Abstract: Provided is an electrode material containing an electrode active material and a polymer having an ability to preferentially conduct metal ions, in which a volume ratio of the polymer to a total volume of the electrode active material and the polymer is 0.01 to 0.65.

Abstract: Provided is a positive electrode material containing a positive electrode active material and a polymer having an ability to preferentially conduct metal ions, in which the positive electrode active material is a material that occludes and releases lithium ions at 4.0 V or more with respect to Li/Li+.

Abstract: Provided is a battery including a positive electrode layer, a negative electrode layer, and an electrolyte layer disposed between the positive electrode layer and the negative electrode layer, in which the electrolyte layer contains a polymer having an ability to preferentially conduct metal ions, and a thickness ratio between the positive electrode layer and the electrolyte layer is 10:1 to 0.5:1.

Abstract: An electrolyte composition contains an ion conductive inorganic solid electrolyte, a polymer having an ability to preferentially conduct metal ions, and an ionic liquid.

Abstract: A polymer containing a structural unit (A) having an anion moiety with an alkali metal ion as a counter cation and a structural unit (B) having a functional group with a function as an anion receptor.

Abstract: Provided is a separator for an electrochemical device which separator improves a cycle characteristic of an electrochemical device. The separator of the present disclosure includes a porous layer that contains a resin and is such that a value expressed by the following formula (1) is less than 0.05: C / ( A × B ) ( 1 ) where A is a resin content [% by weight] in the porous layer, B is a porosity [%] of the porous layer, and C is an air permeability [sec/100 mL] of the separator.

Abstract: Provided is a separator for an electrochemical device which separator achieves both high ion permeability and a low moisture content. The separator of the present disclosure includes a porous layer that contains two or more nitrogen-containing aromatic resins and that has a filler content of not less than 0% by weight and less than 20% by weight.

Abstract: Provided is a separator for an electrochemical device which separator has excellent heat resistance in a case where heat is externally applied to the separator. The separator of the present disclosure includes a polyolefin porous substrate and a porous layer formed on the polyolefin porous substrate, and has a thermal diffusivity of not more than 0.04 mm2/s at 25° C.

Abstract: Provided is a polymer including: a structural unit (A) represented by the following formula (A); and a second structural unit represented by the following formula (B1) or (B2), in which a ratio m of the structural unit (A) to total structural units in the polymer is 0.2 to 0.8, and a ratio n of the second structural unit thereto is 0.2 to 0.8. (In formula (A), X is a divalent group, Y is a monovalent group, and M is an alkali metal element.) (In formula (B1), R1 to R4 are each a hydrogen atom or a monovalent group.) (In formula (B2), R15 is a divalent group, and R16 and R17 are each a hydrogen atom or a monovalent group.