An object is especially to provide a metal-air battery that ensures a high output and continuance of the output over a long period of time as compared with a conventional one. A metal-air battery in the present invention includes a case, air electrodes disposed on both sides of the case, and a plurality of metal electrodes disposed inwardly separately from the air electrodes. The metal electrodes are opposed to one another via a space (S). The metal-air battery of the present invention can inhibit the reaction product from depositing between the air electrode and the metal electrode. A degree of freedom of a distance between the air electrode and the metal electrode is high. As described above, the high output and the continuance of the output over a long period of time are ensured.

A method for renovation of a consumed anode in a metal-air cell without dismantling the cell according to embodiments of the present invention comprising circulating electrolyte through the cell to evacuate used slurry from the cell, circulating electrolyte with fresh slurry into the cell and allowing sedimentation of the fresh slurry inside the cell to form an anode and compacting the slurry to reduce the gaps between its particles. A meta-air cell enabling renovation of a consumed anode without dismantling the cell defining first outer face of the cell, air cathode layer adjacent the porous wall, separator wall disposed on the inner face of the air cathode layer, cell space volume to contain electrolyte and metal granules slurry, current collector layer to form an anode, made of current conductive material disposed in the space and flexible wall defining a second outer face of the cell wherein the flexible wall is adapted to be pushed towards inside of the cell subject to pressure applied to its outer face, thereby to reduce the volume of the space.

A metal air battery according to one embodiment of the present invention includes a pair of air cathodes having planar shapes respectively, which have a first bonding portion bonded along edges of the pair of the air cathodes and are disposed to face each other; a pair of separators disposed in contact with the pair of the air cathodes; an anode having a planar shape disposed between the pair of the separators and electrically insulated from the pair of the air cathodes; and then a zinc gel disposed in an accommodation space between the pair of the air cathodes. The accommodation space is a space formed by elastic deformation of the pair of the air cathodes.

Provided is a battery including a layered double hydroxide. The battery includes a positive electrode, a negative electrode, an electrolytic solution being an aqueous alkali metal hydroxide solution, and a layered double hydroxide having a fundamental composition represented by the formula: M.sup.2+.sub.1xM.sup.3+.sub.x(OH).sub.2A.sup.n.sub.x/n.Math.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, x is 0.1 to 0.4, and m is any real number, the layered double hydroxide being in contact with the electrolytic solution, wherein a metal compound containing a metal corresponding to M.sup.2+ and/or M.sup.3+ is dissolved in the electrolytic solution such that erosion of the layered double hydroxide by the electrolytic solution is suppressed. The present invention provides a highly reliable battery such that the degradation of a layered double hydroxide (LDH) contained in the battery can be significantly reduced.

It is provided a secondary zinc-air battery comprising at least two secondary zinc-air electrochemical cells, each cell comprising an air cathode that is a bifunctional air electrode (BAE); a zinc-containing anode; a free electrolyte contained in a reservoir; and a first and a second separators; wherein the zinc-containing anode is disposed between the BAE and the free electrolyte, and is separated from the BAE by the first separator and separated from the free electrolyte by the second separator, and wherein the at least two cells are assembled together in such a way that a unique electrolyte reservoir containing the free electrolyte is placed between at least two zinc anodes and thus is shared by the at least two secondary zinc-air electrochemical cells.

An improved seawater electrochemical cell with a consumable anode and an oxygen reducing cathode is provided with a reduced distance between anode and cathode surfaces. The reduced distance does not impede the ingress of oxygen dissolved in water and the egress of reaction products from the cell and causes an increase in the volumetric energy and power density of such dissolved oxygen seawater cells.

A lithium oxygen or air battery (80) is disclosed having two halves (81) that are joined together along their edges. Each battery half (81) has a carbon cloth or mesh cathode current collector (82), a cathode (83), a cathode terminal (84), an anode (85), an anode current collector, anode terminal (88) and a solid separator (87). The cathode includes randomly distributed carbon fibers throughout. The manufacturing of the cathode includes embedding a carbon cloth between two layers of cathode material in a slurry state

A method for renovation of a consumed anode in a metal-air cell without dismantling the cell comprises circulating electrolyte through the cell to evacuate used slurry from the cell, circulating electrolyte with fresh slurry into the cell and allowing sedimentation of the fresh slurry inside the cell to form an anode and compacting the slurry to reduce the gaps between its particles. A meta-air cell enabling renovation of a consumed anode without dismantling the cell defining first outer face of the cell, air cathode layer adjacent the porous wall, separator wall disposed on the inner face of the air cathode layer, cell space volume to contain electrolyte and metal granules slurry, current collector layer to form an anode, made of current conductive material disposed in the space and flexible wall defining a second outer face of the cell wherein the flexible wall is adapted to be pushed towards inside of the cell subject to pressure applied to its outer face, thereby to reduce the volume of the space.

A lithium oxygen or air battery (80) is disclosed having two halves (81) that are joined together along their edges. Each battery half (81) has a carbon cloth or mesh cathode current collector (82), a cathode (83), a cathode terminal (84), an anode (85), an anode current collector, anode terminal (88) and a solid separator (87). The cathode includes randomly distributed carbon fibers throughout. The manufacturing of the cathode includes embedding a carbon cloth between two layers of cathode material in a slurry state.

The present disclosure provides a power storage device, a power storage control device, and a power storage control method for suppressing a burden imposed on a cell when voltages of cells are equalized. A power storage device includes: a plurality of cells which are connected in series; a series resonance circuit configured to include a reactor and a capacitor; and a power storage control device configured to control a connection state of the cells and the series resonance circuit. The power storage control device causes energy to be transferred between equal numbers of cells via the series resonance circuit.