Abstract: An electrochemical device including a negative electrode made of a magnesium-based material includes an electrolyte solution consisting of a solvent composed of linear ether, and magnesium salt dissolved in the solvent, in which the magnesium salt is dissolved in 3 moles or more per liter of the solvent.

Abstract: A positive electrode is provided and including sulfur and a carbon material, in which the carbon material includes a carbon black having a first specific surface area and a carbon black having a second specific surface area, and the first specific surface area is lower than the second specific surface area.

Abstract: An electrolyte solution for a secondary battery is provided and includes an electrolyte and a solvent, in which the electrolyte contains a sulfonyl group-containing lithium salt and lithium nitrate, a total content of the sulfonyl group-containing lithium salt and the lithium nitrate is 0.8 mol/L or more and 2.0 mol/L or less, and the solvent contains a straight-chain ether and a fluorinated ether.

Abstract: A polymer solid electrolyte for an electrochemical device including a magnesium electrode as a negative electrode, the polymer solid electrolyte including a Mg polymer salt containing Mg2+ and an anionic polymer having an anionic functional group and a coordinating functional group, and the polymer solid electrolyte having Mg ion conductivity.

Abstract: A secondary battery is provided and including a positive electrode, a negative electrode, and an electrolytic solution, where the negative electrode is metal lithium, and the electrolytic solution contains a sulfonyl group-containing lithium salt; a glyme-based solvent; and a specific additive.

Abstract: Provided is an electrochemical device including a negative electrode, a positive electrode, and a separator disposed between the negative electrode and the positive electrode. In the electrochemical device, the negative electrode is an electrode containing magnesium, and is in contact with a fullerene analogue-containing layer containing a fullerene analogue. The electrolytic solution of the electrochemical device includes a solvent and a magnesium salt contained in the solvent.

Abstract: Provided is a magnesium secondary battery including a positive electrode member 23 including at least a positive electrode active material layer 23B, a separator 24 disposed facing the positive electrode member 23, a negative electrode member 25 containing magnesium or a magnesium compound disposed facing the separator 24, and an electrolytic solution containing a magnesium salt. The positive electrode active material layer 23B includes magnesium sulfide having a zinc blende type crystal structure.

Abstract: Provided is a method for fabricating a magnesium-containing electrode by a plating method. In the fabrication process disclosure, a plating solution used in the plating method includes a solvent containing an ether. The solvent includes a first magnesium salt having a disilazide structure represented by a formula (R3Si)2N and a second magnesium salt that does not have a disilazide structure. In the formula, R represents a hydrocarbon group having 1 or more and 10 or less carbon atoms.

Abstract: Provided is an electrolytic solution for an electrochemical device having an electrode including magnesium as a negative electrode. The electrolytic solution includes a solvent having a linear ether and a magnesium salt included in the solvent, and a linear ether solvent further includes a cyclic organic compound having a two-dimensional structure or a three-dimensional structure.

Abstract: An electrolytic solution for an electrochemical device including a magnesium electrode as a negative electrode is provided. The electrolytic solution includes a linear ether solvent. The linear ether solvent includes a first magnesium salt having a disilazide structure represented by a general formula (R3Si)2N where R represents a hydrocarbon radical with one or more and ten or less carbon atoms and a second magnesium salt without the disilazide structure.

Abstract: Provided is an electrolytic solution for an electrochemical device including a magnesium electrode as a negative electrode. The electrolytic solution includes a solvent including a linear ether and a magnesium salt. In the electrolytic solution, the linear ether has two or more ethyleneoxy structural units.

Abstract: An electrolytic solution includes a sulfone and a magnesium salt dissolved in the sulfone, in which the magnesium salt includes magnesium borohydride (Mg(BH4)2).

Abstract: Provided is a magnesium secondary battery including a positive electrode member 23 including at least a positive electrode active material layer 23B, a separator 24 disposed facing the positive electrode member 23, a negative electrode member 25 containing magnesium or a magnesium compound disposed facing the separator 24, and an electrolytic solution containing a magnesium salt. The positive electrode active material layer 23B includes magnesium sulfide having a zinc blende type crystal structure.

Abstract: An electrochemical device including a negative electrode made of a magnesium-based material includes an electrolyte solution consisting of a solvent composed of linear ether, and magnesium salt dissolved in the solvent, in which the magnesium salt is dissolved in 3 moles or more per liter of the solvent.

Abstract: An electrolytic solution for an electrochemical device including a negative electrode is provided. The negative electrode includes a magnesium-based material, and the electrolytic solution includes a 2,2,6,6-tetramethylpiperidine-1-oxyl free radical or a derivative of the 2,2,6,6-tetramethylpiperidine-1-oxyl free radical.

Abstract: A positive electrode active material for multivalent-ion secondary battery is provided. The positive electrode active material includes sulfur, and the sulfur is coated with a polyethylene dioxythiophene-based conductive polymer doped with a sulfonic acid-based compound.

Abstract: An electrolytic solution is an electrolytic solution for an electrochemical device including a negative electrode including a magnesium-based material, and has a moisture content of more than 10 ppm and less than 500 ppm. The electrochemical device including a negative electrode including a magnesium-based material includes an electrolytic solution having a moisture content of more than 10 ppm and less than 500 ppm.

Abstract: An electrode includes at least magnesium, carbon, oxygen, sulfur, and halogen. The electrode also has a surface exhibiting a single peak derived from magnesium in the range of 40 eV to 60 eV.

Abstract: An electrolytic solution includes a sulfone and a magnesium salt dissolved in the sulfone, in which the magnesium salt includes magnesium borohydride (Mg(BH4)2).

Abstract: Provided is a fuel cell that is high in performance capabilities of initial power generation and in volume power density, and produces a stable power. Between fixing plates, first and second cell portions are provided. The first cell portion includes an anode, a cathode, and a proton conductor, and the second cell portion includes an anode, a cathode, and a proton conductor. To a space formed by gas-liquid separation and permeable films, cathode spacers, and an anode spacer, a fuel solution is filled. The gas-liquid separation and permeable films are disposed between the fixing plate and the cathode, and between the fixing plate and the cathode. The cathode spacers are provided around the cathodes, respectively, and the anode spacer is provided between the anodes.