▎ 摘　　要

NOVELTY - Diaphragm comprises a diaphragm main body (3) whose surface is coated with a piezoelectric ceramic layer. One surface of the diaphragm main body is coated with the piezoelectric ceramic layer that is arranged towards a cathode (2) of a lithium metal battery. The piezoelectric ceramic layer is provided with a conductive agent (31), a bonding agent and piezoelectric ceramic particles (32). The conductive agent is taken from a group consisting of a conductive agent, a bonding agent. USE - Diaphragm is useful for lithium-metal battery. ADVANTAGE - The diaphragm is capable of reducing side reaction, slowing the lithium battery performance attenuation, and uniformly depositing lithium does not pierce the diaphragm short circuit and improving the safety of the battery. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for preparation method of diaphragm for lithium metal battery. DESCRIPTION OF DRAWING(S) - The drawing shows a schematic representation of the diaphragm for lithium-metal battery. Cathode (2) Diaphragm main body (3) Conductive agent (31) Piezoelectric ceramic particles (32)