SOLID BATTERY AND PREPARATION METHOD OF SOLID BATTERY

A solid battery, and a method of preparing an solid battery. The solid battery includes: a cathode; an anode; and a solid electrolyte layer between the cathode and the anode. The solid electrolyte layer comprises one or a plurality of sub-solid electrolyte layers. The solid electrolyte layer comprises an interlayer between the plurality of sub-solid electrolyte layers or does not comprise the interlayer. At least one of the sub-solid electrolyte layer or the interlayer, if present, comprises a tackifier. The tackifier comprises a hydrocarbonaceous oligomer derived from an aliphatic chain monomer having 5 carbon atoms to 20 carbon atoms, an aromatic ring monomer having 6 carbon atoms to 20 carbon atoms, an aliphatic ring monomer having 5 carbon atoms to 20 carbon atoms, or a combination thereof.