An improved method for manufacturing alkaline (e.g., zinc-manganese dioxide) electrochemical cells and a corresponding anode formulation are disclosed. In particular, zinc and a mixture of gelling agents are employed to better control the manufacturing conditions and to improve the overall performance of the resulting battery. The gelling agents are selected to have differences in resistivity, viscosity and polymerization/cross-linking. The zinc may be of any type, as is known in the art.

According to one embodiment, there is provided a secondary battery including a positive electrode, a negative electrode, and an aqueous electrolyte. The positive electrode includes a positive electrode active material. The negative electrode includes a negative electrode active material and an additive resin containing a hydroxyl group unit and a first unit. The first unit consists of at least one of a butyral unit and an acetal unit. A content ratio of a content of the first unit contained in the additive resin to a content of the hydroxyl group unit contained in the additive resin is in a range of 1.2 to 18.

A secondary battery includes a positive electrode, a negative electrode and an electrolyte containing aqueous electrolyte. The negative electrode is provided with a negative electrode current collector having a compound including aluminum, and a negative electrode active material including titanium on a granule surface of the negative electrode current collector. A ratio of an atomic concentration of aluminum atoms to sum of atomic concentrations of aluminum atoms and titanium atoms on a surface of the negative electrode ({Al atomic concentration/(Al atomic concentration+Ti atomic concentration)}×100) is 3 atm % or more and 30 atm % or less.

Provided is a layered double hydroxide membrane containing a layered double hydroxide represented by the formula: M.sup.2+.sub.1−xM.sup.3+.sub.x(OH).sub.2A.sup.n−.sub.x/n.mH.sub.2O (where M.sup.2+ represents a divalent cation, M.sup.3+ represents a trivalent cation, A.sup.n− represents an n-valent anion, n is an integer of 1 or more, and x is 0.1 to 0.4), the layered double hydroxide membrane having water impermeability. The layered double hydroxide membrane includes a dense layer having water impermeability, and a non-flat surface structure that is rich in voids and/or protrusions and disposed on at least one side of the dense layer. The present invention provides an LDH membrane suitable for use as a solid electrolyte separator for a battery, the LDH membrane including a dense layer having water impermeability, and a specific structure disposed on at least one side of the dense layer and suitable for reducing the interfacial resistance between the LDH membrane and an electrolytic solution.

A lithium-air electrochemical cell is provided. The battery comprises: an anode compartment; a cathode compartment; and a lithium ion conductive membrane separating the anode compartment from the cathode compartment. The anode compartment comprises an anode having lithium, a lithium alloy or a porous material capable of adsorption and release of lithium and a lithium ion electrolyte, while the cathode compartment comprises an air electrode, an ionic liquid capable of supporting the reduction of oxygen and a dissolved concentration of potassium superoxide. A lithium ion concentration in the cathode compartment is low in comparison to the concentration of potassium ion.

The present invention is directed to aqueous and hybrid aqueous electrolytes that comprise a lithium salt. The present invention is also directed to methods of making the electrolytes and methods of using the electrolytes in batteries and other electrochemical technologies.

The present invention relates to a metal-air electrochemical cell with a high energy efficiency mode.

A series of cells for use in an electrochemical device, such as an electrochemical cell or battery, that can operate in a single bulk electrolyte solution shared among the cells. Methods of producing hydrogen or both hydrogen and electricity in appreciable quantifies and in various ratios, and vehicles or other devices and applications powered by electrochemical devices comprising the series.

Methods and systems for electrolyte regeneration are provided, which regenerate a spent alkaline electrolyte (SE) comprising dissolved aluminum hydrates from an aluminum-air battery, by electrolysis, to precipitate aluminum tri-hydroxide (ATH) and form regenerated alkaline electrolyte, and adding a same-cation salt to an anolyte used in the electrolysis to supplant a corresponding electrolyte cation. The regeneration may be carried out continuously and further comprise mixing the SE and the same-cation salt in a salt tank configured to deliver the anolyte, removing the regenerated alkaline electrolyte from a catholyte tank configured to deliver the catholyte, and filtering the ATH from a solution delivered from the salt tank to the anolyte. Optionally, the salt may be a buffering salt, and in some cases chemical reactions may be used to enhance the regeneration by electrolysis.

A method for managing the electric power passing through a cell of a metal-air battery and the associated cell. The cell comprises a negative electrode connected to a positive terminal of the battery, two positive electrodes, and a switching means. The switching means is maintained in a configuration connecting the positive terminal to the first positive electrode when an electric power to pass through the battery corresponds to a first power range, and in a configuration connecting the positive terminal to the second positive electrode when an electric power to pass through the battery corresponds to a second power range, the second power range being associated with higher electric powers than the electric powers of the first range.