| 摘要 |
A graphene-based battery includes an anode, a cathode and an electrolyte. The electrodes of anode and cathode include vertically free-standing graphene, carbon nanosheets, and/or three- dimensional (3D) carbon nanostructures in various configurations. For example, the carbon nanosheets are disposed orthogonally to a surface, and include a single layer or multiple layers of graphene. The vertically free-standing carbon nanosheets are coated with an active material as the cathode. A liquid, gel or solid-state electrolyte is either pseudo-morphologically coated on the surface of free-standing carbon nanosheets, or fully impregnates the space between the free¬ standing carbon nanosheets. Essentially, the vertically free-standing carbon nanosheets function as space-organizers at nanoscale. By partitioning the space between the anode and the cathode, the vertically free-standing carbon nanosheets can greatly enlarge the surface area of the loaded active material, and provide utterly high electrical conductivity, by virtue of physical properties of graphene. |
