Provided is a binder composition for an all-solid-state secondary battery with which it is possible to form a solid electrolyte-containing layer that can cause an all-solid-state secondary battery to display excellent high-temperature storage characteristics. The binder composition for an all-solid-state secondary battery contains an acrylic polymer and not less than 500 mass ppm and not more than 5,000 mass ppm of a coagulant relative to the acrylic polymer.

A positive electrode for lithium ion secondary batteries includes a collector and a positive electrode active material layer formed on at least one surface of the collector. The positive electrode active material layer contains a lithium-containing metal oxide having a unit cell represented by the following formula and a conductive material and has voids with a volume of 0.82×10.sup.−3 cm.sup.3/cm.sup.2 to 7.87×10.sup.−3 cm.sup.3/cm.sup.2 per unit area of the collector:
LiFe.sub.1-xZr.sub.xP.sub.1-ySi.sub.yO.sub.4  (1)
where 0<x<1 and 0<y<1. The unit cell has lattice constants satisfying 10.326≦a≦10.335, 6.006≦b≦6.012, and 4.685≦c≦4.714. The sum of the volume of the lithium-containing metal oxide and the volume of the conductive material is 1.61×10.sup.−3 cm.sup.3/cm.sup.2 to 6.46×10.sup.−3 cm.sup.3/cm.sup.2 per unit area of the collector.

A positive electrode for lithium ion secondary batteries includes a collector and a positive electrode active material layer formed on at least one surface of the collector. The positive electrode active material layer contains a lithium-containing metal oxide having a unit cell represented by the following formula and a conductive material and has voids with a volume of 0.82×10.sup.−3 cm.sup.3/cm.sup.2 to 7.87×10.sup.−3 cm.sup.3/cm.sup.2 per unit area of the collector:
LiFe.sub.1-xZr.sub.xP.sub.1-ySi.sub.yO.sub.4  (1)
where 0<x<1 and 0<y<1. The unit cell has lattice constants satisfying 10.326≦a≦10.335, 6.006≦b≦6.012, and 4.685≦c≦4.714. The sum of the volume of the lithium-containing metal oxide and the volume of the conductive material is 1.61×10.sup.−3 cm.sup.3/cm.sup.2 to 6.46×10.sup.−3 cm.sup.3/cm.sup.2 per unit area of the collector.

Provided is a secondary battery including a positive electrode, a negative electrode, an alkaline electrolytic solution, a separator structure exhibiting water impermeability and separating the positive electrode from the negative electrode, and a container accommodating at least the negative electrode and the alkaline electrolytic solution. The separator structure includes a porous substrate-supported ceramic separator, and a reinforcement having a lattice structure having openings and reinforcing the periphery and/or at least one surface of the porous substrate-supported ceramic separator. The porous substrate-supported ceramic separator includes a ceramic separator composed of an inorganic solid electrolyte having hydroxide ion conductivity in the form of a membrane or layer densified enough to have water impermeability, and a porous substrate disposed on at least one surface of the separator. The battery includes a porous substrate-supported ceramic separator with hydroxide ion conductivity having a high strength meeting an increase in the area of the separator.

Provided is a secondary battery including a positive electrode, a negative electrode, an alkaline electrolytic solution, a separator structure exhibiting water impermeability and separating the positive electrode from the negative electrode, and a container accommodating at least the negative electrode and the alkaline electrolytic solution. The separator structure includes a porous substrate-supported ceramic separator, and a reinforcement having a lattice structure having openings and reinforcing the periphery and/or at least one surface of the porous substrate-supported ceramic separator. The porous substrate-supported ceramic separator includes a ceramic separator composed of an inorganic solid electrolyte having hydroxide ion conductivity in the form of a membrane or layer densified enough to have water impermeability, and a porous substrate disposed on at least one surface of the separator. The battery includes a porous substrate-supported ceramic separator with hydroxide ion conductivity having a high strength meeting an increase in the area of the separator.

A storage structure of an electrical metal-air energy storage cell is provided including an active storage material and an inert material, wherein particles of the inert material have an aspect ratio of less than 0.7, and wherein subregions of the inert particles are incorporated in a grain volume of grains of the active storage material.

A storage structure of an electrical metal-air energy storage cell is provided including an active storage material and an inert material, wherein particles of the inert material have an aspect ratio of less than 0.7, and wherein subregions of the inert particles are incorporated in a grain volume of grains of the active storage material.

A device for producing electrolyte flow in a flow-assisted battery comprises a flow assisted battery, a powering device located on a dry side of a battery housing, and an impeller assembly located on a wet side of the battery housing. The flow assisted battery comprises a battery housing, an anode, a cathode and an electrolyte solution, where the anode, the cathode and the electrolyte solution are disposed within the battery housing. The impeller assembly comprises: a shaft, an impeller, and one or more interior magnets, and the powering device and the impeller assembly are magnetically coupled through the battery housing.

A device for producing electrolyte flow in a flow-assisted battery comprises a flow assisted battery, a powering device located on a dry side of a battery housing, and an impeller assembly located on a wet side of the battery housing. The flow assisted battery comprises a battery housing, an anode, a cathode and an electrolyte solution, where the anode, the cathode and the electrolyte solution are disposed within the battery housing. The impeller assembly comprises: a shaft, an impeller, and one or more interior magnets, and the powering device and the impeller assembly are magnetically coupled through the battery housing.

A negative electrode active material for a lithium ion secondary battery includes a network structure formed by at least some of iron oxide particles being linked to each other.