Preparation method of 3D printing flexible solid-state lithium ion capacitor

The invention belongs to the technical field of lithium ion capacitor preparation, and particularly relates to a preparation method of a 3D printing flexible solid-state lithium ion capacitor. Comprising the following steps: preparing graphene oxide/carbon nanotube/lithium cobalt oxide nano-micro multilevel structure conductive ink, quaternary ammonium ion plastic crystal-ionic liquid polymer solid electrolyte and hard carbon/superfine gold nanowire/graphene oxide conductive ink, and then printing the conductive ink into an electrode by utilizing a 3D printing technology. The preparation method comprises the following steps: preparing a graphene oxide electrode, soaking the electrode in a reducing agent to reduce the graphene oxide so as to prepare a positive electrode and a negative electrode, sequentially printing a solid electrolyte on the positive electrode and the negative electrode by using a 3D printing technology, assembling, and carrying out vacuum drying so as to obtain the flexible solid-state lith