The invention relates to a cell culture container that inhibits adhesion of cells, a method for manufacturing the same and a method for producing cell aggregates using the same. The cell culture container has a coating film containing a copolymer having a recurring unit which contains a group represented by formula (a) and a recurring unit which contains a group represented by formula (b): ##STR00001##
wherein U.sup.a1, U.sup.a2, U.sup.b1, U.sup.b2 and U.sup.b3 each independently represent a hydrogen atom or a linear or branched alkyl group having 1 to 5 carbon atoms, and An.sup. represents an anion selected from the group consisting of a halide ion, an inorganic acid ion, a hydroxide ion and an isothiocyanate ion, on at least a part of a surface of the container, and the volume of the container is 20 L or less.

A ternary blended positive electrode material and a preparation method thereof and a battery are provided. The preparation method includes mixing a ternary material, a lithium manganese iron phosphate material and a coating material, and performing high-energy ball milling on the obtained mixture to obtain the ternary blended positive electrode material. The coating material includes a polyphosphazene intermediate.

A ternary blended positive electrode material and a preparation method thereof and a battery are provided. The preparation method includes mixing a ternary material, a lithium manganese iron phosphate material and a coating material, and performing high-energy ball milling on the obtained mixture to obtain the ternary blended positive electrode material. The coating material includes a polyphosphazene intermediate.

A composition includes a polymer and a solvent. The polymer includes a group (X) which is at least one selected from the group consisting of: a group including at least two cyano groups; a group including B(OR).sub.2; a group including PO(OR).sub.2; and a group including P(OR).sub.2. Each R independently represents a hydrogen atom or a monovalent hydrocarbon group having 1 to 10 carbon atoms. The polymer preferably includes the group (X) at an end of a main chain thereof or at an end of a side chain thereof.

A composition includes a polymer and a solvent. The polymer includes a group (X) which is at least one selected from the group consisting of: a group including at least two cyano groups; a group including B(OR).sub.2; a group including PO(OR).sub.2; and a group including P(OR).sub.2. Each R independently represents a hydrogen atom or a monovalent hydrocarbon group having 1 to 10 carbon atoms. The polymer preferably includes the group (X) at an end of a main chain thereof or at an end of a side chain thereof.