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US 12,261,287 B2Granted
Conformal graphene cage encapsulated battery electrode materials and methods of forming thereof
AssigneeThe Board of Trustees of the Leland Stanford Junior University
InventorsYuzhang Li, Kai Yan, Zhenda Lu, Yi Cui
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Abstract
A conformal graphene-encapsulated battery electrode material is formed by: (1) coating a battery electrode material with a metal catalyst to form a metal catalyst-coated battery electrode material; (2) growing graphene on the metal catalyst-coated battery electrode material to form a graphene cage encapsulating the metal catalyst-coated battery electrode material; and (3) at least partially removing the metal catalyst to form a void inside the graphene cage.
Claims8
A conformal graphene-encapsulated material comprising:
- a graphene cage defining an enclosed internal volume;
- and
- a battery electrode active material disposed within the enclosed internal volume,
- wherein the battery electrode active material occupies less than 100% of the enclosed internal volume to define a void, and a wall of the graphene cage has a thickness in a range of 0.5 nm to 100 nm, wherein the void is formed by etching a metal catalyst formed between the graphene cage and the battery electrode active material, and
- wherein a surface atomic concentration ratio of an element included in the battery electrode active material relative to carbon is about 1/10 to about 1/50.
2 more elements
Dependencies are inferred from the claim text.