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    Category Chemistry/Nanotechnology

    Graphene-Nanotube Hybrid boosts Lithium Metal Batteries

    May 20, 2017, Categories  Technology/Electronics, Chemistry/Nanotechnology

    1. Lithium metal coats the hybrid graphene and carbon nanotube anode in a battery created at Rice University. The lithium metal coats the three-dimensional structure of the anode and avoids forming dendrites. Courtesy of the Tour Group. 2. A graphic shows carbon nanotubes covalently bonded to a graphene substrate. The material created at Rice University is being tested as an anode for high-capacity lithium metal batteries. Courtesy of the Tour Group - See more at: http://news.rice.edu/2017/05/18/graphene-nanotube-hybrid-boosts-lithium-metal-batteries-2/#sthash.eX5HvXSE.dpuf 3. An electron microscope image shows a carbon nanotube evenly coated with lithium metal. Tests on the graphene-carbon nanotube anode created at Rice University show it resists the formation of lithium dendrites that can damage batteries. Courtesy of the Tour Group

    1. Lithium metal coats the hybrid graphene and carbon nanotube anode in a battery created at Rice University. The lithium metal coats the three-dimensional structure of the anode and avoids forming dendrites. Courtesy of the Tour Group.
    2. A graphic shows carbon nanotubes covalently bonded to a graphene substrate. The material created at Rice University is being tested as an anode for high-capacity lithium metal batteries. Courtesy of the Tour Group – See more at: http://news.rice.edu/2017/05/18/graphene-nanotube-hybrid-boosts-lithium-metal-batteries-2/#sthash.eX5HvXSE.dpuf
    3. An electron microscope image shows a carbon nanotube evenly coated with lithium metal...

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    New Water-based, Recyclable Membrane Filters all types of Nanoparticles

    May 19, 2017, Categories  Physics, Technology/Electronics, Chemistry/Nanotechnology

    A self-assembling membrane for water purification. Credit: Image courtesy of Weizmann Institute of Science

    A self-assembling membrane for water purification. Credit: Image courtesy of Weizmann Institute of Science

    Separation technology is at the heart of water purification, sewage treatment, and materials reclamation, as well as numerous basic industrial processes. Membranes are used to separate out the smallest nanoscale particles, and even molecules and metal ions. Prof. Boris Rybtchinski and his group of the Weizmann Institute of Science’s Department of Organic Chemistry have developed a new type of membrane that could extend the life of a separation system, lower its cost and, in some cases, increase its efficiency as well.

    The membranes Prof...

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    Photocatalyst makes Hydrogen Production 10 times more Efficient

    May 19, 2017, Categories  Physics, Technology/Electronics, Chemistry/Nanotechnology

    SrTiO3 mesocrystal light emission. Credit: Image courtesy of Kobe University

    SrTiO3 mesocrystal light emission. Credit: Image courtesy of Kobe University

    Hydrogen is an alternative source of energy that can be produced from renewable sources of sunlight and water. A group of Japanese researchers has developed a photocatalyst that increases hydrogen production tenfold. The discovery was made by a joint research team led by Associate Professor TACHIKAWA Takashi (Molecular Photoscience Research Center, Kobe University) and Professor MAJIMA Tetsuro (Institute of Scientific and Industrial Research, Osaka University). Their findings were published on April 6 in the online version of Angewandte Chemie International Edition.

    When light is applied to photocatalysts, electrons and holes are produced on the surface of the catalyst, and hydrogen is obtained when these electro...

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    Development of Ultra-High Capacity Lithium-Air Batteries using CNT sheet Air Electrodes

    May 18, 2017, Categories  Physics, Technology/Electronics, Chemistry/Nanotechnology

    Akihiro Nomura, Kimihiko Ito, Yoshimi Kubo. CNT Sheet Air Electrode for the Development of Ultra-High Cell Capacity in Lithium-Air Batteries. Scientific Reports, 2017; 7: 45596 DOI: 10.1038/srep45596

    Akihiro Nomura, Kimihiko Ito, Yoshimi Kubo. CNT Sheet Air Electrode for the Development of Ultra-High Cell Capacity in Lithium-Air Batteries. Scientific Reports, 2017; 7: 45596 DOI: 10.1038/srep45596

    A NIMS team led by Yoshimi Kubo and Akihiro Nomura, team leader and researcher, respectively, Lithium Air Battery Specially Promoted Research Team, C4GR-GREEN, developed lithium-air batteries with very high electric storage capacity 15X greater than the capacity of conventional lithium-ion batteries using carbon nanotubes (CNT) as an air electrode material. Demand for rechargeable batteries is expected to increase rapidly as electric vehicle power sources and joint sources of household electricity with solar cells.

    The current lithium-ion batteries have advantages of being compact, producing h...

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