Abstract: A composite particle comprising: a positive electrode active material particle; and a coating film, wherein the coating film covers at least part of a surface of the positive electrode active material particle, and the coating film includes fluorine and at least one selected from the group consisting of phosphorus and a glass network forming element.

Abstract: A fluoride ion secondary battery includes: a positive electrode layer including an element from the group consisting of a first metal element, a carbon element, and a sulfur element, the positive electrode layer capable of fluorination and defluorination; a solid electrolyte layer including a first solid electrolyte material including a second metal element; and a negative electrode layer including a second solid electrolyte material and at least one, from the group consisting of particles of a simple substance of Al and particles of an Al alloy, the second solid electrolyte material including a third metal element. The second and third metal elements each have lower fluorination potential and defluorination potential than the at least one element included in the positive electrode layer and an aluminum element have, the at least one element being selected from the group consisting of the first metal element, the carbon element, and the sulfur elements.

Abstract: A main object of the present disclosure is to provide a new active material that can be used in a fluoride ion battery. The present disclosure achieves the object by providing an active material to be used in a fluoride ion battery, the active material comprising: a crystal phase including an infinite layer structure, and represented by ApBqOr, provided that A is at least one of an alkali earth metal element and a rare earth element, B is a transition metal element, p satisfies 0.8?p?1, q satisfies 0.8?q?1, and r satisfies 1.5?r?2.5.

Abstract: A main object of the present disclosure is to provide an anode material that is used in a fluoride ion battery and can prevent the decrease in operating voltage while inhibiting occurrence of short circuit. The present disclosure achieves the object by providing an anode material to be used in a fluoride ion battery, the anode material comprising a Mg material containing a Mg element, and a fluoride ion conductive material containing at least one kind of metal element excluding a Mg element, and a F element.

Abstract: A main object of the present disclosure is to provide a novel cathode active material that can be used in a fluoride ion battery. The present disclosure achieves the object by providing a cathode active material used in a fluoride ion battery, the cathode active material comprising: a composition represented by Pb2MF6, in which M is at least one of Mn, Fe, Co, and Ni.

Abstract: A main object of the present disclosure is to provide a cathode active material used for a fluoride ion battery, the cathode active material comprising: a first active material having a composition represented by Pb2?xCu1+xF6, wherein 0?x<2; and a second active material containing a Bi element and a F element.

Abstract: A main object of the present disclosure is to provide a novel cathode active material that can be used in a fluoride ion battery. The present disclosure achieves the object by providing a cathode active material used in a fluoride ion battery, the cathode active material comprising: a composition represented by Pb2MF6, in which M is at least one of Mn, Fe, Co, and Ni.

Abstract: An object of the present disclosure relates to an electrode active material that has excellent discharge capacity and is used in an all solid fluoride ion battery. The present disclosure achieves the object by providing an electrode active material to be used in an all solid fluoride ion battery, the electrode active material comprising: an active material region that contains an active material component including a layered structure; and a coating region positioned in a surface side of the active material region; and a fluorine concentration in the coating region is higher than a fluorine concentration in the active material region.

Abstract: A fluoride ion battery in which occurrence of short circuit is inhibited by providing a fluoride ion battery including: an electrode layer that includes a first metal element or a carbon element and is capable of fluorination and defluorination; a solid electrolyte layer containing a solid electrolyte including a second metal element with lower fluorination potential and defluorination potential than those of the first metal element or of the carbon element; and an anode current collector, in this order; and an anode active material layer is not present between the solid electrolyte layer and the anode current collector; and the solid electrolyte layer comprises: on the anode current collector side surface, a short circuit inhibiting part containing the solid electrolyte; a Ce compound containing a Ce element, a S element, and a F element; and an electron conductive material.

Abstract: A main object of the present disclosure is to provide a novel cathode active material that may be used for a fluoride ion battery. The present disclosure achieves the object by providing a cathode active material used for a fluoride ion battery, comprising a composition represented by Pb2?xCu1+xF6, wherein 0?x<2.

Abstract: An active material has a favorable capacity property. The active material is to be used for a fluoride ion battery, the active material including a crystal phase having a perovskite structure, and represented by ABO3 or a fluoride of the ABO3, in which the A and the B are different metal elements; the A includes at least one kind of a metal element belonging to Group 2 and Group 3 in the periodic table; and the B includes at least one kind of a transition metal element belonging to Period 4 to Period 6 in the periodic table.

Abstract: An object of the present disclosure is to provide a fluoride ion battery of which power generating elements (a cathode active material layer, a solid electrolyte layer, and an anode active material layer) may be formed by two kinds of members: an electrode layer and a solid electrolyte layer. The present disclosure achieves the object by providing a fluoride ion battery comprising: an electrode layer that includes a first metal element or a carbon element and has capability of fluorination and defluorination; a solid electrolyte layer containing a solid electrolyte material, the solid electrolyte material including a second metal element with lower fluorination potential and defluorination potential than the potentials of the first metal element or the carbon element; and an anode current collector, in this order; and an anode active material layer being not present between the solid electrolyte layer and the anode current collector.

Abstract: A fluoride ion battery in which an occurrence of a short circuit is suppressed achieves the object by providing a fluoride ion battery including: an electrode layer that includes a first metal element or a carbon element and has capability of fluorination and defluorination; a solid electrolyte layer containing a solid electrolyte material, the solid electrolyte material including a second metal element with lower fluorination potential and defluorination potential than the potentials of the first metal element or the carbon element; and an anode current collector, in this order; and an anode active material layer being not present between the solid electrolyte layer and the anode current collector; and at least one of the solid electrolyte layer and the anode current collector includes a simple substance of Pb, Sn, In, Bi, or Sb, or an alloy containing one or more of these metal elements.

Abstract: A main object of the present disclosure is to provide a fluoride ion battery having a high charge-discharge potential. The present disclosure achieves the object by providing a fluoride ion battery comprising a cathode active material layer, an anode active material layer, and an electrolyte layer formed between the cathode active material layer and the anode active material layer, and the cathode active material layer includes a cathode active material having a composition represented by CuxS, wherein 1?x?2.

Abstract: A main object of the present disclosure is to provide a fluoride ion battery in which reduction decomposition of a solid electrolyte is inhibited. The present disclosure achieves the object by providing a fluoride ion battery, comprising a cathode layer, an anode layer, and a solid electrolyte layer formed between the cathode layer and the anode layer; wherein the anode layer contains an anode active material having a composition represented by La(1-x)SnxF(3-x), in which 0.1?x?0.8; and the solid electrolyte layer contains a solid electrolyte including a crystal phase of a Tysonite structure.

Abstract: A main object of the present disclosure is to provide a cathode active material that is used in a fluoride ion battery and is capable of being charged and discharged at a high potential. The present disclosure achieves the object by providing a cathode active material used in a fluoride ion battery, the cathode active material comprising: a Ce element, a S element, and a F element; and a composition represented by CeSF.

Abstract: A main object of the present disclosure is to provide a cathode active material used for a fluoride ion battery, the cathode active material comprising: a first active material having a composition represented by Pb2?xCu1+xF6, wherein 0?x<2; and a second active material containing a Bi element and a F element.

Abstract: A main object of the present disclosure is to provide a fluoride ion battery in which occurrence of short circuit is inhibited. The present disclosure achieves the object by providing a fluoride ion battery comprising: an electrode layer that includes a first metal element or a carbon element and is capable of fluorination and defluorination; a solid electrolyte layer containing a solid electrolyte including a second metal element with lower fluorination potential and defluorination potential than those of the first metal element or of the carbon element; and an anode current collector, in this order; and an anode active material layer is not present between the solid electrolyte layer and the anode current collector; and the solid electrolyte layer comprises: on the anode current collector side surface, a short circuit inhibiting part containing the solid electrolyte; a Ce compound containing a Ce element, a S element, and a F element; and an electron conductive material.

Abstract: An object of the present disclosure is to provide a solid electrolyte material with excellent ion conductivity at a low temperature. The present disclosure achieves the object by providing a solid electrolyte material to be used for a fluoride ion battery, the solid electrolyte material comprising: a solid electrolyte particle including a crystal phase, that has a Tysonite structure and contains an F element, as a main phase; and CsF; and the CsF content in the solid electrolyte material is 50% by weight or less.

Abstract: A fluoride ion battery in which an occurrence of a short circuit is suppressed achieves the object by providing a fluoride ion battery including: an electrode layer that includes a first metal element or a carbon element and has capability of fluorination and defluorination; a solid electrolyte layer containing a solid electrolyte material, the solid electrolyte material including a second metal element with lower fluorination potential and defluorination potential than the potentials of the first metal element or the carbon element; and an anode current collector, in this order; and an anode active material layer being not present between the solid electrolyte layer and the anode current collector; and at least one of the solid electrolyte layer and the anode current collector includes a simple substance of Pb, Sn, In, Bi, or Sb, or an alloy containing one or more of these metal elements.