Abstract: An object of the present invention is to provide a polyimide binder which can be prepared under lower temperature conditions. The binder composition for a secondary battery of the present invention is characterized in comprising a polyamic acid and an aromatic compound comprising an electron donating group and an organic acid group.

Abstract: An electrode-separator assembly is provided that can drastically facilitate assembly of a LDH separator-equipped nickel-zinc battery without the work, structure, or components for the complete separation of a positive-electrode chamber from a negative-electrode chamber. The electrode-separator assembly includes a positive-electrode plate, a negative-electrode plate, a layered double hydroxide (LDH) separator for separation of the positive-electrode plate from the negative-electrode plate, and a resin frame having an opening to which the LDH separator and the positive-electrode plate are fitted or joined. The positive-electrode plate has a smaller face than the negative-electrode plate. The negative-electrode plate has a clearance area that does not overlap with the positive-electrode plate over a predetermined width from the outer peripheral edge of the negative-electrode plate.

Abstract: According to the present invention, a positive electrode is provided with: a positive electrode current collector which contains aluminum; a positive electrode mixture layer which contains a positive electrode active material that is configured of a lithium transition metal oxide; and an intermediate layer which is arranged between the positive electrode current collector and the positive electrode mixture layer. The intermediate layer contains inorganic compound particles, a conductive material and a binder; the circularity is from 5% to 75% (inclusive); the void fraction of the intermediate layer is from 30% to 69% (inclusive); and the average circularity of the inorganic compound particles is from 5% to 75% (inclusive).

Abstract: Provided are compositions, systems, and methods of making and using pre-lithiated cathodes for use in lithium ion secondary cells as the means of supplying extra lithium to the cell. The chemically or electrochemically pre-lithiated cathodes include cathode active material that is pre-lithiated prior to assembly into an electrochemical cell. The process of producing pre-lithiated cathodes includes contacting a cathode active material to an electrolyte, the electrolyte further contacting a counter electrode lithium source and applying an electric potential or current to the cathode active material and the lithium source thereby pre-lithiating the cathode active material with lithium. An electrochemical cell is also provided including the pre-lithiated cathode, an anode, a separator and an electrolyte.

Abstract: The present invention provides a linear porous lithium titanate material, preparation and product thereof. The material comprises a lithium titanate material having a crystal phase which is a spinel type, wherein the lithium titanate material has a linear structure having an aspect ratio of greater than 10, and the linear lithium titanate material has a porous structure; wherein the linear porous lithium titanate material has a structure composed of a plurality of particles having an oriented growth direction. The material has a long-axis structure which facilitates the effective migration of electrons, a porous structure which facilitates the rapid intercalation and deintercalation process of lithium ions, sodium ions or potassium ions, and a large specific surface area which facilitates the contact area between the electrolyte solution and the electrodes and reduces the current density, thus is excellent in a rapid charge-discharge performance of the battery.

Abstract: A resin composition for a non-aqueous electrolyte secondary battery that includes a vinylidene fluoride copolymer having a constituent unit derived from vinylidene fluoride and a constituent unit derived from a fluorine-containing alkyl vinyl compound. A melting point, measured in accordance with ASTM D3418, of the vinylidene fluoride copolymer is from 105° C. to 125° C., and a mass fraction Wa of the constituent unit derived from the fluorine-containing alkyl vinyl compound in the vinylidene fluoride copolymer, a degree of crystallinity DC of the vinylidene fluoride copolymer, and a degree of amorphicity DA of the vinylidene fluoride copolymer satisfy Equation (1) below: 4.7?Wa×(DC/DA)?14??(1).

Abstract: A cell structure for a secondary battery includes an electrode assembly including a plurality of electrodes, a plurality of electrode tabs extending from the electrodes to an outside of the electrode assembly, and a plurality of lead tabs electrically connected to the electrode tabs and contacting the electrode assembly. In the cell structure, a part of each of the lead tabs is folded, and the electrode tabs are inserted into the folded part of each of the lead tabs.

Abstract: Thermoresponsive composite switch (TRCS) membranes for ion batteries include a porous scaffolding providing ion channels and a thermoresponsive polymer coating. Boron nitride nanotube (BNNT)/polymer composite TRCS membrane embodiments are preferable due to unique BNNT properties. A BNNT scaffold coated with one or more polymers may form a composite separator with tunable porosity (porosity level and pore size distribution), composition, wettability, and superior electronic isolation, oxidative/reduction resistance, and mechanical strength. The BNNT/polymer composite TRCS membrane optimizes the performance of ion batteries with tunable separator thicknesses that may be under 5 ???. Nano-scale porosity with thin separator thicknesses improves the charge density of the battery. Nano-scale architecture allows for reversible localized switching on the nano scale, in proximity to thermally stressed ion substrates.

Abstract: The present invention relates to a separator for a lithium secondary battery, which includes a porous substrate, and a lithium metal layer formed on one side of the porous substrate, wherein the lithium metal layer is formed on an outer circumferential surface of the porous substrate and has a window frame shape with an empty interior, and a lithium secondary battery including the same.

Abstract: A polymer derived ceramic precursor is selected and mixed with a contaminated recycled electrode material or materials. The mixture is pyrolyzed to form a ceramic or ceramic-carbon composite, reduced to a powder and formed into an electrode of a battery, such as a lithium ion battery.

Abstract: A process for recovering a nickel cobalt manganese hydroxide from recycled lithium-ion battery (LIB) material such as black mass, black powder, filter cake, or the like. The recycled LIB material is mixed with water and either sulfuric acid or hydrochloric acid at a pH less than 2. Cobalt, nickel, and manganese oxides from the recycled lithium-ion battery material dissolve into the acidic water with the reductive assistance of gaseous sulfur dioxide. Anode carbon is filtered from the acidic water, leaving the dissolved cobalt, nickel, and manganese oxides in a filtrate. The filtrate is mixed with aqueous sodium hydroxide at a pH greater than 8. Nickel cobalt manganese hydroxide precipitates from the filtrate. The nickel cobalt manganese hydroxide is filtered from the filtrate and dried. The filtrate may be treated ammonium fluoride or ammonium bifluoride to precipitate lithium fluoride from the filtrate.

Abstract: The present application provide a secondary battery and related battery module, battery pack and apparatus. The secondary battery includes a positive electrode plate, a negative electrode plate, a separator and an electrolyte, wherein the secondary battery includes a positive active material selected from one or more of layered lithium nickel cobalt manganese oxide and layered lithium nickel cobalt aluminum oxide, and a negative active material including graphite and silicon-oxygen compound; the delithiation capacity A of the negative electrode film in the voltage range of 0.005V to the delithiation platform voltage and the delithiation capacity B of the negative electrode film in the voltage range of the delithiation platform voltage to 1.2V satisfy: 1A/B2; and when the secondary battery is discharged to a voltage of 2.5V, the voltage U of the negative electrode plate relative to a lithium metal reference electrode satisfies: 0.5VU0.7V.

Abstract: A rechargeable battery cell includes a cathode, an anode, an electrolyte, and a sensor that is arranged in the rechargeable battery cell. The sensor has at least two sensor electrodes and is accommodated in the rechargeable battery cell without a sheathing at least in sections. Moreover, the at least two sensor electrodes are operated in an electrical potential range that protects the sensor and/or the sensor electrodes against corrosion by the electrolyte. A method for producing and operating a rechargeable battery cell of this kind is also provided.

Abstract: The invention is directed to a barrier layer for corrosion protection in electrochemical devices, e.g. carbon based gas diffusion layers (GDLs) in electrochemical devices, comprising electrically conductive ceramic material and a non-ionomeric polymer binder. The electrically conductive ceramic material has an electrical conductivity of >0.1 S/cm, preferably >1 S/cm in air atmosphere (as detected by the powder method) and is selected from the group of precious metal and/or base metal containing oxides, carbides, nitrides, borides and mixtures and combinations thereof. Membrane-electrode assemblies (MEAs), catalyst-coated membranes (CCMs), gas diffusion electrodes (GDEs) and gas diffusion layers (GDLs) comprising the barrier layer of the invention show improved corrosion resistance, preferably against carbon corrosion; particularly in start-up/shut-down cycles and fuel starvation situations of PEM fuel cells.

Abstract: A method for detecting leakage of a reducing fluid throughout an electrolyte membrane of an electrochemical cell is provided. The method includes the following consecutive steps: supplying the cell with anode and cathode streams; brisk and controlled variation of at least one of the following parameters: the pressure of the anode stream in the anode channel, the pressure of the cathode stream in the cathode channel, the flow rate of the anode stream into the anode channel, the flow rate of the cathode stream into the cathode channel, and the strength of the current exchanged between the two sides of the membrane; measurement of a first reducing fluid concentration in a first stream, including the cathode stream leaving the cathode channel; and deducing the presence or absence of leakage on the basis of the variation in the first measured concentration of reducing fluid over time. A corresponding fuel cell system is also provided.

Abstract: A method for manufacturing a pre-lithiated polyphenylene sulfide with a high solid solubility of lithium includes; placing NMP, Li2S, and LiOH into a high-pressure reactor to obtain a mixture, and heating the mixture to 150-250° C. for a high-temperature dehydration for 2-5 h, and then cooling the mixture to 100° C. and adding p-DCB to the mixture for a reaction at 150-250° C. for 80-200 min; dropwise adding hydrochloric acid in an identical amount as that of the LiOH neutralize LiOH, and removing NMP and H2O by evaporation or sublimation, to obtain a dry mixed powder; and to the dry mixed powder, adding a chloride ion complexing agent to obtain a mixture, stirring the mixture to homogeneity, and placing the mixture in a sealed reactor for a reaction at 150-250° C. for 80-200 min, followed by washing and drying, to obtain the pre-lithiated polyphenylene sulfide.

Abstract: A rechargeable battery is provided. The rechargeable battery includes a positive electrode substrate layer; a positive electrode active material layer disposed adjacent to the positive electrode substrate layer; a negative electrode substrate layer; a negative electrode active material layer disposed adjacent to the negative electrode substrate layer; a separator disposed between the positive electrode active material layer and the negative electrode active material layer; and a shape variable layer disposed between the positive electrode substrate and the positive electrode active material layer or between the negative electrode substrate and the negative electrode active material layer.

Abstract: A nonaqueous electrolyte secondary battery includes a flat wound electrode body that includes a positive electrode sheet, a negative electrode sheet, and a separator sheet, and a nonaqueous electrolyte. The wound electrode body includes a filling layer containing a thermal polymerization product of a resin having electrolyte solution swellability between the negative electrode sheet and the separator sheet.

Abstract: The present invention provides an electrochemical unit, a manufacturing method for the same and a use of the same as a component of batteries, and an electrochemical device including the same. The electrochemical unit includes a mixture layer and a transition metal oxide layer. The mixture layer includes an oxide made of a first transition metal, an oxide made of a second transition metal, and a first alkali metal. The transition metal oxide layer is disposed on one side of the mixture layer, where the transition metal oxide layer includes a third transition metal oxide.

Abstract: The present embodiments provide a metal lithium strip, a prelithiated electrode plate, and a prelithiation process. The metal lithium strip comprises a lithium substrate and a metal element doped in the lithium substrate, the metal element comprises at least two of magnesium, boron, aluminum, silicon, indium, zinc, silver, calcium, manganese and sodium; and the metal lithium strip has a strength a, a width w, and a thickness h, satisfying: ?2-(w/105h)2>0. In the present application, the strength of the lithium strip is adjusted by the doping of the metal elements; meanwhile, the strength of the adjusted lithium strip is matched with its width and thickness ensuring that in the process of rolling the metal lithium strip to a reasonable thickness, the phenomenon of edge cracking of the lithium strip is avoided, lithium metal resources and production costs can be saved, a uniform pre-lithiation effect for electrode plate can also be achieved.