SECONDARY BATTERY

A secondary battery includes a body including a solid electrolyte layer, and a positive electrode and a negative electrode disposed with the solid electrolyte layer interposed therebetween; and first and second external electrodes respectively disposed on one surface and the other surface of the body, opposite to the one surface, and respectively connected to the positive electrode and the negative electrode, wherein the positive electrode comprises a positive electrode active material layer and a first electrolytic mixing portion disposed at an interface of the positive electrode in contact with the solid electrolyte layer. The first electrolytic mixing portion is a mixture of a positive electrode active material and a liquid phase and/or gel phase electrolyte. 本发明提供一种二次电池，所述二次电池包括：主体，包括固体电解质层以及设置为使所述固体电解质层介于其间的正极和负极；以及第一外电极和第二外电极，分别设置在所述主体的一个表面和与所述一个表面相对的另一表面上，并且分别连接到所述正极和所述负极，其中，所述正极包括正极活性材料层和设置在所述正极的与所述固体电解质层接触的界面处的第一电解质混合部。所述第一电解质混合部为正极活性材料与液相和/或凝胶相电解质的混合物。