Back to results
US 2019/0157666 A1Published application
Crumpled graphene-encapsulated nanostructures and lithium ion battery anodes made therefrom
AssigneesNorthwestern University, Korea Institute of Geoscience and Mineral Resource
InventorsJiaxing Huang, Hee Dong Jang, Jiayan Luo
Life of this patent
Estimating the term…
Abstract
Capsules comprising crumpled graphene sheets that form a crumpled graphene shell encapsulating an internal cargo comprising nanostructures of a second component are provided. Also provided are anode materials for lithium ion batteries comprising the capsules, wherein the nanostructures are composed of an electrochemically active material, such as silicon.
Claims21
1-12. (canceled)
An electrode material comprising capsules, each capsule comprising:
- a shell comprising one or more crumpled sheets of graphene, graphene oxide, reduced graphene oxide, or a combination thereof;
- and
- an electrochemically active material encapsulated within the shell,
- wherein the electrochemically active material comprises at least 50 wt % of the capsule.
1 more element
A method of making capsules, the method comprising:
- forming a dispersion of sheets of graphene, graphene oxide, reduced graphene oxide, or a combination thereof, and an electrochemically active material;
- atomizing the dispersion to form aerosol droplets;
- transferring the aerosol droplets by way of a carrier gas from the atomizer to a preheated furnace;
- and
- heating the aerosol droplets as the droplets pass through the preheated furnace, such that evaporation-induced capillary forces wrap the sheets around the electrochemically active material and encapsulate the electrochemically active material to form capsules.
2 more elements
Dependencies are inferred from the claim text.