An ion conducting polymer comprising a modified poly(phenylene oxide) is described. In an exemplary modified polymer, a portion of the monomeric units are attached to a sulfonate-substituted arylamino moiety, such as a monovalent derivative of phenoxy aniline trisulfonate (BOATS), to form a monomeric unit with a charged side chain. Ion conducting polymers can also be prepared with polyether-containing side chains. The ion conducting polymer can be used to prepare ion exchange membranes which can be used in a variety of applications, such as in non-aqueous redox flow batteries and related energy storage systems.

An ion conducting polymer comprising a modified poly(phenylene oxide) is described. In an exemplary modified polymer, a portion of the monomeric units are attached to a sulfonate-substituted arylamino moiety, such as a monovalent derivative of phenoxy aniline trisulfonate (BOATS), to form a monomeric unit with a charged side chain. Ion conducting polymers can also be prepared with polyether-containing side chains. The ion conducting polymer can be used to prepare ion exchange membranes which can be used in a variety of applications, such as in non-aqueous redox flow batteries and related energy storage systems.

A lithium secondary battery includes a positive electrode, a negative electrode, a separator disposed between the positive electrode and the negative electrode, and a nonaqueous electrolyte. The negative electrode is an electrode in which lithium metal deposits during charging and the lithium metal dissolves during discharging. The separator includes a substrate and a functional layer laminated on the substrate. The functional layer includes a first layer including particles of phosphate containing lithium.

A lithium ion battery separator substrate, a preparation method and application thereof are provided. The substrate comprises a support layer and a dense layer, wherein the support layer comprises superfine main fibers, thermoplastic bonded fibers and the nanofibers, and the dense layer comprises nanofibers. The substrate has excellent high-temperature resistance performance, the substrate still has certain strength after being processed at 300° C. for 1 h, and the heat shrinkage rate is less than 5.0%; the substrate has a uniform and compact double-layer structure without a pinhole. Therefore, the requirements concerning heat resistance, porosity and strength of the substrate are met.

A battery separator and a preparation method therefor are provided. The separator includes a lithium ion battery separator substrate and an inorganic coating, the lithium ion battery separator substrate consists of a support layer and a dense layer, and the inorganic coating is coated on the dense layer; the separator has excellent high-temperature resistance, and still has good strength retention and the heat shrinkage rate thereof is no more than 2% after treatment at 300° C. for 1 h, and thus ensures the stability and isolation of the rigid structure of the separator coating at high temperatures; the substrate has a uniform and compact double-layer structure, effectively controls phenomena such as pinholes and filler particles fall-off in a subsequent coating process, and meets the requirements of lithium ion battery separators with respect to heat resistance, porosity and strength, thus having excellent comprehensive performance.

This separator is for electrochemical elements, is to be interposed between a pair of electrodes, and includes para-aramid fibers for holding an electrolytic solution. The separator for electrochemical elements is characterized in that the contained amount of fibers having a fiber diameter of 0.03-0.50 μm is 90 mass % or more, the proportion of the number of fibers having a fiber length not less than 0.05 mm but less than 0.20 mm is 20-30%, and the proportion of the number of fibers having a fiber length not less than 0.20 mm but less than 5.00 mm is 70-80%.

This separator is for electrochemical elements, is to be interposed between a pair of electrodes, and includes para-aramid fibers for holding an electrolytic solution. The separator for electrochemical elements is characterized in that the contained amount of fibers having a fiber diameter of 0.03-0.50 μm is 90 mass % or more, the proportion of the number of fibers having a fiber length not less than 0.05 mm but less than 0.20 mm is 20-30%, and the proportion of the number of fibers having a fiber length not less than 0.20 mm but less than 5.00 mm is 70-80%.

Embodiments described herein relate to electrochemical cells with multiple separators, and methods of producing the same. A method of producing an electrochemical cell can include disposing an anode material onto an anode current collector, disposing a first separator on the anode material, disposing a cathode material onto a cathode current collector, disposing a second separator onto the cathode material, and disposing the first separator on the second separator to form the electrochemical cell. The anode material and/or the cathode material can be a semi-solid electrode material including an active material, a conductive material, and a volume of liquid electrolyte. In some embodiments, less than about 10% by volume of the liquid electrolyte evaporates during the forming of the electrochemical cell. In some embodiments, the method can further include wetting the first separator and/or the second separator with an electrolyte solution prior to coupling the first separator to the second separator.

The present invention provides a nonaqueous electrolyte secondary battery porous layer which improves a long-term battery characteristic of a nonaqueous electrolyte secondary battery. In the nonaqueous electrolyte secondary battery porous layer in accordance with an aspect of the present invention, a standard deviation of whiteness index defined in E313 of the American Standards Test Methods is 0.06 or more and 0.91 or less.

Provided is a binder composition for a non-aqueous secondary battery with which it is possible to form a slurry composition for a non-aqueous secondary battery functional layer having excellent viscosity stability and a functional layer for a non-aqueous secondary battery having excellent pressability. The binder composition for a non-aqueous secondary battery contains water and a particulate polymer formed by a polymer including a block region composed of an aromatic vinyl monomer unit. The particulate polymer has a surface acid content of not less than 0.05 mmol/g and not more than 0.9 mmol/g.