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graphene

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  • Slippery when dry

    Anyone who has ever taken their car in for an oil change recognizes the importance of reducing the friction that arises when steel touches steel.
    graphene-encapsulated diamond ball bearings

  • Hyeondeok Shin

    Physicist & computational scientist with expertise in chemistry, condensed matter physics, & computational physics. He specializes in methods & applications of Density Functional Theory, Quantum Chemistry, & Quantum Monte Carlo for functional materials.
  • Production process for low-cost, long-life, high-energy anodes with five times the specific energy
    Intellectual Property Available to License
    US Patent 9,593,413 B2
    • Silicon-Graphene Anodes (ANL-IN-11-034)
    Junbing Yang, inventor of the Si-Graphene composite anodes, working on the composite materials synthesis.

    The Invention 

    An advanced gas phase deposition method to make silicon/carbon composite anodes that offer five times the specific energy of those currently used in lithium-ion batteries. The process embeds nanoscale silicon particles into the graphene layers, a key to longer cycle life and improved capacity. 

    This approach overcomes the traditional problems associated with high energy density anodes, such as massive volume expansion, high first cycle inefficiency and severe capacity fade. 

    Benefits 

    • Anodes made with this process have five times the specific energy of those made with carbon. 
    • When these new anodes are combined with high-energy composite cathodes, resulting batteries have more than double the energy density. 
    • The new process allows seamless integration with polycrystalline silicon manufacturing. 
    • The process allows low-cost silicon/carbon composite production. 

    Applications and Industries 

    • Electrodes used in batteries for 
    • Electric and plug-in hybrid electric vehicles; 
    • Portable electronic devices; 
    • Medical devices; and 
    • Space, aeronautical, and defense-related devices. 

    Developmental Stage 

    Proof of Concept