| 摘要 |
A composite composition for electrochemical cell electrode applications, the composition comprising multiple solid particles, wherein (a) a solid particle is composed of graphene platelets dispersed in or bonded by a first matrix or binder material, wherein the graphene platelets are not obtained from graphitization of the first binder or matrix material; (b) the graphene platelets have a length or width in the range of 10 nm to 10 μm; (c) the multiple solid particles are bonded by a second binder material; and (d) the first or second binder material is selected from a polymer, polymeric carbon, amorphous carbon, metal, glass, ceramic, oxide, organic material, or a combination thereof. For a lithium ion battery anode application, the first binder or matrix material is preferably amorphous carbon or polymeric carbon. Such a composite composition provides a high anode capacity and good cycling response. For a supercapacitor electrode application, the solid particles preferably have meso-scale pores therein to accommodate electrolyte. |
| 主权项 |
1. A solid nanocomposite particle for electrochemical cell electrode applications, said nanocomposite particle consisting of individual nano-scaled exfoliated graphene platelets having a thickness less than 100 nm bonded by a first binder material, wherein said exfoliated graphene platelets occupy a weight fraction of 2% to 98% of the total nanocomposite particle weight and said graphene platelets are not obtained from direct graphitization of said first binder material, wherein said solid nanocomposite particle has a substantially spherical or ellipsoidal shape, wherein said exfoliated graphene platelets are obtained from exfoliation and platelet separation of a member of the group consisting of a natural graphite, synthetic graphite, highly oriented pyrolytic graphite, graphite fiber, carbon fiber, carbon nano-fiber, graphitic nano-fiber, spherical graphite or graphite globule, meso-phase micro-bead, meso-phase pitch, graphitic coke, and graphitized polymeric carbon; and wherein said first binder material is selected from a polymer, polymeric carbon, coke, petroleum pitch, coal tar pitch, meso-phase pitch, metal, glass, ceramic, oxide, organic material, or a combination thereof and further wherein said solid particle comprises therein microscopic or meso-scaled pores. |
