Abstract: The present disclosure provides a negative electrode active material for a fluoride ion battery capable of realizing high charge and discharge capacity, a fluoride ion battery having such a negative electrode active material, and a method for producing such a negative electrode active material for a fluoride ion battery. The negative electrode active material for a fluoride ion battery of the present disclosure has a transition metal carbide having a non-layered structure. The method of the present disclosure for producing a negative electrode active material for a fluoride ion battery comprises applying mechanical impact to a transition metal carbide having a layered structure to convert the transition metal carbide to a transition metal carbide having a non-layered structure.

Abstract: A main object of the present disclosure is to provide an active material of which capacity properties are excellent. The present disclosure achieves the object by providing an active material to be used for a fluoride ion battery, the active material comprising: a composition represented by M1Nx in which M1 is at least one kind of Cu, Ti, V, Cr, Fe, Mn, Co, Ni, Zn, Nb, In, Sn, Ta, W, and Bi, and x satisfies 0.05?x?3; or a composition represented by M2LnyNz in which M2 is at least one kind of Cu, Ti, V, Cr, Fe, Mn, Co, Ni, Zn, Nb, In, Sn, Ta, W, and Bi, Ln is at least one kind of Sc, Y, and lanthanoid, y satisfies 0.1?y?3, and z satisfies 0.15?z?6.

Abstract: A main object of the present disclosure is to provide an active material of which capacity properties are excellent. The present disclosure achieves the object by providing an active material to be used for a fluoride ion battery, the active material comprising: a composition represented by M1NX in which M1 is at least one kind of Cu, Ti, V, Cr, Fe, Mn, Co, Ni, Zn, Nb, In, Sn, Ta, W, and Bi, and x satisfies 0.05?x?3; or a composition represented by M2LnyNz in which M2 is at least one kind of Cu, Ti, V, Cr, Fe, Mn, Co, Ni, Zn, Nb, In, Sn, Ta, W, and Bi, Ln is at least one kind of Sc, Y, and lanthanoid, y satisfies 0.1?y?3, and z satisfies 0.15?z?6.

Abstract: The present disclosure provides a fluoride ion battery comprising a negative electrode active material that can exhibit high charge-discharge capacity, as well as a method for producing it. The fluoride ion battery of the disclosure has LaxC(1.00-x) as the negative electrode active material, where 0.00<x<1.00. The production method of the disclosure includes discharging a fluoride ion battery precursor having LaxC(1.00-x) as the negative electrode active material, where 0.00<x<1.00, until the upper limit potential of the negative electrode reaches 2.5 to 3.5 V vs Pb/PbF2.

Abstract: A main object of the present disclosure is to provide an active material of which capacity properties are excellent. The present disclosure achieves the object by providing an active material to be used for a fluoride ion battery, the active material comprising: a composition represented by M1Nx in which M1 is at least one kind of Cu, Ti, V, Cr, Fe, Mn, Co, Ni, Zn, Nb, In, Sn, Ta, W, and Bi, and x satisfies 0.05?x?3; or a composition represented by M2LnyNz in which M2 is at least one kind of Cu, Ti, V, Cr, Fe, Mn, Co, Ni, Zn, Nb, In, Sn, Ta, W, and Bi, Ln is at least one kind of Sc, Y, and lanthanoid, y satisfies 0.1?y?3, and z satisfies 0.15?z?6.

Abstract: A main object of the present disclosure is to provide a cathode active material with excellent capacity properties. In order to achieve the object, the present disclosure provides a cathode active material to be used in a fluoride ion battery wherein the cathode active material mainly contains a metal element M and a metal element M?; the metal element M is at least one kind of Cu, Fe and Mn; and the metal element M? is at least one kind of Y, La, Ce, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho and Yb.

Abstract: A main object of the present disclosure is to provide a cathode active material with excellent capacity properties. In order to achieve the object, the present disclosure provides a cathode active material to be used in a fluoride ion battery wherein the cathode active material mainly contains a metal element M and a metal element M?; the metal element M is at least one kind of Cu, Fe and Mn; and the metal element M? is at least one kind of Y, La, Ce, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho and Yb.

Abstract: Decomposition of an aqueous electrolyte solution when an aqueous lithium ion secondary battery is charged and discharged is suppressed, and the operating voltage of the battery is improved. The aqueous lithium ion secondary battery includes an anode, a cathode, and an aqueous electrolyte solution, the anode including a composite of an anode active material and polytetrafluoroethylene, wherein peaks of the polytetrafluoroethylene at around 1150 cm?1 and at around 1210 cm?1 are observed in FT-IR measurement of the composite, but a peak of the polytetrafluoroethylene at around 729 cm?1 is not observed in Raman spectroscopy measurement of the composite.

Abstract: A main object of the present disclosure is to provide an active material of which capacity properties are excellent. The present disclosure achieves the object by providing an active material to be used for a fluoride ion battery, the active material comprising: a composition represented by M1Nx in which M1 is at least one kind of Cu, Ti, V, Cr, Fe, Mn, Co, Ni, Zn, Nb, In, Sn, Ta, W, and Bi, and x satisfies 0.05?x?3; or a composition represented by M2LnyNz in which M2 is at least one kind of Cu, Ti, V, Cr, Fe, Mn, Co, Ni, Zn, Nb, In, Sn, Ta, W, and Bi, Ln is at least one kind of Sc, Y, and lanthanoid, y satisfies 0.1?y?3, and z satisfies 0.15?z?6.

Abstract: Decomposition of an aqueous electrolyte solution when an aqueous lithium ion secondary battery is charged and discharged is suppressed, and the operating voltage of the battery is improved. The aqueous lithium ion secondary battery includes an anode, a cathode, and an aqueous electrolyte solution, the anode including a composite of an anode active material and polytetrafluoroethylene, wherein peaks of the polytetrafluoroethylene at around 1150 cm?1 and at around 1210 cm?1 are observed in FT-IR measurement of the composite, but a peak of the polytetrafluoroethylene at around 729 cm?1 is not observed in Raman spectroscopy measurement of the composite.

Abstract: Decomposition of an aqueous electrolyte solution when an aqueous lithium ion secondary battery is charged and discharged is suppressed, and the operating voltage of the battery is improved. The aqueous lithium ion secondary battery includes an anode, a cathode, and an aqueous electrolyte solution, the anode including a composite of an anode active material and polytetrafluoroethylene, wherein peaks of the polytetrafluoroethylene at around 1150 cm?1 and at around 1210 cm?1 are observed in FT-IR measurement of the composite, but a peak of the polytetrafluoroethylene at around 729 cm?1 is not observed in Raman spectroscopy measurement of the composite.

Abstract: A main object of the present disclosure is to provide an all-solid-state battery with an excellent capacity durability. The present disclosure achieve the object by providing an all-solid-state battery comprising: a cathode active material layer, an anode active material layer, and a solid electrolyte layer formed between the cathode active material layer and the anode active material layer; wherein at least one of the cathode active material layer and the anode active material layer contains a sulfide solid electrolyte and a conductive auxiliary material; the conductive auxiliary material includes a carbon material C1 having a carboxyl group on its surface; and a weight ratio of the carboxyl group to overall of the carbon material C1 is 8 weight % or more.

Abstract: A main object of the present disclosure is to provide a solid electrolyte including excellent fluoride ion conductivity. The present disclosure achieves the object by providing a solid electrolyte including fluoride ion conductivity, the solid electrolyte comprising: a crystal phase having a perovskite structure or a layered perovskite structure; the crystal phase contains A cation positioned in A site, B cation positioned in B site, and a fluoride ion; the A cation contains R1R2R3R4N+ cation (each of R1 to R4 is independently a hydrogen element or a hydrocarbon group with two or less carbon atoms) or a hydrocarbon cation with two or less carbon atoms; and the B cation contains a divalent metal cation and a monovalent metal cation.

Abstract: Disclosed is a dual-ion secondary battery of high power and a high level of safety. The dual-ion secondary battery is an aqueous dual-ion secondary battery including: a cathode; an anode; and an aqueous electrolyte solution, wherein the cathode includes graphite as a cathode active material, the anode includes titanium oxide as an anode active material, and the aqueous electrolyte solution contains no less than 10 mol of lithium bis(trifluoromethanesulfonyl)imide per kilogram of water.

Abstract: A method for producing a sulfide all-solid-state battery with a high capacity retention rate, and a sulfide all-solid-state battery with a high capacity retention rate. The method for producing a sulfide all-solid-state battery may comprise forming a sulfide all-solid-state battery, initially charging the sulfide all-solid-state battery after the forming of the sulfide all-solid-state battery, and exposing the sulfide all-solid-state battery to an oxygen-containing gas atmosphere at at least any one of a time of the initially charging of the sulfide all-solid-state battery and a time after the initially charging of the sulfide all-solid-state battery.

Abstract: Decomposition of an aqueous electrolyte solution when an aqueous lithium ion secondary battery is charged and discharged is suppressed, and the operating voltage of the battery is improved. The aqueous lithium ion secondary battery includes an anode, a cathode, and an aqueous electrolyte solution, the anode including a composite of an anode active material and polytetrafluoroethylene, wherein peaks of the polytetrafluoroethylene at around 1150 cm?1 and at around 1210 cm?1 are observed in FT-IR measurement of the composite, but a peak of the polytetrafluoroethylene at around 729 cm?1 is not observed in Raman spectroscopy measurement of the composite.

Abstract: Disclosed is a method for producing an anode that can suppress decomposition of an aqueous electrolyte solution when the anode is applied to an aqueous lithium ion secondary battery, the method being for producing an anode for an aqueous lithium ion secondary battery, the method including: a first step of touching an anode that is electrochemically kept in a reduction or oxidation state to a nonaqueous electrolyte solution in which a lithium salt is dissolved, to form a film over a surface of the anode; and a second step of cleaning the anode, over the surface of which the film is formed.

Abstract: Disclosed is a dual-ion secondary battery of high power and a high level of safety. The dual-ion secondary battery is an aqueous dual-ion secondary battery including: a cathode; an anode; and an aqueous electrolyte solution, wherein the cathode includes graphite as a cathode active material, the anode includes titanium oxide as an anode active material, and the aqueous electrolyte solution contains no less than 10 mol of lithium bis(trifluoromethanesulfonyl)imide per kilogram of water.

Abstract: A main object of the present disclosure is to provide an all-solid-state battery with an excellent capacity durability. The present disclosure achieve the object by providing an all-solid-state battery comprising: a cathode active material layer, an anode active material layer, and a solid electrolyte layer formed between the cathode active material layer and the anode active material layer; wherein at least one of the cathode active material layer and the anode active material layer contains a sulfide solid electrolyte and a conductive auxiliary material; the conductive auxiliary material includes a carbon material C1 having a carboxyl group on its surface; and a weight ratio of the carboxyl group to overall of the carbon material C1 is 8 weight % or more.

Abstract: Provided is a method of producing a sulfide solid electrolyte according to which an amount of residual elemental sulfur can be reduced with simple steps. The method of producing a sulfide solid electrolyte comprises: loading raw material for electrolytes, and elemental sulfur into a vessel, the raw material containing at least Li2S and P2S5; and after said loading, amorphizing a raw material composition consisting of the raw material for electrolytes and the elemental sulfur, and synthesizing material for sulfide solid electrolyte; and after said amorphizing, heat-treating the material for sulfide solid electrolytes under an inert atmosphere at a temperature no less than a melting point of the elemental sulfur.