Curved two-dimensional nanocomposites for battery electrodes
AssigneeGeorgia Tech Research Corporation
InventorsGleb Yushin, Kara Evanoff, Oleksandr Magazynskyy
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Abstract
A battery electrode composition is provided that comprises a composite material comprising one or more nanocomposites. The nanocomposites may each comprise a planar substrate backbone having a curved geometrical structure, and an active material forming a continuous or substantially continuous film at least partially encasing the substrate backbone. To form an electrode from the electrode composition, a plurality of electrically-interconnected nanocomposites of this type may be aggregated into one or more three-dimensional agglomerations, such as substantially spherical or ellipsoidal granules.
Claims44
A three-dimensional (3D) porous silicon (Si)-comprising and carbon (C)-comprising nanocomposite particle, comprising:
- interconnected curved and defect-comprising graphene;
- Si or Si-comprising active material in direct contact with the interconnected curved and defect-comprising graphene;
- at least one more material distinct from the interconnected curved and defect-comprising graphene and the Si or Si-comprising active material;
- and
- internal pores that at least partially accommodate volume changes in the Si or Si-comprising active material during insertion and extraction of lithium ions, at least some of the internal pores formed by the interconnected curved and defect-comprising graphene,
- wherein:
- the internal pores comprise one or more micropores;
- and
- the interconnected curved and defect-comprising graphene is characterized by a radius of curvature in a range of about 0.3 nm to about 0.03 mm.
Dependencies are inferred from the claim text.