Separators for zinc metal batteries, zinc metal batteries, and methods of fabricating a separator for use in a zinc metal battery are provided. The separator includes a hydrophilic membrane having a first side for facing a negative electrode when arranged in the zinc metal battery and a second side for facing a positive electrode when arranged in the zinc metal battery. The hydrophilic membrane includes a plurality of pores traversing the hydrophilic membrane from the first side to the second side enabling flow of zinc cations between the negative electrode and the positive electrode through the separator. Each of the pores may have a pore size ranging from about 0.1 to 1.3 μm.

An electrochemical apparatus includes a housing, an electrode assembly, and an insulation tape, where at least part of the electrode assembly is located inside the housing, and the insulation tape is located between the housing and the electrode assembly. The insulation tape includes a first surface bonded to the electrode assembly and a second surface bonded to the housing, the first surface includes a first bonding zone, and the second surface includes a second bonding zone, where an area of the first bonding zone is A, an area of the second bonding zone is B, and 0.08≤B/A≤0.965. This can make the insulation tape smaller and lighter and help increase an energy density of the electrochemical apparatus while ensuring reliability of connection between the insulation tape and the housing.

An electrochemical apparatus includes a housing, an electrode assembly, and an insulation tape, where at least part of the electrode assembly is located inside the housing, and the insulation tape is located between the housing and the electrode assembly. The insulation tape includes a first surface bonded to the electrode assembly and a second surface bonded to the housing, the first surface includes a first bonding zone, and the second surface includes a second bonding zone, where an area of the first bonding zone is A, an area of the second bonding zone is B, and 0.08≤B/A≤0.965. This can make the insulation tape smaller and lighter and help increase an energy density of the electrochemical apparatus while ensuring reliability of connection between the insulation tape and the housing.

The present invention provides an air battery using oxygen in air as a cathode active material, the air battery comprising: a cylindrical anode made of a metal; a cathode constituted by a co-continuous body having a three dimensional network structure formed by an integrated plurality of nanostructures having branches; and a separator that is arranged between the cathode and the anode and absorbs an electrolytic solution, wherein: the cathode is arranged inside the anode via the separator; and the anode has an open hole that reaches the separator and constitutes a housing of the air battery.

The present invention provides an air battery using oxygen in air as a cathode active material, the air battery comprising: a cylindrical anode made of a metal; a cathode constituted by a co-continuous body having a three dimensional network structure formed by an integrated plurality of nanostructures having branches; and a separator that is arranged between the cathode and the anode and absorbs an electrolytic solution, wherein: the cathode is arranged inside the anode via the separator; and the anode has an open hole that reaches the separator and constitutes a housing of the air battery.

Provided are separators for use in an electrochemical cell comprising (a) an inorganic oxide and (b) an organic polymer, wherein the inorganic oxide comprises organic substituents. Also provided are electrochemical cells comprising such separators.

A negative electrode comprises a negative electrode collector, a first negative electrode mixture layer, and a second negative electrode mixture layer the ratio of the void fraction (S2) among the graphite particles in the second negative electrode mixture layer to the void fraction (S1) among the graphite particles in the first negative electrode mixture layer, namely S2/S1 is from 1.1 to 2.0: and the ratio of the packing density (D2) of the second negative electrode mixture layer to the packing density (D1) of the first negative electrode mixture layer, namely D2/D1 is from 0.9 to 1.1. A separator has a first surface that is in contact with a positive electrode and a second surface that is in contact with the negative electrode; and the contact angle of the first surface with ethylene carbonate is smaller than the contact angle of the second surface with ethylene carbonate.

This separator for nonaqueous electrolyte secondary batteries contains a polymer compound and a solid electrolyte, and has a pore volume of 0.06 cm.sup.3/gor less.

This separator for nonaqueous electrolyte secondary batteries contains a polymer compound and a solid electrolyte, and has a pore volume of 0.06 cm.sup.3/gor less.

Disclosed herein is a battery separator comprising two porous or microporous layers and a heat-resistant layer between the two porous or microporous layers. The heat-resistant layer may be a ceramic layer or a layer containing a high melt integrity polymer. In some embodiments, the battery separator may further comprise one or more adhesive layers between the two porous or microporous layers. The resulting battery separator may be safer, have more integrity, and/or have shutdown function.