▎ 摘　　要

NOVELTY - A graphene preparation device comprises weak acid electrolyte, power supply (6), container (7), expandable graphite cake (8), conductive metal net (9), and metal plate (10). The bottom end plate of container is provided with metal plate. The container is filled with electrolyte. The expandable graphite cake is installed on a hanger. The conductive metal net is welded on outer surface of expansion graphite cake. The power supply is respectively connected through lead and conductive metal net and metal plate. USE - Graphene preparation device. ADVANTAGE - The device has low cost, simple operation, and prepares high purity graphene. DESCRIPTION OF DRAWING(S) - The drawing is a schematic diagram illustrating a graphene preparation device. Power supply (6) Container (7) Expandable graphite cake (8) Conductive metal net (9) Metal plate (10)