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Technology Commercialization and Partnerships Division

Layered Electrodes for Lithium Cells and Batteries (ANL-IN-02-010)

Layered lithium metal oxide compounds for ultra-high capacity, rechargeable cathodes

The Invention 

High-capacity, rechargeable cathodes made of stable di-lithium layered compounds (Li2MO2) (M=Li, Ni, Mn) for use in Li batteries. The electrode capacities exceed 500 mAhg-1 when two lithium cations are cycled, giving this material very high energy. Li2MO2 is a good chemical precursor to fabricate cathodes with new composite layered LiMO2 or LiM2O4 spinel structures that possess excellent cycling reversibility. Li2MO2 can also be used as a reversible anode when cycled below 1.5 V.

Structure of Li2MO2 layered compound showing their use as a precursor for fabrication of reversible LiMO2 cathode materials

Benefits 

  • Li2MO2, as a layered precursor chemical, can be used to create LiMO2 composite cathodes with high-capacity and high energy which are superior to state-of-the-art layered lithium/cobalt/nickel/oxide cathodes. 
  • Layered Li2MO2 cathodes possess capacities of 500 mAhg-1 which are much higher than current Li-ion batteries. Because of this, the voltage of the electrochemical reactions can be raised to produce batteries with high energy densities. 
  • Manganese, nickel and lithium are used in the compounds, avoiding the use of cobalt, which is expensive and toxic. 
  • Low-cost synthesis of Li2MO2 by chemical or electrochemical lithiation is a new approach to make cathodes that last longer with low energy losses. 

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.