Ultra-high specific energy cathode materials for lithium-ion batteries and methods for producing the same
AssigneeThe Trustees of Indiana University
InventorJian Xie
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Abstract
Cathode active materials for lithium-ion batteries comprise a hybrid nanocomposite of graphene and copper fluoride. Such cathode active materials are used, together with a polymeric binder material and optionally a conductive additive to form a cathode for a lithium-ion battery. Methods of producing hybrid nanocomposites of graphene and copper fluoride include hydrothermally reacting functionalized graphene, such as graphene oxide, and precursors of copper fluoride, such as aqueous fluorosilicic acid. Such hydrothermal reactions include sequential heating and freeze drying steps to produce a CuF2-graphene nanocomposite.
Claims13
A method of producing a cathode active material, the method comprising:
- mixing a first quantity of CuSiF6·6H2O with a second quantity of graphene oxide in an aqueous graphene oxide solution to provide an aqueous mixture;
- heating the aqueous mixture to produce a CuSiF6/graphene oxide material;
- freeze drying the CuSiF6/graphene oxide material;
- and
- after said freeze drying, heating the CuSiF6/graphene oxide material under air flow to produce a cathode active material comprising a CuF2-graphene nanocomposite.
Dependencies are inferred from the claim text.