Water sub-diffusion in membranes for fuel cells. (arXiv:1701.00666v2 [cond-mat.mtrl-sci] UPDATED)

We investigate the dynamics of water confined in soft ionic nano-assemblies, an issue critical for a general understanding of the multi-scale structure-function interplay in advanced materials. We focus in particular on hydrated perfluoro-sulfonic acid compounds employed as electrolytes in fuel cells. These materials…

The Interacting Mesoscopic Capacitor Out of Equilibrium. (arXiv:1612.04822v2 [cond-mat.mes-hall] UPDATED)

We consider the full nonequilibrium response of a mesoscopic capacitor in the large transparency limit, exactly solving a model with electron-electron interactions appropriate for a cavity in the quantum Hall regime. For a cavity coupled to the electron reservoir via an ideal point…

Electrocatalytic hydrogen evolution reaction activity comparable to platinum exhibited by the Ni/Ni(OH)2/graphite electrode [Chemistry]

Electrochemical dual-pulse plating with sequential galvanostatic and potentiostatic pulses has been used to fabricate an electrocatalytically active Ni/Ni(OH)2/graphite electrode. This electrode design strategy to generate the Ni/Ni(OH)2 interface on graphite from Ni deposits is promising for electrochemical applications and has been used by…

Synthesis of Uniquely Structured Yolk–Shell Metal Oxide Microspheres Filled with Nitrogen-Doped Graphitic Carbon with Excellent Li–Ion Storage Performance

Novel structured composite microspheres of metal oxide and nitrogen-doped graphitic carbon (NGC) have been developed as efficient anode materials for lithium-ion batteries. A new strategy is first applied to a one-pot preparation of composite (FeOx-NGC/Y) microspheres via spray pyrolysis. The FeOx-NGC/Y composite microspheres…

Current Progress on Rechargeable Magnesium–Air Battery

Rechargeable Mg–air batteries are a promising alternative to Li–air cells owing to the safety, low price originating from the abundant resource on the earth, and high theoretical volumetric density (3832 A h L−1 for Mg anode vs 2062 A h L−1 for Li).…

Macroscopic-Scale Three-Dimensional Carbon Nanofiber Architectures for Electrochemical Energy Storage Devices

The development of high-performance electrochemical energy storage devices is critical for addressing energy crises and environmental pollution. Hence, the design and preparation of next-generation electrode materials have been gaining increasing attention. Recent progress has demonstrated that three-dimensional (3D) carbon nanomaterials are extremely promising…

New approach makes lightest automotive metal more economic, useful

Magnesium—the lightest of all structural metals—has a lot going for it in the quest to make ever lighter cars and trucks that go farther on a tank of fuel or battery charge. Published in: Published in: Phys.org

Android 8.0 Oreo unveiled by Google, with picture-in-picture mode and other new features

The software has been labelled “smarter, faster and more powerful than ever” by Google and will be available as a free update to users of Android smartphones, including handsets by Samsung, HTC and Huawei. In addition to picture-in-picture mode – which will allow…

Interacting mesoscopic capacitor out of equilibrium

Author(s): Daniel Litinski, Piet W. Brouwer, and Michele FilipponeWe consider the full nonequilibrium response of a mesoscopic capacitor in the large transparency limit, exactly solving a model with electron-electron interactions appropriate for a cavity in the quantum Hall regime. For a cavity coupled…

Fabrication of an arbitrary-shaped and nitrogen-doped graphene aerogel for highly compressible all solid-state supercapacitors

J. Mater. Chem. A, 2017, Advance ArticleDOI: 10.1039/C7TA04917J, PaperDegang Jiang, Chenwei Li, Wenrong Yang, Jizhen Zhang, Jingquan LiuHerein, we report a new template method for fabricating an arbitrary-shaped compressible nitrogen-doped graphene aerogel (GA).To cite this article before page numbers are assigned, use the…