ; general public ; Journalists Iramis Scientific result Sun, 15 Oct 2017 10:00:00 GMT From Vegetable Oils to Oleoactives® 2.0 https://www.cea.fr/drf/english/Pages/News/Scientific-results/2017/From-Vegetable-Oils-to-Oleoactives® 2.0.aspx Researchers from joint laboratory VECT'OLEO (Marcoule Institute for Separative Chemistry, Hallstar-France) have used an experimental model system and computer simulations to study the structuration of a vegetable oil and optimized it for the extraction and dispersing of bio-active molecules applied to cosmetics. Chemistry Researchers ; general public ; Journalists DRF Scientific result Wed, 11 Oct 2017 10:00:00 GMT Into the Drama of an Ion Pair https://www.cea.fr/drf/english/Pages/News/Scientific-results/2017/into-the-drama-of-an-ion-pair.aspx For the first time, IRAMIS researchers have isolated complex ion pairs in the gas phase and were able to characterize them using UV and infrared spectroscopy. This original experimental approach will deepen the scientists' understanding of extremely diverse physicochemical processes in media as varied as biological cells and batteries. Chemistry Researchers ; general public ; Journalists Iramis Scientific result cellule;paire ionique;spectroscopie;Complexe;batterie; Wed, 30 Aug 2017 10:00:00 GMT Higher Efficiency Achieved in Li-ion Batteries Thanks to Metal Oxide Nanoparticles https://www.cea.fr/drf/english/Pages/News/Scientific-results/2017/higher-efficienc-achieved-in-li--on-batteries-thanks-to-metal-oxide-nanoparticles.aspx A collaboration led by IRAMIS has demonstrated that the graphite in Li-ion batteries electrodes can be advantageously replaced by a material made of nitrogen-doped tin oxide nanoparticles. Energy storage Researchers ; general public ; Journalists Iramis Scientific result nanoparticules;nanotechologie;dopage;pyrolyse laser;SnO2;batterie Lithium-ion; Wed, 12 Jul 2017 10:00:00 GMT A Supramolecular Big Bang https://www.cea.fr/drf/english/Pages/News/Scientific-results/2017/a-supramolecular-big-bang.aspx Chemists from ICSM have provided evidence of an atypical transition in a system of surfactant molecules in an aqueous solution: “large” hollow spheres (vesicles) evolve toward “small” solid spheres (micelles) as concentration increases. A sort of “Big Bang” due to electrostatic repulsion between vesicles leads to their explosion into micelles. This could offer new opportunities for drug encapsulation and vectorization. Chemistry Researchers ; general public ; Journalists DRF Scientific result micelles;molécules tensioactives;vectorisation de médicaments;Vésicules; Sun, 21 May 2017 07:00:00 GMT Toward a Better Understanding of Ionic Conductivity in the Electrolyte https://www.cea.fr/drf/english/Pages/News/Scientific-results/2017/toward-a-better-understanding-of-ionic-conductivity-in-the-electrolyte.aspx An international collaboration led by institutes INAC and LITEN shows that lithium ions interact with the electrolyte in very different ways depending on the anion content. This is an essential finding for improving the performance of lithium-ion batteries. Energies ; Chemistry general public ; Journalists ; Researchers Inac Scientific result Thu, 09 Feb 2017 11:00:00 GMT Performing chemistry within the cell https://www.cea.fr/drf/english/Pages/News/Scientific-results/2014/Performing-chemistry-within-the-cell.aspx Researchers from the CEA-IBITECS in collaboration with a team from the University of Strasbourg (UDS) have developed new reagents known as “chelating azides”, which can rapidly and selectively couple to any compound equipped with an alkyne group. The reaction can take place in any environment, including within a cell. Chemistry ; Methodologies for life sciences Saclay Scientific result Tue, 06 May 2014 10:00:00 GMT Quantum dot: a promising new imaging agent https://www.cea.fr/drf/english/Pages/News/Scientific-results/2013/Quantum-dot-a-promising-new-imaging-agent.aspx The drawback to current optical imaging markers is their short life. Researchers are now developing fluorescent nanocrystals (quantum dots) to supplant these markers. A team from the CEA-iBiTec-S, in collaboration with the CEA-I2BM and ESPCI, has developed a new surface chemistry for these particularly effective nanoparticles. Cell and molecular imaging ; Nanomedicine ; Chemistry Fontenay-aux-Roses Scientific result Fri, 22 Mar 2013 11:00:00 GMT