Three-Dimensional Bi-Continuous Graphene Monolith from Hollow Ni Templates Via Polymer Templates

The stack of graphene sheets greatly reduces its exceptionally high specific surface area, which limits the potential utilization of graphene.  Here in this work, we report a method to fabricate three-dimensional, bi-continuous graphene monolith through a controllable hollow Ni templates derived from polymer blends. The poly(styrene)/poly (ethylene oxide) were used to fabricate a bi-continuous gyroid template with controllable phase separation. The nickel template was formed by electroless depositing metal on the polymer and the resulting hollow nickel structure exhibited very high porosity of 95.15%. Graphene was synthesized from this hollow nickel template by chemical vapor deposition and the free-standing bi-continuous graphene monolith was obtained in high throughput. The bi-continuous graphene monolith was used in the energy storage devices and exhibited promising results.