Abstract: A solid state battery that includes a solid state battery laminate including a positive electrode layer, a negative electrode layer, and a solid electrolyte layer interposed between the positive electrode layer and the negative electrode layer; and a member surrounding or in contact with the solid state battery, the member containing a moisture absorbing material.

Abstract: An ion-conducting composite electrolyte membrane with strength improved without impairing ionic conductivity, and a fuel cell using the same are provided. The proton conductive composite electrolyte membrane includes an electrolyte which includes an ion-dissociating functional group and is made of a fullerene derivative or sulfonated pitch within a range of 5 wt % to 85 wt % both inclusive, and a binder which has a weight-average molecular weight of 550000 or over and a logarithmic viscosity of 2 dL/g or over, and is made of a fluorine-based polymer such as polyvinylidene fluoride and a copolymer of polyvinylidene fluoride and hexafluoropropylene within a range of 15 wt % to 95 wt % both inclusive.

Abstract: An ion-conducting composite electrolyte membrane with strength improved without impairing ionic conductivity, and a fuel cell using the same are provided. The proton conductive composite electrolyte membrane includes an electrolyte which includes an ion-dissociating functional group and is made of a fullerene derivative or sulfonated pitch within a range of 5 wt % to 85 wt % both inclusive, and a binder which has a weight-average molecular weight of 550000 or over and a logarithmic viscosity of 2 dL/g or over, and is made of a fluorine-based polymer such as polyvinylidene fluoride and a copolymer of polyvinylidene fluoride and hexafluoropropylene within a range of 15 wt % to 95 wt % both inclusive.

Abstract: Provided are an ion-conductive composite electrolyte that improves ionic conductivity, a membrane-electrode assembly and an electrochemical device using the same, and a method for producing an ion-conductive composite electrolyte membrane. A proton-conductive composite electrolyte contains an electrolyte having a proton-dissociative group (—SO3H) and a compound having a Lewis acid group MXn-1, wherein the Lewis acid group and the proton-dissociative group interact with each other. The compound having the Lewis acid group is a Lewis acid compound MXn or a polymer having a Lewis acid group MXn-1. The electrolyte having a proton-dissociative group is, for example, a fullerene derivative. A proton-conductive composite electrolyte membrane is formed using a solvent having a donor number of 25 or less, and a membrane-electrode assembly using the same is suitable for use in a fuel cell.

Abstract: There are provided an ion-conducting microparticle including an ion-dissociative group and exhibiting an affinity for a fluorine-containing resin, and a method of manufacturing the same, an ion-conducting composite including the ion-conducting microparticle, a membrane electrode assembly (MEA) including the ion-conducting composite as an electrolyte, and an electrochemical device such as a fuel cell.

Abstract: Provided are an ion-conductive composite containing ion-conductive fine particles and a vinylidene fluoride homopolymer or copolymer and having excellent ion conductivity, a membrane electrode assembly (MEA) including the ion-conductive composite as an electrolyte, and an electrochemical device, such as a fuel cell. An ion-conductive composite is formed of ion-conductive fine particles having an ion-dissociative group and a vinylidene fluoride homopolymer or copolymer. Here, a vinylidene fluoride homopolymer or copolymer having a ?-type crystal structure is used. Since polyvinylidene fluoride having the ?-type crystal structure has a large dipole moment in a direction that is orthogonal to the direction of the molecular chain, permittivity in the vicinity of ion-conductive fine particles can be kept high, thus facilitating ionic conduction. As a result, the decrease in ion conductivity can be minimized when the composite is formed.

Abstract: Provided are a proton-conductive composite electrolyte, a membrane-electrode assembly, and a fuel cell in which an improvement of the proton conductivity, and suppression of crossover and insolubilization are satisfied at the same time. The proton-conductive composite electrolyte includes an electrolyte having a proton-dissociative group (—SO3H) and a compound having a Lewis acid group MXn?1, wherein the Lewis acid group and the proton-dissociative group are interacted with each other. The compound having the Lewis acid group is a Lewis acid compound MXn or a polymer having a Lewis acid group MXn?1. The electrolyte having a proton-dissociative group is a fluorine-containing electrolyte, an electrolyte composed of a hydrocarbon-based resin, an inorganic resin, a hybrid resin of an organic resin and an inorganic resin, or the like, or a fullerene compound.

Abstract: A mixture, cation conductor and electrochemical device using same are provided. The mixture and a cation conductor, in which cations can be moved without humidification even in a range of temperatures less than or equal to the boiling point of water, or an electrochemical device such as a fuel cell using them. A fuel electrode and an oxygen electrode, which are oppositely arranged with an electrolyte film in between, is provided. The electrolyte film contains a first compound formed of an imidazole derivative containing N having an unshared electron pair and a second compound of at least one selected from the group consisting of compounds having structures shown below.

Abstract: A mixture, cation conductor and electrochemical device using same are provided. The mixture and a cation conductor, in which cations can be moved without humidification even in a range of temperatures less than or equal to the boiling point of water, or an electrochemical device such as a fuel cell using them. A fuel electrode and an oxygen electrode, which are oppositely arranged with an electrolyte film in between, is provided. The electrolyte film contains a first compound formed of an imidazole derivative containing N having an unshared electron pair and a second compound of at least one selected from the group consisting of compounds having structures shown below.

Abstract: A proton conductor is provided. The proton conductor includes a zwitterion salt such as MeImPrSO3 and a proton (H+) donor such as HTFSI. An electrochemical device having a stacked layer structure formed of a first electrode, a second electrode and a proton conducting layer held between these electrodes, wherein the proton conducting layer includes a proton conductor according to the present invention. The present invention can, therefore, provide a proton conductor and electrochemical device, which can be suitably used in a dry state or under high-temperature, non-humidified conditions, can obviate a complex accessory such as a humidifier, and can simplify the system.

Abstract: An ionic conductor insoluble to water and fuel, and capable of stably allowing ions such as protons to conduct therethrough, a method of manufacturing the same, and an electrochemical device. The ionic conductor having a derivative in which an ion-dissociative group is bound to a carbonaceous substance composed of at least one species selected from the group consisting of fullerene molecule, cluster mainly composed of carbon, and structure of linear or tubular carbon; and a polymer of a substance having a basic group. A method of manufacturing an ionic conductor having a step of dissolving the above-described derivative; and a polymer of the substance having the basic group; into a solvent to thereby prepare a homogeneous solution; and a step of removing the solvent. An electrochemical device having a negative electrode, a positive electrode, and an ionic conductor held therebetween, wherein the ionic conductor is composed of the ionic conductor of the present invention described in the above.