An alkaline battery has a positive electrode mixture containing manganese dioxide and a conductive material filling a tubular positive electrode can that is closed at one end. A negative electrode mixture containing a zinc powder filling on an inner peripheral side of a separator is disposed on an inside of the positive electrode mixture. The negative electrode mixture contains zinc particles with a granularity of 75 μm or less at 25 to 40 mass %. The positive electrode mixture has a plurality of tubular pellets stacked inside the positive electrode can coaxially with the positive electrode can. A sum s of lengths of gaps between the pellets is set at 1 to 14% with respect to a sum d of lengths of the pellets. Thus, a sufficient amount of the electrolyte is held in the gaps and between the pellets in the positive electrode.

A secondary battery includes a partition, a positive electrode, a negative electrode, a positive electrode electrolytic solution, a negative electrode electrolytic solution, and a negative electrode capacity restoring electrode, a positive electrode capacity restoring electrode, or both. The partition is disposed between a positive electrode space and a negative electrode space, and allows an alkali metal ion to pass therethrough. The positive electrode is disposed in the positive electrode space and is an electrode which the alkali metal ion is to be inserted into and extracted from. The negative electrode is disposed in the negative electrode space and is an electrode which the alkali metal ion is to be inserted into and extracted from. The positive electrode electrolytic solution is contained in the positive electrode space and includes an aqueous solvent and the alkali metal ion. The negative electrode electrolytic solution is contained in the negative electrode space and includes an aqueous solvent and the alkali metal ion. The negative electrode capacity restoring electrode is disposed in the positive electrode space. The positive electrode capacity restoring electrode is disposed in the negative electrode space. The negative electrode capacity restoring electrode includes a hydrogen-generating material, an oxygen-reducing material, or both. The positive electrode capacity restoring electrode includes an oxygen-generating material, a hydrogen-oxidizing material, or both.

A secondary battery includes a partition, a positive electrode, a negative electrode, a positive electrode electrolytic solution, a negative electrode electrolytic solution, and a negative electrode capacity restoring electrode, a positive electrode capacity restoring electrode, or both. The partition is disposed between a positive electrode space and a negative electrode space, and allows an alkali metal ion to pass therethrough. The positive electrode is disposed in the positive electrode space and is an electrode which the alkali metal ion is to be inserted into and extracted from. The negative electrode is disposed in the negative electrode space and is an electrode which the alkali metal ion is to be inserted into and extracted from. The positive electrode electrolytic solution is contained in the positive electrode space and includes an aqueous solvent and the alkali metal ion. The negative electrode electrolytic solution is contained in the negative electrode space and includes an aqueous solvent and the alkali metal ion. The negative electrode capacity restoring electrode is disposed in the positive electrode space. The positive electrode capacity restoring electrode is disposed in the negative electrode space. The negative electrode capacity restoring electrode includes a hydrogen-generating material, an oxygen-reducing material, or both. The positive electrode capacity restoring electrode includes an oxygen-generating material, a hydrogen-oxidizing material, or both.

A rechargeable zinc metal battery cell includes a zinc metal anode, a cathode, a porous separator between them, and an electrolyte composition absorbed by the porous separator and in contact with both anode and cathode. The electrolyte composition includes (i) an aqueous solution of zinc chloride at a concentration greater than 15 molal, and (ii) dimethyl carbonate present at a mass ratio between 0.1:1.0 and 1.0:1.0 with respect to water in the aqueous solution. In some examples: the anode includes zinc metal foil stacked on titanium metal foil; the cathode includes vanadium(V) phosphate; the porous separator includes glass fibers and is less than 200 μm thick; or the electrolyte composition includes (i) an aqueous solution of 30 molal zinc chloride, 5 molal lithium chloride, and 10 molal trimethyl ammonium chloride, and (ii) dimethyl carbonate present at a mass ratio of 1.0:1.0 with respect to water in the aqueous solution.

A rechargeable zinc metal battery cell includes a zinc metal anode, a cathode, a porous separator between them, and an electrolyte composition absorbed by the porous separator and in contact with both anode and cathode. The electrolyte composition includes (i) an aqueous solution of zinc chloride at a concentration greater than 15 molal, and (ii) dimethyl carbonate present at a mass ratio between 0.1:1.0 and 1.0:1.0 with respect to water in the aqueous solution. In some examples: the anode includes zinc metal foil stacked on titanium metal foil; the cathode includes vanadium(V) phosphate; the porous separator includes glass fibers and is less than 200 μm thick; or the electrolyte composition includes (i) an aqueous solution of 30 molal zinc chloride, 5 molal lithium chloride, and 10 molal trimethyl ammonium chloride, and (ii) dimethyl carbonate present at a mass ratio of 1.0:1.0 with respect to water in the aqueous solution.

A power storage device includes a plurality of power storage modules laminated, a conductive plate and a sealing member. The conductive plate and the sealing member are provided between the power storage modules adjacent to each other in a laminating direction of the power storage modules. The plurality of power storage modules each have an electrode laminate, an electrolytic solution, and a sealing body. The electrode laminate has electrode exposed portions exposed from the sealing body at one end and the other end in the laminating direction. Between the power storage modules adjacent to each other in the laminating direction, the conductive plate is disposed between the electrode exposed portions opposing each other to be in contact with the electrode exposed portions, and at least a portion between the sealing bodies opposing each other is filled with the sealing member.

A power storage module including: a stacked body that includes electrodes stacked along a first direction; a sealing body that includes a first sealing portion joined to an edge portion of each of the electrodes, forms an inner space between the electrodes adjacent to each other, and seals the inner space; and an electrolytic solution that is stored in the inner space and includes an alkali solution. The electrodes include bipolar electrodes, and a negative terminal electrode. The power storage module includes surplus spaces different from the inner space on a route of an alkali creep phenomenon in which the electrolytic solution reaches the outside from the inner space through the negative terminal electrode.

Battery core packs employing minimum cell-face pressure containment devices and methods are disclosed for minimizing dendrite growth and increasing cycle life of metal and metal-ion battery cells.

Provided is a laminate battery in which a short circuit between a negative electrode active material and a positive electrode due to expansion of the negative electrode active material during discharging is prevented.

A laminate battery includes a battery case that serves as an outer case. The laminate battery includes an inner case within a battery case 11, and the inner case is formed of a positive electrode storage case and a separator. An inside of the inner case serves as a positive electrode storage portion that stores a positive electrode. An outside of the inner case serves as a negative electrode storage portion that stores a negative electrode. The negative electrode uses a particulate negative electrode active material (e.g., zinc or zinc oxide).

The alkaline battery of the present invention includes, as power generation components, a positive electrode containing silver oxide as a positive electrode active material, a negative electrode, a separator, and an alkaline electrolyte solution. At least one of the power generation components contains tellurium or a compound of tellurium. The total content of tellurium element contained in components housed in the battery is 0.4 parts by mass or more with respect to 100 parts by mass of the total amount of silver element in the positive electrode active material. The positive electrode is substantially free of cadmium.