▎ 摘　　要

NOVELTY - A solid-state electrochemical cell (20) comprises a solid electrolyte (26) forming a major surface (S1), a negative electrode (22) forming a major surface (S2), and an interface layer (28) arranged between major surfaces (S1) and (S2). The interface layer comprises an ionic conductor arranged in an organic matrix. Lithium ions move cyclically in the solid-state electrochemical cell. USE - Solid-state electrochemical cell is used as all-solid-state lithium-ion battery. Uses include but are not limited to stop-start system, battery-assisted system, hybrid electric vehicle, and electric vehicle. ADVANTAGE - The solid-state electrochemical cell comprises the interface layer which is effective to suppress unintended side reactions between lithium metal and solid electrolyte, and reduces the interface impedance between the solid electrode and solid electrolyte. DESCRIPTION OF DRAWING(S) - The drawing shows a sectional view of the all-solid-state battery. 20Solid-state electrochemical cell 22Negative electrode 24Positive electrode 26Solid electrolyte 28Interface layer