▎ 摘　　要

NOVELTY - Sodium super ion conductor structure containing high-entropy metal phosphate i.e. phosphate compound (I) is new. USE - (I) is useful in the preparing sodium ion battery electrode material (claimed). ADVANTAGE - The method: has simple process and high product yield; utilizes cheap and easily available raw material; and is suitable for industrial production. (I): exhibits high energy density and excellent cycling stability due to multi-metal redox centers and high-entropy effect. DETAILED DESCRIPTION - Sodium super ion conductor (NASICON) structure containing high-entropy metal phosphate i.e. phosphate compound of formula (Ax(M1M2M3-Mn)2(PO4)3) (I) is new. A = alkali metal including Na, K, or Li; x = 3-4; M = metal; and M1, M2, M3 and Mn = different metal species. An INDEPENDENT CLAIM is included for preparation of (I).