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US 8,557,442 B2Granted
Nanocomposite of graphene and metal oxide materials
AssigneesBattelle Memorial Institute, The Trustees of Princeton University
InventorsJun Liu, Ilhan A. Aksay, Daiwon Choi, Donghai Wang, Zhenguo Yang
Life of this patent
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Abstract
Nanocomposite materials comprising a metal oxide bonded to at least one graphene material. The nanocomposite materials exhibit a specific capacity of at least twice that of the metal oxide material without the graphene at a charge/discharge rate greater than about 10 C.
Claims11
A method comprising:
- providing graphene layers in a first mixture, the graphene layers having a first surface and a second surface and thicknesses of 0.5 to 50 nm;
- dispersing the graphene layers with a surfactant;
- adding a metal oxide precursor to said dispersed graphene layers to form a second mixture;
- and
- precipitating the metal oxide from the second mixture on surfaces of the dispersed graphene layers to form a nanocomposite material comprising a metal oxide bonded directly to the first and second surfaces of a graphene layer with the metal oxide substantially uniformly distributed throughout the nanocomposite material.
2 more elements
A method comprising:
- providing graphene layers in a first mixture, the graphene layers having a first surface and a second surface, and consisting essentially of 1 to 147 functionalized graphene sheets;
- dispersing the graphene layers with an anionic surfactant;
- adding a metal oxide precursor to said dispersed graphene layers to form a second mixture;
- and
- condensing the metal oxide from the second mixture on surfaces of the dispersed graphene layers and removing the surfactant to form a nanocomposite material comprising a metal oxide bonded directly to the first and second surfaces of the graphene layers with the metal oxide substantially uniformly distributed throughout the nanocomposite material.
2 more elements
Dependencies are inferred from the claim text.