117results about "Gel electrodes" patented technology

Embodiments described herein relate generally to electrochemical cells having semi-solid electrodes that are coated on only one side of a current collector. In some embodiments, an electrochemical cell includes a semi-solid positive electrode coated on only one side of a positive current collector and a semi-solid negative electrode coated on only one side of a negative current collector. A separator is disposed between the semi-solid positive electrode and the semi-solid negative electrode. At least one of the semi-solid positive electrode and the semi-solid negative electrode can have a thickness of at least about 250 μm.

Embodiments described herein relate generally to devices, systems and methods of producing high energy density batteries having a semi-solid cathode that is thicker than the anode, An electrochemical cell can include a positive electrode current collector, a negative electrode current collector and an ion-permeable membrane disposed between the positive electrode current collector and the negative electrode current collector. The ion-permeable membrane is spaced a first distance from the positive electrode current collector and at least partially defines a positive electroactive zone. The ion-permeable membrane is spaced a second distance from the negative electrode current collector and at least partially defines a negative electroactive zone. The second distance is less than the first distance. A semi-solid cathode that includes a suspension of an active material and a conductive material in a non-aqueous liquid electrolyte is disposed in the positive electroactive zone, and an anode is disposed in the negative electroactive zone.

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

An electrochemical cells and methods of forming the same are described. An electrochemical cell includes an anode, a cathode, a separator, and a liquid electrolyte. The cathode includes an active material, a conductive material, a binder, and a gelling electrolyte. The separator is arranged between the anode and the cathode. The separator is configured to prevent direct contact between the anode and the cathode. The liquid electrolyte transports ions between the cathode and the anode.

Disclosed is an electrode precursor composition suitable for preparing a gel electrode, the composition comprising an organic solvent, an alkali metal salt, an electrically insulating polymer, and a redox-active organic component, where the redox-active organic component is present at a smaller volume fraction than the electrically insulating polymer. The redox active organic component may be present in the electrode precursor composition in an amount of between 1 and 20 vol% based on the total volume of the electrode precursor composition. The redox-active organic component may be present in the electrode precursor composition in an amount of up to 8% by volume based on the total volume of the electrode precursor composition. The redox active organic component may be a redox active polymer.

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 method for manufacturing an electrode comprising a polymer matrix enclosing an electrolyte, the method comprising the steps of: a) preparing a composition comprising components intended to be included in the construction of the electrode; and b) forming an electrode from the composition on a support, the composition being such that the composition prepared in step a) is 0.1 s -1 a composition in paste form having a kinematic viscosity of more than 5000 Pa.s measured at a shear gradient of 0.15 mm and at ambient temperature; - a preparation step consisting of introducing the components intended to be included in the construction of an electrode into a mixer equipped with two co-rotating intermeshing screws rotating in a closed sleeve and mixing the components therein, characterized in that the preparation step is carried out at a temperature below 100°C.

A flexible battery, comprising: one or more cathodes; one or more anodes; a stretchable electrolyte in ionic communication with the one or more cathodes and the one or more anodes, the stretchable electrolyte defining a cathode contact area with the one or more cathodes, the stretchable electrolyte defining an anode contact area with the one or more rigid anodes, the stretchable electrolyte optionally comprising a hydrogel; and (1) the one or more cathodes defining a sliding interface with the stretchable electrolyte, (2) the one or more anodes defining a sliding interface with the stretchable electrolyte, or both (1) and (2). A method, comprising powering a device that comprises a stretchable battery according to the present disclosure. A method, comprising effecting operation of a device that comprises a stretchable battery according to the present disclosure.

Disclosed is an electrode precursor composition suitable for preparing a gel electrode, the composition comprising an organic solvent, an alkali metal salt, and two or more polymers including at least an electrically insulating polymer and an electrically conductive polymer, where the electrically conductive polymer is present at a smaller volume fraction than the electrically insulating polymer. The conductive polymer may be present in the electrode precursor composition in an amount of between 1 and 20 vol% based on the total volume of the electrode precursor composition. The conductive polymer may be present in the electrode precursor composition in an amount of up to 8% by volume based on the total volume of the electrode precursor composition. The conductive polymer may be redox active.

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 precursor composition suitable for preparing a gel electrode comprises an organic solvent, an alkali metal salt, and two or more polymers, the two or more polymers including at least an e

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.

The present specification 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 interposed between the positive electrode and the negative electrode and including a polymer-based solid electrolyte, wherein 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.

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.

Nanoporous carbon-based scaffolds or structures, and in particular carbon aerogels, and their manufacture and use are provided. Embodiments include a silicon-doped anode material for a lithium-ion battery, wherein the anode material comprises polyimide-derived carbon aerogel beads. The carbon aerogel contains silicon particles and accommodates the expansion of the silicon particles during lithiation. The anode material provides optimal properties for use in a lithium-ion battery.

The present invention relates to a method for manufacturing an electrode-electrolyte laminate for a lithium metal battery cell. The method includes depositing a ceramic electrolyte layer onto a first surface of a polymer separator, and depositing a lithium metal layer onto an exposed surface of the ceramic electrolyte layer. The electrode-electrolyte laminate prepared by the method can be used to manufacture an electrochemical cell.

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 and electrode for an alkali metal ion secondary cell include a polymer-solvent gel matrix phase 2 and a dispersed phase comprising an electrochemically active materi

The present disclosure relates to carbon aerogel-based electrode materials and methods of making the same. Nanoporous carbon-based scaffolds or structures, and in particular carbon aerogels and their manufacture and use are provided. Embodiments include a silicon-doped anode material for a lithium-ion battery, wherein the anode material comprises polyimide-derived carbon aerogel beads. The carbon aerogel contains silicon particles and accommodates the expansion of the silicon particles during lithiation. The anode material provides optimal performance for use in a lithium-ion battery.

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.

Winding cell, characterized in that it comprises: a negative electrode plate and a positive electrode plate arranged in a stacked manner; wherein the negative electrode plate comprises a negative electrode current collector having a first surface and a second surface arranged opposite one another in a first direction, the first surface being provided with a first paste layer and the second surface being provided with a second paste layer; wherein the first paste layer is provided with a plurality of grooves, and wherein the centers of two adjacent grooves are spaced apart from each other by a first distance; wherein the positive electrode plate is provided with a plurality of projections and recesses corresponding to the projections, and wherein a surface on which the projections of the positive electrode plate are located and a surface on which the grooves of the negative electrode plate are located are arranged opposite each other; and wherein the dimension of a vertical projection of the protrusion in a thickness direction onto the negative electrode plate, measured in a width direction of the groove, is greater than the first distance.

An alkaline battery includes a positive electrode, a negative electrode, and a separator. The negative electrode includes zinc alloy powder, gelling agent, surface active agent, and electrolyte. The zinc alloy powder includes zinc alloy particles. A proportion of the zinc alloy particles with respect to zinc alloy powder that passes through a mesh having an aperture width of 75 μm ranges from 9 mass % to 28 mass %. The zinc alloy powder has a bulk density ranging from 2.7 g / cm3 to 3.2 g / cm3. A content of the zinc alloy powder in the negative electrode ranges from 60 mass % to 64 mass %.

An alkaline electrochemical cell includes a cathode, an anode which includes an anode active material, and a non-conductive separator disposed between the cathode and the anode, wherein from about 20% to about 50% by weight of the anode active material relative to a total amount of anode active material has a particle size of less than about 75 μm, and wherein the separator includes a unitary, cylindrical configuration having an open end, a side wall, and integrally formed closed end disposed distally to the open end.

An accumulator with a bipolar architecture that comprises two terminal current collectors, between which a stack of n electrochemical cells is disposed, with n being an integer at least equal to 2, wherein: —each electrochemical cell comprises a positive electrode, a negative electrode and an ion conducting membrane that is interposed between the positive electrode and the negative electrode and comprises a liquid electrolyte included in the electrodes and the ion conducting membrane; —the n electrochemical cells are separated from each other by n−1 bipolar current collectors; wherein the positive electrode and the negative electrode of each electrochemical cell are gel electrodes comprising a composite material comprising a polymeric matrix made of at least one gelling polymer (FF), an active electrode material and optionally one or more electronic conductive additives, the polymeric matrix trapping the liquid electrolyte.

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).

The present invention relates to the field of lithium-ion battery negative electrodes, and discloses a silicon-carbon composite material coated with a carbon aerogel material and a preparation method thereof. The silicon-carbon composite material comprises nano-silicon particles and a porous carbon layer. In the present invention, the natural polymer material carrageenan is dissolved in water, and after adding nano-silicon particles, a gel colloidal structure with uniformly dispersed nano-silicon particles is formed at room temperature. Subsequently, a flexible carbon aerogel-coated silicon negative electrode material is prepared through carbon fiber wrapping formed by in-situ carbonization of cellulose esters, low surface tension solvent replacement, and high-temperature carbonization processes. The material of the present invention has high porosity and self-supporting properties, which significantly improves the performance of the material compared to similar materials.

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.