There is provided a separator for an electricity storage device, comprising a polyolefin resin microporous membrane and an inorganic porous layer arranged on at least one surface of the polyolefin resin microporous membrane, wherein the inorganic porous layer has at least one selected from the group consisting of (i) covalent bonding between inorganic particles, (ii) covalent bonding between resin binders, and (iii) covalent bonding between an inorganic particle and a resin binder, and the polyolefin resin microporous membrane comprises a silane graft-modified polyolefin, and a silane crosslinking reaction in the silane graft-modified polyolefin is initiated when the separator for an electricity storage device is brought into contact with an electrolyte solution.

There is provided a separator for an electricity storage device, comprising a polyolefin resin microporous membrane and an inorganic porous layer arranged on at least one surface of the polyolefin resin microporous membrane, wherein the inorganic porous layer has at least one selected from the group consisting of (i) covalent bonding between inorganic particles, (ii) covalent bonding between resin binders, and (iii) covalent bonding between an inorganic particle and a resin binder, and the polyolefin resin microporous membrane comprises a silane graft-modified polyolefin, and a silane crosslinking reaction in the silane graft-modified polyolefin is initiated when the separator for an electricity storage device is brought into contact with an electrolyte solution.

Provided is a lithium secondary battery comprising: a positive electrode including a positive electrode active material; a negative electrode including a negative electrode active material; and a first functional layer between the positive electrode and the negative electrode, wherein the first functional layer includes plate-like polyolefin particles having an average diameter of 1 μm to 8 μm, and the positive electrode includes a positive electrode active material layer including a positive electrode active material and a flame retardant, or has a stacked structure including a positive electrode active material layer and a second functional layer including a flame retardant.

Provided is a lithium secondary battery comprising: a positive electrode including a positive electrode active material; a negative electrode including a negative electrode active material; and a first functional layer between the positive electrode and the negative electrode, wherein the first functional layer includes plate-like polyolefin particles having an average diameter of 1 μm to 8 μm, and the positive electrode includes a positive electrode active material layer including a positive electrode active material and a flame retardant, or has a stacked structure including a positive electrode active material layer and a second functional layer including a flame retardant.

The present application provides an organic-inorganic hybrid complex which can be used in a coating of a separator for a secondary battery, wherein the organic-inorganic hybrid complex is formed from basic units represented by formula (I) being periodically assembled in at least one spatial direction: [L.sub.x-i□i][M.sub.aC.sub.b].A.sub.z (I), wherein a defect percentage expressed in i/x*100% is 1% to 30%. The present application further provides a coating composition comprising the organic-inorganic hybrid complex, a coating formed from the coating composition, a separator comprising the coating for a secondary battery, a secondary battery comprising the separator, a battery module, a battery pack and a device. By applying the organic-inorganic hybrid complex of the present application in a coating, the electrolyte infiltration of a separator for a secondary battery is improved while increasing the electrolyte retention rate, thereby improving the rate capability and cycling life of the secondary battery.

A separator for a lithium-sulfur battery and a lithium-sulfur battery including the same are provided. More particularly, a separator for a lithium-sulfur battery including a porous substrate; and a coating layer present on at least one surface of the porous substrate, wherein the coating layer includes a polymer including a main chain, with a functional group having a non-covalent electron pair present in the main chain and a side chain with an aromatic hydrocarbon group present in the side chain.

A resin granule mass including a plurality of resin granules, and a proportion of resin granules to which a magnetic foreign matter of 50 μm or greater is adhered in the plurality of resin granules is 30% or less.

There is provided an LDH separator including a porous substrate and a layered double hydroxide (LDH)-like compound that fills up pores of the porous substrate. The LDH-like compound is a hydroxide and/or an oxide with a layered crystal structure, containing (i) Ti, Y, and optionally Al and/or Mg, and (ii) at least one additive element M selected from the group consisting of In, Bi, Ca, Sr, and Ba.

A method for enhancing battery cycle performance. The method is applied in a battery and includes: charging, at a first stage, the battery at a first-stage current until reaching a first-stage voltage; and charging, at a second stage, the battery at a second-stage current until reaching a second-stage voltage. The second-stage voltage is greater than the first-stage voltage, and the second-stage current is less than the first-stage current. The battery includes an electrolytic solution containing an organic solvent. The organic solvent includes a chain carboxylate compound. A weight percent of the chain carboxylate compound in the organic solvent is 10% to 70%. This application further provides an electronic device. The method can enhance high-temperature cycle and storage performance of the battery.

The present disclosure provides a porous electrode for a flow-through rechargeable electrochemical cell including a high-porosity metal current collector, an active material surrounding the metal current collector, and a self-supporting synthetic membrane material surrounding the active material. The present disclosure further includes a flow-through rechargeable battery including multiple electrochemical cells, a closed loop, and a pump.