24 results about "Electroactive materials" patented technology

The invention relates to a particulate material and processes for the preparation thereof. The particulate material consists of a plurality of composite particles. The composite particles comprise a porous particle framework comprising micropores and / or mesopores. The total pore volume of micropores and mesopores as measured by gas adsorption is in the range from 0.4 to 2.2 cm3 / g. The composite particles comprise a plurality of electroactive material domains and a plurality of modifier material domains disposed within the internal pore volume of the porous particle framework. At least a portion of the modifier material domains are located between adjacent electroactive material domains.

A method is provided for manufacturing composite particles for use as electroactive materials in metal-ion batteries. The process involves preparing porous particulate frameworks with defined pore volumes, selectively infiltrating these pores with a blocking agent, and removing the solvent to deposit the agent. This results in partial pore blockage, rendering some pores inaccessible to precursor gases. The blocked volume is controlled within a specified range relative to the initial pore volume. The frameworks are then exposed to an electroactive material precursor gas under conditions that enable deposition within the accessible pores, forming composite particles suitable for battery applications.

An aqueous cathode slurry containing a dispersant is provided. A battery, a vehicle having a battery, and a method for manufacturing a battery are also provided. One method for manufacturing a battery includes: forming an amphiphilic polymer dispersant; forming an aqueous cathode material slurry by simultaneously or continuously adding the following substances to water: the amphiphilic polymer dispersant; a positively active material; and a binder; and forming a cathode from the aqueous cathode material slurry.

This invention belongs to the field of electrode material technology, and relates to a lithium extraction electrode, its preparation method, and its application. The preparation method of the lithium extraction electrode is as follows: A mixture of LiMn2O4 and C powder is added to a micro-suspension system composed of an oil phase and an aqueous solution containing a stabilizer. Free radical-initiated polymerization is then carried out to obtain LiMn2O4-based porous active microparticles with a core-shell structure and surface-anchored hydrophilic macromolecules. The oil phase consists of vinyl monomers, a solvent, and a surfactant. Using the LiMn2O4-based porous active microparticles as the electroactive material, they are mixed and cured with a conductive agent, a hydrophilic binder, and a crosslinking agent to obtain the lithium extraction electrode. This lithium extraction electrode has a stable structure, high water permeability, and uniform internal and external electric fields. It can significantly improve the lithium ion transport rate and electrode lifetime during electrochemical lithium extraction, and has broad application prospects in electrochemical lithium extraction.

The present invention relates to a method of preparing composite particles by chemical vapor infiltration of an electroactive material into porous particles. The chemical vapor infiltration is performed in at least two different stages, including at least one discontinuous stage and at least one continuous stage.

The invention relates to a reference electrode, an electrochemical device including the reference electrode, and a method of manufacturing the reference electrode. The reference electrode assembly includes a separator substrate and a reference electrode layer. The separator substrate is porous and electrically insulating. The reference electrode layer is in direct contact with the separator substrate. The reference electrode layer includes an electroactive material, a conductive material, and a binder. The conductive material is mixed with the electroactive material.

An electrochemical method and an apparatus for extracting lithium from a solution using bipolar electrodes are provided. The apparatus adopts electrodes respectively coated with a lithium-rich electroactive material and a lithium-deficient electroactive material as end plates, which are separated by a plurality of bipolar electrodes coated with a lithium-rich electroactive material and a lithium-deficient electroactive material respectively on two sides, where the side of the bipolar electrode facing the end plate of the lithium-rich electroactive material is coated with the lithium-deficient electroactive material, and the side of the bipolar electrode facing the end plate of the lithium-deficient electroactive material is coated with the lithium-rich electroactive material. The apparatus adopts a conventional voltage, requires a small total current and a simple power supply, greatly reduced the amount of busbar required, allows for easy process control, and is suitable for industrial production.

A solvent-free process employs carbon nanostructures to prepare compositions and electrodes for lithium-ion batteries. The carbon nanostructures can be multifunctional, providing two or more desirable characteristics, acting, for example, as a conductive carbon additive, as a fibrillizing agent and / or as a mechanical reinforcement. In one example, an electroactive material, a binder, e.g., PTFE, and carbon nanostructures are combined in one or more steps. High shear mixing is used to process the binder in the presence of the carbon nanostructures. In some implementations, the carbon nanostructures are provided in combination with a carbon black and / or with carbon nanotubes. Some anode compositions can be prepared by processing the binder in the presence of a composite that contains the carbon nanostructures and an active anode material. Generally, the binder is processed in the absence of solvent. The resulting composition can be formed into a film which can be applied onto a suitable substrate to form an electrode.

A process for manufacturing composite particles for use as electroactive materials in metal-ion batteries comprises preparing porous particulate frameworks with micropores and optional mesopores, sele

The application relates to the technical field of electroactive materials, in particular to an electroactive material and a preparation method and application thereof. The application provides a preparation method of an electroactive material, which comprises the following steps: dissolving a pore-forming agent, an iron salt and a manganese salt in a sugar solution, initiating a hydrothermal reaction to obtain a hydrothermal product; and high-temperature carbonizing the hydrothermal product in an oxygen-free environment to obtain an iron-manganese-carbon electroactive material. The application provides an electroactive material and a preparation method and application thereof, and the electroactive material can still have high nitrogen and phosphorus removal efficiency in a low-temperature environment.

A method for producing an electrode for an electrochemical cell, the method comprising: providing a mixture containing an electroactive material, a binder, and a solvent; rolling the mixture into a film; forming a multilayer stack from the film; forming an electrode film precursor by performing a plurality of successive rolling operations, each rolling operation comprising rolling the multilayer stack through a first gap defined in a direction transverse to a plane of the multilayer stack, the plurality of successive rolling operations comprising: a first rolling operation in which the multilayer stack is in a first orientation with respect to a machine direction, and a second rolling operation in which the multilayer stack is in a second orientation with respect to the machine direction, the second orientation being different from the first orientation;Forming an electrode film by rolling the electrode film precursor through a second gap defined in direction, wherein the second gap is less than or equal to the first gap; and drying the electrode film to remove at least some of the solvent to form the electrode.

Embodiments of the present invention provide a binder-free electrode of an electrochemical device fabricated using a plasma printing process. The process (100) comprises depositing electroactive mater

This invention provides a non-contact interactive system based on a photoelectric sensor array, comprising: a photoelectric sensor array, the photoelectric sensor array including: a transparent substrate; a conductive layer formed on the transparent substrate; a patterned confinement layer formed on the conductive layer for forming a patterned array of photoelectric active materials; a patterned array of photoelectric active materials formed on the patterned confinement layer, wherein each patterned unit in the array forms a miniature photoelectric sensor unit under the drive of an external bias voltage; a surface light source located on the back side of the substrate of the photoelectric sensor array; and a reflector movably located on the front side of the substrate of the photoelectric sensor array. This interactive system utilizes the high responsivity and fast response speed characteristics of the photoelectric sensor array to enable the interactive interface to quickly track signals from moving objects, and achieves photocurrent growth through light reflection from the reflector onto the surface light source, thereby realizing a responsive, contactless, three-dimensional human-computer interaction.

An electrode for a rechargeable lithium battery, a method for manufacturing the electrode for a rechargeable lithium battery, and a rechargeable lithium battery including the electrode are disclosed. The method for manufacturing an electrode for a rechargeable lithium battery may include forming or providing a support layer including a body part and a side part, a first thickness of the body part being greater than a second thickness of the side part; forming or providing a composite substrate by forming or providing a metal layer on a surface of the support layer, the composite substrate including a coating part superimposed on the body part and a bare part superimposed on the side part; forming or providing an active material layer (e.g., an electrically active material layer) on the coating part of the composite substrate; and performing a rolling process on the active material layer.

A composite electrode for an electrochemical cell that cycles lithium ions may include a metal current collector having a three-dimensional porous structure defining an interconnected network of open pores and an electrode material disposed within the open pores of the current collector. An oxygen-containing reactive layer may be formed on surfaces of the current collector and an electrode precursor mixture may be deposited thereon and dried to form a solid electrode material having a continuous structure within the open pores of the current collector. The electroactive material particles and / or the electrically conductive agent may interact with the oxygen-containing reactive layer on the metal current collector to form an oxygen-containing adhesive layer along an interface between the current collector and the solid electrode material. The electroactive material particles and the electrically conductive agent may be chemically bonded to the current collector via hydrogen bonds within the oxygen-containing adhesive layer.

A battery that cycles lithium ions includes a positive electrode and a liquid electrolyte infiltrating the positive electrode. The electrolyte includes an organic solvent mixture, a primary lithium salt, a fluoroborate salt, a phosphite additive, and a solid electrolyte interphase (SEI)-forming additive in the organic solvent mixture. The organic solvent mixture includes ethylene carbonate and ethyl methyl carbonate. The fluoroborate salt constitutes, by weight, greater than or equal to 0.1% and less than or equal to 2% of the electrolyte. The phosphite additive constitutes, by weight, greater than or equal to 0.01% and less than 3% of the electrolyte. The positive electrode includes an electroactive material comprising a layered lithium-rich and manganese-based transition metal oxide (LRMO).

Electrochemical cell in which lithium ions move back and forth, comprising: Electrode comprising a chalcogen-containing electroactive material, wherein the chalcogen-containing electroactive material comprises elemental selenium or a selenium-containing active material; and Electrolyte system, including: one or more lithium salts selected from the group consisting of: lithium bis(fluorosulfonyl)imide (LiN(FSO2)2), bis(trifluoromethane)sulfonimide lithium salt (LiN(CF3SO2)2), lithium hexafluorophosphate (LiPF6), lithium hexafluoroarsenate (LiAsF6), lithium tetrafluoroborate (LiBF4), lithium perchlorate (LiClO4), lithium iodide (LiI), lithium bromide (LiBr), lithium thiocyanate (LiSCN), lithium difluoro(oxalato)borate (LiBF2(C2O4)), LiPF3(C2F5)3, LiPF4(CF3)2, lithium tetrafluoro(oxalato)phosphate (LiPF4(C2O4)), LiPF3(CF3)3, LiSO3CF3 and combinations thereof, and one or more solvents selected from the group consisting of: cyclic carbonates, linear carbonates, aliphatic carboxylic esters, γ-lactones, chain structure ethers, cyclic ethers and combinations thereof, wherein the electrolyte system is essentially free of lithium nitrate (LiNO3) and the electrochemical cell has a minimum charge potential of more than or equal to about 0.8 V to less than or equal to about 1.8 V.

A reference electrode assembly comprises a separator substrate and a reference electrode layer. The separator substrate is porous and electrically insulating. The reference electrode layer is in direct contact with the separator substrate. The reference electrode layer comprises an electroactive material, an electrically conductive material, and a binder. The electrically conductive material is mixed with the electroactive material.

A solvent-free process employs a composite that includes carbon nanotubes and a polymer to prepare compositions and electrodes for lithium-ion batteries. The carbon nanotubes in the composite can be multifunctional, providing two or more desirable characteristics, acting, for example, as a conductive carbon additive, as a processing, e.g., fibrillizing, agent and / or as a mechanical reinforcement. The composite can be combined with an electroactive material and a binder; the binder can be processed, e.g., fibrillated, in the presence of the carbon nanotubes in the composite. The resulting composition can be formed into a film which can be applied onto a suitable substrate to form an electrode.

A reference electrode assembly includes a separator substrate and a reference electrode layer. The separator substrate is porous and electrically insulating. The reference electrode layer is in direct contact with the separator substrate. The reference electrode layer includes an electroactive material, an electrically conductive material, and a binder. The electrically conductive material is intermingled with the electroactive material.

Batteries, vehicles with batteries, and methods for making batteries are provided. A method for making a battery includes forming an amphiphilic polymer dispersant; forming an aqueous cathode material slurry by concurrently or consecutively adding to water: the amphiphilic polymer dispersant, a positive electroactive material; and a binder; and forming a cathode from the aqueous cathode material slurry.

This invention relates to particulate electroactive materials comprising a plurality of composite particles, wherein the composite particles comprise: (a) a porous carbon framework including micropores and / or mesopores having a total volume of at least 0.7 cm3 / g, wherein at least half of the micropore / mesopore volume is in the form of pores having a diameter of no more than 5 nm; and (b) silicon located within the micropores and / or mesopores of the porous carbon framework in a defined amount relative to the volume of the micropores and / or mesopores.