NOVELTY - Battery packaging material comprises an outer protective layer, a barrier layer containing aluminum or aluminum alloy, an inner sealant layer, and a surface treatment layer formed on at least one side of the barrier layer. The surface treatment layer is an organic-inorganic composite formed by composition comprising metal or its alloys, aminated phenolic polymer (I) and phosphoric acid compounds. The inner sealant layer comprises modified adhesive resin layer, barrier resin layer comprising thermoplastic elastomers, and heat sealing resin layer including heat sealing olefin-based resin.    USE - Used as battery packaging material.    ADVANTAGE - The battery packaging material comprises strongly adhered sealant layer and surface treatment layer having improved corrosion resistance; avoids delamination of aluminum barrier layer and inner sealant layer; solves the problem of occurrence of efflorescence in inner sealant layer during molding; and has excellent acid resistance, performance and formability.    DETAILED DESCRIPTION - Battery packaging material comprises an outer protective layer (10), a barrier layer containing aluminum or aluminum alloy, an inner sealant layer (30), and a surface treatment layer (21a, 21b) formed on at least one side of the barrier layer (23). The surface treatment layer is an organic-inorganic composite formed by composition comprising at least one metal (titanium, zirconium, hafnium, nickel, and zinc) or its alloys, aminated phenolic polymer of formula (I) and phosphoric acid compounds. The inner sealant layer comprises modified adhesive resin layer comprising resin having melting point of greater than or equal to 130 degrees C and melt index of less than or equal to 20, barrier resin layer comprising thermoplastic elastomers including styrene-ethylene copolymer, butylene styrene copolymer, styrene-butylene-styrene copolymer and/or styrene ethylene butylene styrene copolymer, and heat sealing resin layer including heat sealing olefin-based resin with heat sealing temperature of more than 170 degrees C.    R1 = 1-6C alkylene (optionally substituted);    R2, R3 = H or OH;    Y1 = amino containing water-soluble functional group of formula (II), 1-18C alkyl, 3-18C alicyclic group or 6-18C aryl;    m = 1-4;    n = 1-1000; and    R7-R10 = H, 1-6C alkyl (optionally substituted by OH, NH2, SH or phosphate group) or 6-18C aryl.    An INDEPENDENT CLAIM is also included for preparing battery packaging material comprising the components as mentioned above, where the surface treatment layer is formed by coating composition comprising metal or its alloys, (I) and phosphoric acid compounds on the barrier layer to form organic-inorganic composite layer and drying.    DESCRIPTION OF DRAWING(S) - The drawing shows a schematic representation of battery packaging material.    Outer protective layer (10)    Surface treatment layer (21a, 21b)    Barrier layer (23)    Inner sealant layer (30)