Method for producing electrode, method for producing electrode paste, and sodium secondary battery

Abstract

The present invention provides a method for producing an electrode and a method for producing an electrode paste, and a sodium secondary battery. The method for producing an electrode includes the following steps (1) to (5) in this order: (1) a step of bringing a raw material of P (phosphorus), a raw material of A (wherein A represents one or more elements selected from the group consisting of alkali metal elements and A comprises Na), a raw material of M (wherein M represents one or more elements selected from the group consisting of transition metal elements), and water into contact with each other and generating a liquid-like material thereby, (2) a step of heating the liquid-like material and generating a precipitate of an electrode active material thereby, and then collecting the precipitate by solid-liquid separation, (3) a step of mixing the collected precipitate and a binder and producing an electrode paste thereby, (4) a step of applying the electrode paste on a current collector and forming an applied film thereby, and (5) a step of drying the applied film and producing an electrode thereby. The sodium secondary battery has the electrode produced by the method as a positive electrode. The method for producing the electrode paste includes the following steps (11) to (13) in this order: (11) a step of bringing a raw material of P (phosphorus), a raw material of A (wherein A represents one or more elements selected from the group consisting of alkali metal elements and A comprises Na), a raw material of M (wherein M represents one or more elements selected from the group consisting of transition metal elements), and water into contact with each other and generating a liquid-like material thereby, (12) a step of heating the liquid-like material and generating a precipitate of an electrode active material thereby, and then collecting the precipitate by solid-liquid separation, and (13) a step of mixing the collected precipitate and a binder and producing an electrode paste thereby.

Dependencies are inferred from the claim text.