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  • [August 28, 2017]

    High performance rechargeable batteries to power a sustainable future

  • Speaker:
    Guoxiu Wang
    Date:
    Monday, August 28, 2017
    Time:
    2:30-3:30pm
    Location:
    Room 210, COE Building No.1
    Host:
    Yanglong Hou
  • Abstract
  • In this talk, I will report the development of advanced lithium-ion batteries, lithium-air batteries and sodium-ion batteries, based on materials architecture design.

    Graphene nanosheets, tin-graphene and silicon-graphene nanocomposites have been prepared by various techniques. When applied as anode materials in lithium-ion batteries, they demonstrated enhanced electrochemical performances.

    Lithium-air battery is one of the most promising systems for meeting today’s stringent requirements as the power source for electric vehicles. The theoretical specific energy of the Li-O2 battery is 3,505 Wh kg 1, which is almost ten times higher than that of Li-ion batteries (387 Wh kg-1).  Porous graphene with different pore size architectures were synthesized as cathode catalysts for lithium-air batteries. Porous graphene exhibited significantly higher discharge capacities than that of non-porous graphene. The Ru nanocrystal decorated porous graphene exhibited an excellent catalytic activity with a high reversible capacity, low charge/discharge over-potential, and long cycle life. Furthermore, sodium-ion batteries were also investigated.

    Sodium-ion batteries and potassium-ion batteries are being considered as a promising system for stationary energy storage and conversion, owing to natural abundance of sodium and potassium. Several electrode materials were synthesized as either cathode materials or anode materials for sodium-ion batteries and potassium-ion batteries.

  • Biography
  • Professor Guoxiu Wang is the Director of the Centre for Clean Energy Technology and a Distinguished Professor at University of Technology Sydney (UTS), Australia. Professor Wang is an expert in materials chemistry, electrochemistry, energy storage and conversion, and battery technologies. His research interests include lithium-ion batteries, lithium-air batteries, sodium-ion batteries, lithium-sulfur batteries, supercapacitors, hydrogen storage materials, fuel-cells, graphene, and chemical functionalisation of graphene. Professor Wang has published more than 390 refereed journal papers with an h-index of 67. His publications have attracted over 17,000 citations (Web of Science).