Abstract: The electrode material according to one aspect of the present disclosure includes a first active material particle, a second active material particle, and a solid electrolyte. The first active material particle and the second active material particle each include Li, Ti, and O. The ratio of the average particle size of the second active material particle to the average particle size of the first active material particle is greater than or equal to 1.5 and less than or equal to 6.0. The battery according to one aspect of the present disclosure includes a positive electrode, a negative electrode, and an electrolyte layer located between the positive electrode and the negative electrode. At least one selected from the group consisting of the positive electrode and the negative electrode includes the electrode material.

Abstract: A cathode active material includes a lithium composite oxide having a crystal structure which belongs to a layered structure. The lithium composite oxide has a BET specific surface area of not less than 5 m2/g and not more than 10 m2/g. The lithium composite oxide has an average particle size of not less than 3 ?m and not more than 30 ?m. The lithium composite oxide, an average crystallite size calculated by an X-ray diffraction method is not less than 150 ? and not more than 350 ?.

Abstract: A flow battery includes a first liquid containing a redox mediator, a first electrode, a first active material, and a first circulator that circulates the first liquid between the first electrode and the first active material. The redox mediator contains a heteranthrene compound. The redox mediator contains a heteranthrene compound. The heteranthrene compound has a skeletal structure including a central ring structure, the central ring structure containing no nitrogen.

Abstract: The present disclosure provides a new battery capable of having an increased capacity per weight. A battery according to the present disclosure includes a positive electrode, a negative electrode, and an electrolyte located between the positive electrode and the negative electrode. The positive electrode includes a positive electrode layer containing graphene oxide. The electrolyte includes a Lewis acid containing a pentafluorophenyl group.

Abstract: A primary battery includes: a positive electrode including a positive electrode collector composed of a porous conductor, and a porous positive electrode layer disposed on the positive electrode collector, oxygen taken from outside of the primary battery through the positive electrode collector being allowed to diffuse into the porous positive electrode layer; a negative electrode including a negative electrode collector composed of a porous conductor, and a porous negative electrode layer disposed on the negative electrode collector, the porous negative electrode layer including lithium nitride composed of lithium and nitrogen, nitrogen generated during discharge being allowed to diffuse into the porous negative electrode layer; and a nonaqueous electrolytic solution disposed between the positive electrode and the negative electrode, the nonaqueous electrolytic solution containing a lithium salt.

Abstract: A redox flow battery includes a first nonaqueous liquid that contains a first nonaqueous solvent, a first electrode mediator, and metal ions; a first electrode at least in part in contact with the first nonaqueous liquid; a second nonaqueous liquid that contains a second nonaqueous solvent; a second electrode that is a counter electrode with respect to the first electrode and is at least in part in contact with the second nonaqueous liquid; and a separator that has a plurality of pores and separates the first and second nonaqueous liquids from each other. The plurality of pores have an average diameter larger than a size of each of the metal ions and smaller than a size of an aggregate containing molecules of the first electrode mediator solvated with the first nonaqueous solvent.

Abstract: A redox flow battery includes a first nonaqueous liquid that contains at least one first electrode mediator; a first electrode at least in part in contact with the first nonaqueous liquid; a second nonaqueous liquid; a second electrode that is a counter electrode with respect to the first electrode and is at least in part in contact with the second nonaqueous liquid; and a separator that has at least one pore and separates the first and second nonaqueous liquids from each other. The at least one pore has an inner surface modified with a functional group that contains a hydrocarbon group.

Abstract: A flow battery includes a first nonaqueous liquid; a first electrode at least in part in contact with the first nonaqueous liquid; a second electrode that is a counter electrode with respect to the first electrode; and a separator that separates the first electrode and the second electrode from each other. The separator is made of an ion conductive polymer that has a crosslink structure containing an aromatic ring, the ion conductive polymer has an alkyl main chain that contains a plurality of acidic groups, and at least a subset of the plurality of the acidic groups forms salts with metal ions.

Abstract: A flow battery includes a first liquid containing a first electrode mediator dissolved therein, a first electrode immersed in the first liquid, a first active material immersed in the first liquid, and a first circulation mechanism that circulates the first liquid between the first electrode and the first active material, wherein the first electrode mediator includes a tetrathiafulvalene derivative, and the tetrathiafulvalene derivative has a chain-forming substituent at positions 4,4? and 5,5? of a tetrathiafulvalene skeleton thereof.

Abstract: A cathode active material includes a lithium composite oxide having a crystal structure which belongs to a layered structure. The lithium composite oxide has a BET specific surface area of not less than 5 m2/g and not more than 10 m2/g. The lithium composite oxide has an average particle size of not less than 3 ?m and not more than 30 ?m. The lithium composite oxide, an average crystallite size calculated by an X-ray diffraction method is not less than 150 ? and not more than 350 ?.

Abstract: A flow battery includes: a liquid including redox mediator; an electrode at least partially immersed in the liquid; a second electrode; an active material at least partially immersed in the liquid; and a circulator that circulates the liquid between the electrode and the active material.

Abstract: An air battery includes a negative electrode allowing a metal ion to be occluded in the negative electrode and released from the negative electrode, a positive electrode configured to use oxygen in the air as a positive electrode active material, a nonaqueous metal ion conductor disposed between the negative electrode and the positive electrode, and oxygen evolving catalysts. The positive electrode includes a carbon material. At least one of the oxygen evolving catalysts is fixed to the surface of the carbon material through a Si—O bond.

Abstract: A lithium air battery includes: a negative electrode configured to occlude and release lithium ions; a positive electrode configured to use oxygen in air as a positive electrode active material; and an electrolyte liquid that is configured to function as a nonaqueous lithium ion conductor, and that is disposed between the negative electrode and the positive electrode.

Abstract: A lithium air battery includes a negative electrode allowing a lithium ion to be occluded in the negative electrode and released from the negative electrode; a positive electrode configured to use oxygen in air as a positive electrode active material; a nonaqueous lithium ion conductor disposed between the negative electrode and the positive electrode; and a copper ion present in at least one selected from the group consisting of the positive electrode and the nonaqueous lithium ion conductor.

Abstract: A flow battery includes: a liquid including a redox mediator; an electrode at least partially immersed in the liquid; a second electrode; an active material at least partially immersed in the liquid, and a circulator that circulates the liquid between the electrode and the active material.

Abstract: A flow battery includes a first liquid containing a first electrode mediator dissolved therein, a first electrode immersed in the first liquid, a first active material immersed in the first liquid, and a first circulation mechanism that circulates the first liquid between the first electrode and the first active material, wherein the first electrode mediator includes a tetrathiafulvalene derivative, and the tetrathiafulvalene derivative has a ring-forming substituent at positions 4,4? and 5,5? of a tetrathiafulvalene skeleton thereof.

Abstract: A flow battery includes: a liquid including a redox mediator; an electrode; a second electrode; an active material; and a circulator that circulates the liquid between the electrode and the active material. The redox mediator includes a tetrathiafulvalene derivative.

Abstract: An electrolyte solution for a secondary lithium battery, the electrolyte solution including: a lithium salt, a non-aqueous organic solvent, and a phenanthroline-based compound having a polar substituent. The electrolyte solution enables production of a secondary lithium battery having a good high-temperature lifetime characteristics and good high-temperature preservation characteristics.

Abstract: A positive electrode for an air battery includes a porous body including carbon. The porous body includes first pores each having a pore diameter of 4 nm or more and less than 100 nm and second pores each having a pore diameter of 100 nm or more and 10 ?m or less. In the porous body, a second pore volume is greater than a first pore volume. The second pore volume is a cumulative pore volume of the second pores. The first pore volume is a cumulative pore volume of the first pores.

Abstract: A lithium air battery comprises: a negative electrode configured to occlude and release a lithium ion; a positive electrode configured to use oxygen in air as a positive electrode active material; and a nonaqueous lithium ion conductor disposed between the negative electrode and the positive electrode. The positive electrode contains a copper compound as a catalyst to produce oxygen. The copper compound contains no neutral ligand and contains at least one copper ion and at least one selected from the group consisting of an iodine ion, a bromine ion, and a thiocyanate ion.