The present invention is to provide a separator that is excellent in heat resistance, shutdown function, flame retardancy and handling property. The separator for a nonaqueous secondary battery of the invention is a separator for a nonaqueous secondary battery that has a polyolefin microporous membrane at least one surface of which is laminated with a heat resistant porous layer containing a heat resistant resin, and is characterized by containing an inorganic filler containing a metallic hydroxide that undergoes dehydration reaction at a temperature of 200 to 400° C.

Separator for nonaqueous secondary battery, method for producing the same, and nonaqueous secondary battery

A secondary battery exhibiting a long cycle life and comprising a negative pole activating material made of lithium or zinc is provided, the battery at least having a negative pole made of lithium or zinc serving as the negative pole activating material, an electrolyte (electrolytic solution), a separator, a positive pole made of a positive pole activating material, a collecting electrode and a battery case, wherein at least the surface of the negative pole is covered with a film having a structure which allows ions relating to the battery reactions to pass through. Since growth of dendrite of lithium or zinc at the time of the charge can be prevented, short circuit between the negative pole and the positive pole can be prevented. Therefore, the charge/discharge cycle life can significantly be lengthened. As a result, a lithium secondary battery, a nickel-zinc secondary battery, an air-zinc secondary battery, a bromine-zinc secondary battery and a silver oxide-zinc secondary battery of the long cycle life can be manufactured.

High energy density secondary battery for repeated use

There is disclosed a method for preparing enveloped plates for batteries which comprises introducing an active material composition into the porous envelope of an enveloped plate when the envelope is assembled on the current conducting element of the plate characterized in that the active material composition is introduced into the envelope as an aqueous slurry, which has a degree of sulphation in excess of 50% and a rotating vane viscometer torque value (as herein defined) of not more than 02 lbs ft at 20° C, the said aqueous slurry being introduced into the envelope at a pressure of less than 5 psi until the envelope is filled with the composition, liquids issuing through the walls of the envelope, the pressure then being allowed to rise to a value above 5 psi but not in excess of 70 psi, the pressure there after being released A variety of suitable active material compositions are described together with apparatus for carrying out the method

Electric storage batteries

A separator includes a porous substrate having a plurality of pores; and a porous coating layer formed on at least one surface of the porous substrate and made of a mixture of a binder and a plurality of inorganic particles, wherein the binder includes a crosslinked binder. This separator may improve high temperature cycle performance, discharge characteristics and thermal resistance of an electrochemical device since the separator exhibits improved insolubility and impregnation to electrolyte and improved thermal resistance.

Separator having porous coating layer, method for manufacturing the same and electrochemical device having the same

A lithium ion secondary cell comprising an anode, a cathode, separator, and a nonaqueous electrolyte, wherein the separator is substantially made of a porous sheet, the anode and cathode active materials can be reversibly doped with lithium and dedoped of lithium, the total quantity Qp (mAh) of lithium in the anode and the quantity Qn (mAh) of lithium with which the cathode can be doped is in the relation Qp⊃Qn, the doping of the anode with lithium through lithium species produced on the cathode when the cell is charged starts when the charging is conducted with a charging current Ic (mA) under the condition 0.2Qn<Ic<2Qn and when the quantity of electricity Qc (mAh) is prescribed by 1<Qc/Qn<Qp/Qn and continues until Qc⊃Qp.

Lithium ion secondary cell, separator, cell pack, and charging method

A flexible substrate having a caustic resistant support and at least one membrane comprising a solid polymeric matrix containing a network of interconnected pores and interdispersed inorganic filler particles with a ratio of filler: polymer in the polymeric matrix of between about 1:1 to 5:1, is made by coating at least one side of the support with a filler:coating formulation mixture of inorganic filler particles and a caustic resistant, water insoluble polymer dissolved in an organic solvent, and removing the solvent from the mixture to provide a porous network within the polymeric matrix.

https://ntrs.nasa.gov/api/citations/20080006889/downloads/20080006889.pdf

Heat resistant substrates and battery separators made therefrom

Battery with an iron electrode having a fused coating

A method for preparing iron electrodes is provided which includes mixing particulate iron such as iron powder, iron oxide or iron hydroxide with an organic moldable resin and, preferably, carbon black. The mixture is molded into the desired electrode configuration and the molded electrode is heated in an inert atmosphere to at least 950° C. to carbonize said resin. The electrode may be thereafter activated by use of sulfur compound or the like.

Method for the preparation of iron electrodes

A method of producing active electrode material consists of fusing an elemental sulfur, selenium, or tellurium additive coating onto iron oxide and/or hydrated iron oxide, within a temperature range dependent on the melting point of the additive.

Alois Langer

Papers

Heat resistant substrates and battery separators made therefrom

Battery with an iron electrode having a fused coating

Method for the preparation of iron electrodes

Preparation of battery plates with iron oxides having a fused coating

The Measurement of Radioactivity for Tracer Applications