Synthesis of three-dimensional graphene foam: use as supercapacitors
First Claim
Patent Images
1. A three-dimensional crystalline graphene foam, comprising a core that includes a group IV-B element and a graphene layer surrounding the core, wherein the three-dimensional crystalline graphene foam is produced by the steps of:
- a) mixing a carbon source coated on a group IV-B element and a skelet powder together to obtain a uniform mixture, the skelet powder having a particle size of 1 nm to 10 μ
m;
b) applying pressure to the uniform mixture obtained in step (a) to obtain a closed packed structure;
c) applying temperature and pressure to the closed packed structure to form a graphene sheet layered around the skelet powder and the group IV-B element; and
d) removing the skelet powder from the closed packed structure using a chemical bath to dissolve the skelet powder away from the closed packed structure leaving voids,thereby forming the three-dimensional crystalline graphene foam.
0 Assignments
0 Petitions
Accused Products
Abstract
The invention relates to three-dimensional crystalline foams with high surface areas, high lithium capacity, and high conductivity for use as electrode materials and methods for their fabrication. In additional embodiments, the invention also relates to the use of three-dimensional crystalline foams as supercapacitors for improved charge and energy storage.
-
Citations
21 Claims
-
1. A three-dimensional crystalline graphene foam, comprising a core that includes a group IV-B element and a graphene layer surrounding the core, wherein the three-dimensional crystalline graphene foam is produced by the steps of:
-
a) mixing a carbon source coated on a group IV-B element and a skelet powder together to obtain a uniform mixture, the skelet powder having a particle size of 1 nm to 10 μ
m;b) applying pressure to the uniform mixture obtained in step (a) to obtain a closed packed structure; c) applying temperature and pressure to the closed packed structure to form a graphene sheet layered around the skelet powder and the group IV-B element; and d) removing the skelet powder from the closed packed structure using a chemical bath to dissolve the skelet powder away from the closed packed structure leaving voids, thereby forming the three-dimensional crystalline graphene foam. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18)
-
- 19. A three-dimensional crystalline graphene foam, comprising a core that includes a group IV-B element and 1 to 20 layers of graphene surrounding the core, wherein the 1 to 20 layers of graphene are arranged as an intercalated network of continuously connected graphene sheets forming a porous network.
Specification