SULFIDE SOLID ELECTROLYTE, PREPARATION METHOD THEREFOR, ALL-SOLID-STATE LITHIUM SECONDARY BATTERY, AND DEVICE CONTAINING ALL-SOLID-STATE LITHIUM SECONDARY BATTERY

摘要

Disclosed are a sulfide solid electrolyte and a preparation method therefor, an all-solid-state lithium secondary battery (5), and a device containing the all-solid-state lithium secondary battery (5). The sulfide solid electrolyte is at least compounded by Li₂S, P₂S₅ and a dopant M_xS₂O₃, wherein M is selected from one or more of Na, K, Ba and Ca, and 1 ≤ x ≤ 2.