The invention provides an
electrolyte material (LiaPbScMd) for an all
solid-state
lithium secondary battery and a preparation method for the
electrolyte material. The
electrolyte material, shown in a formula (I) LiaPbScMd, for the all
solid-state
lithium secondary battery is prepared from Li2S, P2S5 and a
dopant, wherein the
dopant is selected from one or more of compounds of
nonmetal elements in main groups III, IV, V, VI and VII of
lithium and compounds formed from at least two of the
nonmetal elements in the main groups III, IV, V, VI and VII; in the formula (I), M is selected from one or more of the
nonmetal elements in the main groups III, IV, V, VI and VII, a is more than 0 and less than or equal to 10, b is more than 0 and less than or equal to 5, c is more than 0 and less than or equal to 15, and d is more than 0 and less than 1. The electrolyte material for the all
solid-state lithium secondary battery has high electrical
conductivity, high electrochemical stability and the like, and is favorable for application. The invention also provides the all solid-state lithium secondary battery.