In a non-aqueous electrolyte secondary battery according to one exemplary embodiment, a separator includes a substrate, a first filler layer containing phosphate particles and formed on at least one surface of the substrate, and a second filler layer containing inorganic particles and formed on a surface of the first filler layer on the side of the at least one surface of the substrate. The phosphate particles have a BET specific surface area of 5 m.sup.2/g or more and 100 m.sup.2/g or less.

According to one embodiment, provided is a secondary battery including a negative electrode containing a titanium-containing oxide, a positive electrode, a separator between the negative electrode and the positive electrode, a first aqueous electrolyte, a second aqueous electrolyte, and a third aqueous electrolyte. The first aqueous electrolyte is held in the negative electrode and contains 0.001% by mass to 0.5% by mass of zinc ions. The second aqueous electrolyte is held in the separator and contains 1% by mass to 5% by mass of a first compound that includes a hydrophobic portion and a hydrophilic portion. The third aqueous electrolyte is held in the positive electrode.

Separators, materials, and processes for producing electrochemical cells, for example, lithium (Li) metal batteries, and electrochemical cells produced therefrom. Such a separator includes a permeable membrane formed of a first polymer that is hydrophobic and has oppositely-disposed first and second surfaces, a second polymer that is hydrophilic and is incorporated into the first surface of the first polymer so that the first surface of the first polymer is a hydrophilic surface, and a conductive composite layer on the hydrophilic surface. The composite layer contains at least one layer of a carbonaceous material and an aqueous binder that binds the carbonaceous material together and to the hydrophilic.

A thin separator for electrochemical elements, which has achieved chemical stability, while maintaining a good balance among short-circuit resistance, resistivity, electrolyte solution impregnability and electrolyte solution retainability of the separator. A separator for electrochemical elements, which is interposed between a pair of electrodes so as to separate the electrodes from each other, and which holds an electrolyte solution. This separator for electrochemical elements is composed of beaten cellulose fibers and thermoplastic synthetic fibers, and has a thickness of 5.0-30.0 μm and a density of 0.50-0.75 g/cm.sup.3; and the thickness X (μm) and the air resistance Y (second/100 ml) of this separator for electrochemical elements satisfy formula 1:
Y≥0.01X.sup.2−0.6X+11.5.

This nonaqueous electrolyte secondary battery is provided with an electrode body that is obtained by alternately laminating a plurality of positive electrodes and a plurality of negative electrodes, with separators being interposed therebetween. Each separator is configured of a porous resin substrate and a porous heat-resistant layer that is formed on one surface of the resin substrate and has a larger surface roughness than the resin substrate. The electrode body comprises: bonding particles that bond a negative electrode and a heat-resistant layer with each other; and bonding particles that bond a positive electrode and a resin substrate with each other. The mass of the bonding particles per unit area in a first interface between the negative electrode and the heat-resistant layer is larger than the mass of the bonding particles per unit area in a second interface between the positive electrode and the resin substrate.

The present disclosure relates to a two-dimensional Ni-organic framework/rGO composite including: a two-dimensional electroconductive Ni-organic framework in which Ni and an organic ligand containing a substituted or unsubstituted C.sub.6-C.sub.30 arylhexamine are repeatedly bonded in a branched form; and reduced graphene oxide (rGO). Thus, when a composite of reduced graphene oxide (rGO) and a two-dimensional Ni-MOF is prepared and used as an energy storage electrode material, the two-dimensional Ni-organic framework/rGO composite of the present disclosure can exhibit higher discharge capacity per weight due to the synergistic effect of rGO and Ni-MOF as compared to when Ni-MOF is used alone, and the composite can be used to manufacture a thin-film type electrode, which can be used as a next-generation energy storage electrode having high mechanical bending strength and energy density per volume.

A method for manufacturing a separator for an electrochemical device which uses polyvinyl pyrrolidone (PVP) as a dispersing agent, and provides high dispersibility of particles and prevents aggregation of particles, even when inorganic particles having a small particle diameter is used in slurry for forming a porous coating layer. Therefore, the inorganic particles are distributed homogeneously in the porous coating layer of a finished separator. In addition, since PVP is used with a fluorinated binder resin, the separator shows improved peel strength and adhesion to an electrode. Further, a non-solvent ingredient for the fluorinated binder resin is used as a solvent for PVP, and a non-solvent ingredient for PVP is used as a solvent for the fluorinated binder resin.

An electrode assembly includes first and second electrode plate having opposite polarities, and a separator separating the first and second electrode plates. The first electrode plate includes two first stack sections and a bend section connecting the first stack sections and including a guide portion configured to guide the bend section to bend during production. The second electrode plate includes a second stack section disposed between the first stack sections. The separator includes two separation sections each disposed between the second stack section and one first stack section. Thickness Da of each first stack section, thickness Dc of the second stack section, and thickness Ds of each separation section in a stacking direction of the first stack sections, and a dimension w of the guide portion in a bending direction of the bend section satisfy: Dc+2Ds≤w≤2×(Dc+2Ds+Da).

A flame-resistant polymer composite separator for use in a lithium battery, wherein the polymer composite separator comprises (a) a binder or matrix polymer; (b) 0.1% to 50% by weight of a lithium salt dispersed in the polymer; and (c) from 30% to 99% by weight of particles or fibers of an inorganic material or polymer fibers that are dispersed in or bonded by the polymer, wherein the polymer is a polymerization or crosslinking product of a reactive additive comprising (i) a first liquid solvent that is polymerizable, (ii) an initiator or crosslinking agent, and (iii) the lithium salt and wherein the polymer composite separator has a thickness from 50 nm to 100 μm and a lithium ion conductivity from 10.sup.−8 S/cm to 5×10.sup.−2 S/cm at room temperature.

An electrochemical cell comprising a first electrode separated from a second electrode by a shutdown separator. The first electrode can comprise a first current collector substrate having a first active material composite layered thereon. The second electrode can comprise a second current collector substrate parallel to the first current collector substrate. The second current collector substrate can have a second active material composite layered thereon. The first current collector substrate can have a first current collector tab extending from the first current collector substrate at a position along an axis parallel to a plane defined by the first current collector substrate. The second current collector substrate can have a second current collector tab extending from the second current collector substrate at a same position along the axis as the first current collector tab. A battery including the electrochemical cell and methods for manufacturing the battery are also described.