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US 9,190,667 B2Granted
Graphene nanocomposites for electrochemical cell electrodes
AssigneeNanotek Instruments, Inc.
InventorsAruna Zhamu, Bor Z. Jang, Jinjun Shi
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AssigneeNanotek Instruments, Inc.
InventorsAruna Zhamu, Bor Z. Jang, Jinjun Shi
Estimating the term…
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.
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;
A solid nanocomposite particle for electrochemical cell electrode applications, said nanocomposite particle consisting of individual nano-scaled exfoliated graphene platelets bonded by a first binder material, wherein said 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, and wherein said first binder material is selected from the group consisting of a polymer, polymeric carbon, amorphous carbon, coke, petroleum pitch, coal tar pitch, meso-phase pitch, metal, glass, ceramic, oxide, organic material, and combinations thereof and wherein said solid particle has a substantially spherical or ellipsoidal shape and further wherein said solid particle comprises therein microscopic or meso-scaled pores.
A solid nanocomposite particle for electrochemical cell electrode applications, said nanocomposite particle consisting of individual nano-scaled exfoliated graphene platelets bonded by a first binder material, wherein said 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, and wherein said first binder material is selected from the group consisting of a polymer, polymeric carbon, amorphous carbon, coke, petroleum pitch, coal tar pitch, meso-phase pitch, metal, glass, ceramic, oxide, organic material, and combinations thereof and further wherein said solid particle comprises therein microscopic or meso-scaled pores, 1 nm to 10 nm in size.
An electrochemical cell electrode comprising solid nanocomposite particles, wherein
Dependencies are inferred from the claim text.