43results about "Gel electrodes" patented technology

The use of carboxymethyl cellulose in an interlayer of an electrode structure for improving the thermal stability of the electrode structure is described. The electrode structure is used in a battery cell and comprises a current collector layer having a current collector surface, a polymer gel electrode layer having an electrode surface facing the current collector surface, and the interlayer arranged between the current collector surface and the electrode surface. The interlayer comprises an electrically conductive material and a binder, wherein the binder comprises carboxymethyl cellulose.

To provide a carbon composition suitable for use in an environment including an electrochemical reaction.SOLUTION: A carbon composition includes: a carbon material having a porous structure; and a silicon-based material at least partially present in the porous structure of the carbon material, wherein the carbon composition contains more than about 10 wt.% of the silicon-based material, has a porosity between about 10% and about 80%, has a pore size at a maximum peak in a distribution of about 100 nm or less, and has a silicon utilization rate of at least about 20%.SELECTED DRAWING: Figure 3

The present invention relates to a silicon-nanographite aerogel for use as an anode in a battery, such as a lithium ion battery, comprising a matrix of nanographite flakes consisting of a mixture of graphene, multilayer graphene and graphite nanoplatelets, and silicon nanoparticles having a diameter between 1 nm and 100 nm, whereby the aerogel has a three-dimensional structure with pores between the flakes, whereby the specific surface area accommodates a volume expansion of the silicon nanoparticles of at least 400% during lithiation, and wherein the surfaces of the nanographite flakes are for 10 to 90% covered with nanoparticles of silicon or wherein the aerogel has a specific surface area between 10 and 500 m2 / g as measured using a BET (Braunauer-Emmett-Teller). The invention also relates to a method of making the aerogel and an electrode comprising the aerogel.

A cylindrical secondary battery includes a cylindrical case with open upper and lower portions, an electrode assembly including a negative electrode plate, a positive electrode plate, and a separator and accommodated in the case, a positive electrode cap sealing the open upper portion of the case, and a negative electrode cap sealing the open lower portion of the case, wherein the case includes a step portion formed along the perimeter of the open lower portion, the negative electrode cap is mounted on the step portion, and the step portion is configured such that at least a portion thereof protrudes in an inward direction to support a lower portion of the electrode assembly, the inward direction being toward a central axis of a circular cross-section of the case.

The present invention relates to a heterogeneous electrolyte-based secondary battery comprising: a positive electrode impregnated with a positive electrode electrolyte; a negative electrode impregnated with a negative electrode electrolyte; and a separator disposed between the positive electrode and the negative electrode and including a polymer-based solid electrolyte, in which the polymer-based solid electrolyte includes a polymer resin and an electrolyte, and the positive electrode electrolyte and the negative electrode electrolyte have different compositions from each other.

An electrode for a rechargeable lithium battery and a rechargeable lithium battery including the electrode are disclosed. The electrode may include a current collector and an electrode active material layer on the current collector, wherein the electrode active material layer includes an electrode active material; and a polymer binder including a first repeating unit represented by Chemical Formula 1 and a second repeating unit represented by Chemical Formula 2.

The present application provides a jelly roll and a battery, relating to the technical field of batteries, for solving a technical problem of insufficient interlayer electrolyte due to interlayer extrusion of electrode sheets of the jelly roll in the related technology, the jelly roll including: a negative electrode sheet and a positive electrode sheet which have opposite polarities, where the negative electrode sheet includes a negative electrode current collector having a first surface and a second surface along a first direction, the first surface being provided with a first coating layer, and the second surface being provided with a second coating layer; the first coating layer is provided with a plurality of grooves, and centers of two adjacent grooves are spaced apart by a first distance; the positive electrode sheet is provided with a plurality of convex parts and concave parts opposite to the convex parts, and a surface on which the convex parts of the positive electrode sheet are located is opposite to a surface on which the grooves of the negative electrode sheet are located; and along a width direction of the grooves, a size of projections of the convex parts on the negative electrode sheet is greater than the first distance. By providing the convex parts and the concave parts opposite to the convex parts on the positive electrode sheet, and also providing the grooves opposite to the convex parts on the negative electrode sheet, there is a support between the electrode sheets, and micro-spacing between the electrode sheets are increased, and thereby sufficient infiltration of electrolyte are ensured.

An electrode precursor composition for an alkali metal ion secondary cell, for example a lithium-ion secondary cell, is described. The electrode precursor composition includes a polymer-electrolyte gel matrix phase and a dispersed phase containing an electrochemically active material. The electrode precursor composition may be processed into an electrode.

Provided is an alkaline battery (1) including a positive electrode (5), a negative electrode (7), a separator (6), and an electrolytic solution which are accommodated in a container (8). The electrolytic solution is a potassium hydroxide aqueous solution having a concentration of 40% to 50%. The negative electrode consists of a gel-like negative electrode mixture containing a negative electrode active material and an alkaline aqueous solution. The alkaline aqueous solution contains potassium hydroxide and sodium hydroxide in a molar ratio range of 89:11 to 96:4. The positive electrode consists of a positive electrode mixture including a positive electrode active material containing silver oxide and manganese dioxide, and a blending ratio of manganese dioxide in the positive electrode mixture is 25% to 50% by mass.

A method for manufacturing a first electrode (1) of a battery cell (2), the method comprising at least the following steps: a) providing a substrate (3) for the first electrode (1) comprising at least an active material (4) of the first electrode (1) and a copolymer (5); and b) wetting the substrate (3) with a liquid electrolyte (6) and forming a gel polymer electrolyte (7) by reacting the copolymer (5) with the liquid electrolyte (6) to form the first electrode (1).

A method of designing a rechargeable battery includes a numerical value entering operation for entering detailed numerical values for a case, a separator, and an electrode plate, a calculation operation for deriving X and until an equation is satisfied, and a position-setting operation for setting the position of an electrode tab to be located on one side of the electrode plate.

Disclosed is an electrode precursor composition suitable for preparing a gel electrode, the composition containing an organic solvent, an alkali metal salt, and two or more polymers, the two or more polymers including at least an electronically insulating polymer and an electronically conductive polymer, wherein the electronically conductive polymer is present in a smaller volume fraction than the electronically insulating polymer.

A dispersion containing water, a gelling agent, and 0.3 to 2 wt. % of single-walled and / or double-walled carbon nanotubes with a weight ratio of the single-walled and / or double-walled carbon nanotubes to the gelling agent at least 0.05 and not more than 10, wherein the dispersion contains gel particles formed by agglomerates of gelling agent molecules physically bound into a weak gel network by single-walled and / or double-walled carbon nanotubes. Also disclosed a method for producing a dispersion, a method for producing cathode and anode slurries, cathode and anode slurries, and a cathode and an anode are provided. The problems of obtaining an aqueous dispersion of single-walled and / or double-walled carbon nanotubes with both high stability during storage and transportation and low viscosity under various processes of its application, and producing electrode slurries and then lithium-ion battery electrodes, are addressed.

A cylindrical secondary battery includes a cylindrical case with open upper and lower portions, an electrode assembly including a negative electrode plate, a positive electrode plate, and a separator and accommodated in the case, a positive electrode cap sealing the open upper portion of the case, and a negative electrode cap sealing the open lower portion of the case, wherein the case includes a step portion formed along the perimeter of the open lower portion, the negative electrode cap is mounted on the step portion, and the step portion is configured such that at least a portion thereof protrudes in an inward direction to support a lower portion of the electrode assembly, the inward direction being toward a central axis of a circular cross-section of the case.

To provide an alkaline battery, and a method for manufacturing an alkaline battery.SOLUTION: An alkaline battery accommodates a positive electrode, a negative electrode, a separator, and an electrolytic solution in a container. The electrolytic solution is a potassium hydroxide aqueous solution with a concentration of 40-50%. The negative electrode is formed of a gel-like negative electrode mixture including a negative electrode active material and an alkaline aqueous solution, and the alkaline aqueous solution is an alkaline aqueous solution including potassium hydroxide and sodium hydroxide at a molar ratio within a range of 89:11 to 96:4. The positive electrode is formed of a positive electrode mixture including silver oxide and manganese dioxide, and the blending ratio of manganese dioxide in the positive electrode mixture is 25 to 50 mass%.SELECTED DRAWING: Figure 1

An electrode or electrode precursor composition for an alkali metal ion secondary cell, for example a lithium-ion secondary cell, comprises a polymer-electrolyte gel matrix phase and a dispersed phase

An electrode structure for use in an electrochemical cell comprises a current collector layer having a current collector surface, an electrode layer having an electrode surface that faces the current

A method of preparing an electrode precursor composition for an alkali metal ion secondary battery is described. An electrode precursor composition comprises a polymer-electrolyte gel matrix phase and a dispersed phase comprising an electrochemically active material and carbon nanotubes. The method comprises the steps of mixing an electrochemically active material with a carbon nanotube dispersion comprising carbon nanotubes and a dispersion medium to produce a premix, drying the premix to remove at least some or substantially all of the dispersion medium to produce a dried premix, and mixing the dried premix with an electrolyte salt solution to produce an electrode precursor composition. An electrode precursor composition, an electrode, an electrochemical secondary battery, and an electrochemical energy storage device are also described.

Disclosed herein is an electrode structure for use in an electrochemical cell, the electrode structure comprising a current collector layer having a current collector surface; an electrode layer having an electrode surface that faces the current collector surface; and an interlayer located on the current collector surface and arranged between the current collector surface and the electrode surface. The interlayer comprises an electrically conductive additive comprising a tubular carbon material as a majority component by weight; and a binder comprising carboxymethyl cellulose, and which has a maximum thickness of 150 nm or less. Also provided are an electrochemical secondary cell comprising the electrode structure, and an electrochemical energy storage device comprising the electrochemical secondary cell. Also provided are methods for producing the interlayer of the electrode structure, an apparatus for use in such methods, and a use of the apparatus in a method of producing the electrode structure.

Nanoporous carbon-based scaffolds or structures, specifically carbon aerogels, and their manufacture and use are provided. An embodiment includes a silicon-doped anode material for lithium-ion batteries, which comprises polyimide-derived carbon aerogel beads. The carbon aerogel contains silicon particles and accommodates the silicon particles, which expand during lithiation. The anode material provides optimal properties for use in lithium-ion batteries.

A heterogenous electrolyte-based secondary battery includes: a cathode impregnated with a catholyte; an anode impregnated with an anolyte; and a separator interposed between the cathode and anode and including a polymer-based solid electrolyte, wherein the polymer-based solid electrolyte comprises a polymer resin and an electrolyte, and the catholyte and the anolyte have different compositions.

A battery cathode material includes cathode material, ceramic material, and carbon-containing gel. The cathode material includes lithium nickel cobalt manganese oxide (NCM), lithium nickel cobalt aluminum oxide (NCA), lithium nickel manganese oxide (LNMO), lithium cobalt oxide (LCO), lithium iron phosphate (LFP), lithium nickel cobalt manganese aluminum oxide (NCMA), or combinations thereof. The ceramic material surrounds the cathode material, and includes gallium, aluminum, or tantalum doped lithium lanthanum zirconium oxide (LLZO), lithium zinc titanate (LZTO), lithium aluminum titanium phosphate (LATP), lithium-zirconium phosphate (LZPO), lithium zirconate (LZO), or combinations thereof. The carbon-containing gel wrapping the cathode material, and includes binder and carbon-containing conductive material, in which the binder includes polyvinylpyrrolidone, polyvinyl alcohol, sodium dodecyl sulfonate, sodium dodecylbenzenesulfonate, glucose, carboxymethyl cellulose, alginate, or combinations thereof, and the carbon-containing conductive material includes carbon nanotube.

An electrode precursor composition for an alkali metal ion secondary battery is described. The electrode precursor composition comprises a polymer-electrolyte gel matrix phase, a dispersed phase comprising an electrochemically active material and a conductive additive. The conductive additive contains a tubular carbon material as a main component. An electrode of the same composition, a method of producing the electrode, an electrochemical secondary battery incorporating the electrode, and an electrochemical energy storage device incorporating the battery are also described.

An electrode for a rechargeable lithium battery and a rechargeable lithium battery including the electrode are disclosed. The electrode may include a current collector and an electrode active material layer on the current collector, wherein the electrode active material layer includes an electrode active material; and a polymer binder comprising a first repeating unit represented by chemical formula 1 and a second repeating unit represented by chemical formula 2.

A heterogenous electrolyte-based secondary battery includes: a cathode impregnated with a catholyte; an anode impregnated with an anolyte; and a separator interposed between the cathode and anode and including a polymer-based solid electrolyte, wherein the polymer-based solid electrolyte comprises a polymer resin and an electrolyte, and the catholyte and the anolyte have different compositions.

A jelly roll includes: a negative electrode sheet and a positive electrode sheet, where along a first direction, the negative electrode sheet includes a negative electrode current collector having a first surface being provided with a first coating layer and a second surface being provided with a second coating layer; the first coating layer is provided with multiple grooves, and centers of two adjacent grooves are spaced apart by a first distance; the positive electrode sheet is provided with multiple convex parts and concave parts corresponding to the convex parts, and a surface on which the convex parts of the positive electrode sheet are located is opposite to a surface on which the grooves of the negative electrode sheet are located; and along a width direction of the grooves, a size of projections of the convex parts on the negative electrode sheet is greater than the first distance.

The invention relates to carbon aerogels having high electric conductivity and adjustable microstructure in particular for cathode design in magnesium-sulfur batteries and polymer-electrolyte membrane fuel cells. The invention particularly refers to a high-conductivity carbon aerogel with adjustable microstructure, a method for its production and its use.

A dispersion containing water, a gelling agent, and 0.3 to 2 wt.% of single-walled and / or double-walled carbon nanotubes with a weight ratio of the single-walled and / or double-walled carbon nanotubes to the gelling agent at least 0.05 and not more than 10, wherein the dispersion contains gel particles formed by agglomerates of gelling agent molecules physically bound into a weak gel network by single-walled and / or double-walled carbon nanotubes. Also disclosed a method for producing a dispersion, a method for producing cathode and anode slurries, cathode and anode slurries, and a cathode and an anode are provided. The problems of obtaining an aqueous dispersion of single-walled and / or double-walled carbon nanotubes with both high stability during storage and transportation and low viscosity under various processes of its application, and producing electrode slurries and then lithium-ion battery electrodes, are addressed.

The invention discloses a graphene integrated water system energy storage device and application thereof, and belongs to the technical field of battery manufacturing. The preparation method comprises the following steps: (1) preparing a graphene modified electrolyte: adding high-purity water, inorganic salt and TEMPO or a derivative thereof into graphene oxide slurry, and mixing the high-purity water, the inorganic salt and the TEMPO or the derivative thereof; 2) mixing the graphene oxide slurry, the additional carbon material powder and high-purity water to form slurry, blade-coating the slurry to form a film, and forming aerogel to prepare an electrode; and 3) assembling the graphene modified electrolyte, an electrode and a diaphragm into an energy storage device. According to the graphene integrated water system energy storage device and the application thereof, the graphene modified electrolyte effectively inhibits the shuttle effect and side reaction, and the coulombic efficiency of the system is remarkably improved; the three-dimensional porous structure of the aerogel electrode accommodates electrolyte ions and limits the diffusion of the electrolyte ions, so that the specific capacity is improved; through the synergistic effect of the two, the energy storage device has excellent electrochemical performance, is convenient to assemble and high in safety, and has huge application value in the field of large-scale energy storage.

An electrode for a rechargeable lithium battery and a rechargeable lithium battery including the electrode are disclosed. The electrode may include a current collector and an electrode active material layer on the current collector, wherein the electrode active material layer includes an electrode active material; and a polymer binder including a first repeating unit represented by Chemical Formula 1 and a second repeating unit represented by Chemical Formula 2.