Disclosed herein are ionic liquid electrolytes comprising lithium cations, sodium cations, organic cations, and fluorinated anions, wherein a concentration of the lithium cations is about 1.3 M or greater. Also disclosed are batteries comprising an anode, a cathode, and the electrolyte of this disclosure disposed between the anode and the cathode.

Provided is a production apparatus of a non-aqueous electrolyte solution that can produce conveniently and at a low cost the non-aqueous electrolyte solution while readily controlling an acidic impurity concentration so as to be in a prescribed level.

The production apparatus of the non-aqueous electrolyte solution includes an original liquid tank that stores a liquid to be processed containing a non-aqueous electrolyte solution, and an ion-exchange resin container that accommodates a weakly basic anion-exchange resin, and also including a liquid circulation pipe that returns the liquid to be processed that is obtained after flowing the liquid to be processed from the original liquid tank through the ion-exchange resin container to the original liquid tank.

Provided is a production apparatus of a non-aqueous electrolyte solution that can produce conveniently and at a low cost the non-aqueous electrolyte solution while readily controlling an acidic impurity concentration so as to be in a prescribed level.

The production apparatus of the non-aqueous electrolyte solution includes an original liquid tank that stores a liquid to be processed containing a non-aqueous electrolyte solution, and an ion-exchange resin container that accommodates a weakly basic anion-exchange resin, and also including a liquid circulation pipe that returns the liquid to be processed that is obtained after flowing the liquid to be processed from the original liquid tank through the ion-exchange resin container to the original liquid tank.

There are provided an aqueous electrolyte solution having an extended potential window, in particular, an aqueous electrolyte solution whose potential window is further wider than those exhibited by conventional concentrated aqueous electrolyte solutions, and an aqueous electrolyte solution in which the cycle characteristics can be improved. A non-aqueous electrolyte solution capable of achieving a higher energy density is provided, the non-aqueous electrolyte solution containing easily available and inexpensive materials and having further improved characteristics. One aqueous electrolyte solution of the present embodiment contains a salt of at least one selected from the group consisting of sodium, magnesium, potassium and lithium, and a chaotropic additive. One other non-aqueous electrolyte solution of the present embodiment contains a salt of at least one selected from the group consisting of sodium, magnesium, potassium and lithium, and a chaotropic additive.

A secondary battery includes a positive electrode, a negative electrode, and an electrolytic solution. The positive electrode includes a positive electrode active material layer. The positive electrode active material layer includes a lithium-nickel composite oxide of a layered rock-salt type.

Provided is a binder composition for a non-aqueous secondary battery electrode with which it is possible to form an electrode having excellent electrolyte solution injectability and process adhesiveness. The binder composition for a non-aqueous secondary battery electrode contains a particulate polymer formed by a polymer that includes a block region composed of an aromatic vinyl monomer unit and has a tetrahydrofuran-insoluble content of not less than 5 mass % and not more than 40 mass %. The binder composition for a non-aqueous secondary battery electrode preferably further contains a water-soluble polymer that includes a hydrophilic group and has a weight-average molecular weight of not less than 15,000 and not more than 500,000.

A secondary battery includes a battery element including a positive electrode, a negative electrode, and an electrolytic solution, a housing member configured to accommodate the battery element, and a safety valve mechanism attached to the housing member. The safety valve mechanism includes a valve member including an opening valve portion configured to be opened; and an opening member including a plurality of opening portions radially arranged in a region opposed to the opening valve portion from a center of the region as a base point, and a plurality of protrusion portions radially arranged in a region outside the plurality of opening portions from the center and the plurality of protrusion portions protrude toward the plurality of opening portions. A number of the opening portions and a number of the protrusion portions are equal to each other, and each of the plurality of opening portions and each of the plurality of protrusion portions are opposed to each other in a direction toward the center.

A secondary battery includes a battery element including a positive electrode, a negative electrode, and an electrolytic solution, a housing member configured to accommodate the battery element, and a safety valve mechanism attached to the housing member. The safety valve mechanism includes a valve member including an opening valve portion configured to be opened; and an opening member including a plurality of opening portions radially arranged in a region opposed to the opening valve portion from a center of the region as a base point, and a plurality of protrusion portions radially arranged in a region outside the plurality of opening portions from the center and the plurality of protrusion portions protrude toward the plurality of opening portions. A number of the opening portions and a number of the protrusion portions are equal to each other, and each of the plurality of opening portions and each of the plurality of protrusion portions are opposed to each other in a direction toward the center.

A battery module of the present disclosure includes a battery case, at least one sulfide-based battery disposed inside the battery case, and at least one halogen-based battery disposed inside the battery case. A vehicle of the present disclosure includes the battery module and an electric motor configured to be driven by electric power supplied from the battery module. A method of manufacturing a battery module of the present disclosure includes disposing at least one sulfide-based battery inside the battery case and disposing at least one halogen-based battery inside the battery case.

A battery module of the present disclosure includes a battery case, at least one sulfide-based battery disposed inside the battery case, and at least one halogen-based battery disposed inside the battery case. A vehicle of the present disclosure includes the battery module and an electric motor configured to be driven by electric power supplied from the battery module. A method of manufacturing a battery module of the present disclosure includes disposing at least one sulfide-based battery inside the battery case and disposing at least one halogen-based battery inside the battery case.