22 results about "Ion intercalation" patented technology

This application relates to a negative electrode material, and to a negative electrode, electrochemical apparatus, and electronic apparatus using the material. Specifically, this application provides a negative electrode material comprising graphite, wherein the I-stage lithium insertion platform potential P1 of the negative electrode material is 30mV to 75mV, and the II-stage lithium insertion platform potential P2 is 90mV to 110mV. By adopting the negative electrode material of this application, the cycle performance of electrochemical apparatus using it under high voltage and high temperature conditions can be significantly improved, the Coulomb capacity of the negative electrode material can be increased, and the initial efficiency of the negative electrode material can be achieved simultaneously.

This application discloses a method and apparatus for electrochemical extraction to obtain low-impurity lithium ions, relating to the field of capacitive deionization technology. The apparatus includes a positive current collector and a negative current collector with a working surface coated with mesoporous activated carbon material and a chemically de-intercalated lithium ion sieve. A lithium-ion-containing solution circulates between the working surfaces of the positive and negative current collectors. A voltage is applied to insert lithium ions into the chemically de-intercalated lithium ion sieve. After the power is turned off, the cations adsorbed by the mesoporous activated carbon material are re-desorbed. The resulting lithium-ion-intercalated sieve electrode is placed in an electrolyte solution and a voltage is applied to remove lithium. This application uses mesoporous activated carbon material as the negative electrode to adsorb impurity cations in the salt solution. The impurity cations are enriched on the surface of the activated carbon and do not accumulate on the surface of the ion sieve, hindering the absorption of lithium. + By placing the lithium ion extraction device closer to the chemical deintercalation sieve, the content of impurity cations intercalating into the sieve lattice can be reduced, thereby improving the lithium extraction efficiency and purity of the sieve.

This invention discloses a superlattice structure all-solid-state thin-film battery cathode material, its preparation method, and its applications. The cathode material consists of a substrate and a stacked structure deposited on the substrate surface. The stacked structure is formed by alternating deposition of a first transition metal oxide layer and a second transition metal oxide layer from bottom to top. The first and second transition metal oxides of this invention have different work functions and lithium-ion intercalation potentials. An integrated electric field is induced through interface bandgap engineering, synergistically enhancing electron / ion transport dynamics. Simultaneously, lattice pinning and lattice pre-strain are used to suppress structural degradation during cycling. The cathode material provided by this invention exhibits high specific capacity, excellent rate performance, long cycle life, and low preparation temperature, is compatible with semiconductor processes, and is suitable for microelectronic integrated systems.

The application discloses a preparation method of a zinc-doped core-shell NiCo2O4 / NiCo-LDH three-dimensional heterostructure electrode material and application thereof. The preparation method of the electrode material is as follows: carbon paper is used as a substrate, NiCo2O4 nanowires are used as a core, zinc-doped NiCo-LDH nanosheets are used as a shell, a three-dimensional hierarchical core-shell structure is constructed, and a two-step hydrothermal method is adopted. The preparation method is simple in process, controllable in cost, and easy for large-scale production. The electrode material is applied to a sodium ion battery. Through zinc doping, oxygen vacancies are induced to be generated, an electronic structure is optimized, and a sodium ion embedding / extraction dynamic process is significantly accelerated. Excellent results are achieved in the application of the sodium ion battery, and a new strategy is provided for design and development of a high-performance sodium ion battery transition metal-based electrode material.

This invention belongs to the field of sodium-ion battery technology, specifically relating to a nitrogen-doped hard carbon material, its preparation method and application, a sodium-ion battery anode, and a sodium-ion battery. This invention uses aminophenol as a dopant, which introduces nitrogen (N) into the hard carbon material, increasing the interlayer spacing and facilitating sodium ion intercalation. Simultaneously, the introduction of N can regulate the defect structure of the hard carbon material, enriching sodium storage sites. Based on these reasons, the specific capacity and cycle performance of the final hard carbon material are improved.

This invention relates to the field of battery technology, and in particular to a graphite anode material, its preparation method, and a secondary battery. The graphite anode material of this invention comprises multiple secondary graphite particles, each secondary particle comprising multiple primary graphite particles. The surface of each primary graphite particle is coated with a hard carbon layer, and each primary graphite particle has at least one pore containing hard carbon. The preparation method of the graphite anode material includes the following steps: granulating and graphitizing a mixture containing raw material coke and a hard carbon precursor sequentially to obtain the graphite anode material. In the graphite anode material of this invention, the hard carbon not only coats the surface of the primary graphite particles, forming secondary particles, but also penetrates into the interior of the primary graphite particles. The high disordered structure of the hard carbon is more conducive to lithium-ion intercalation. This graphite anode material exhibits excellent rate performance, initial charge-discharge efficiency, and cycle performance.

This application relates to the field of energy storage technology, providing a battery cell and its preparation method, battery device, power consumption device, and energy storage device. The battery cell includes: a cell assembly comprising a negative electrode, a separator, and a positive electrode stacked together; a casing containing the cell assembly; and an electrolyte containing the electrolyte within the casing. The negative electrode comprises a negative electrode active material, which includes a modified graphite material having a core-shell structure. The core-shell structure includes a shell and a core located within the shell. The core comprises graphite and a buffer sheet located between at least some layers of the graphite. The lithium intercalation potential of the buffer sheet is greater than that of the graphite, and the lithium intercalation potential of the shell is greater than that of the buffer sheet. This application at least facilitates precise control of the lithium-ion intercalation process and interfacial reactions from the interior to the surface of the material.

This invention relates to a pre-sodium-modified material mediated by layered transition metal oxides and its applications; the pre-sodium-modified material is obtained by mixing layered transition metal oxides and a sodium precursor, followed by high-temperature calcination or high-energy ball milling; wherein the chemical formula of the layered transition metal oxide material is AM. x O y A is Li + Na + or K + M is at least one of the transition metal ions from +2 to +7, 0 < x ≤ 5, 2 ≤ y ≤ 4; By using the method of the present invention, in order to address the problem of slow kinetics of traditional sodium carbonate pre-sodiumization agents, the present invention proposes to use layered oxides as cation intercalation mediators. By constructing a low-energy-barrier topological intercalation pathway and a cyclic mediating mechanism, the bulk phase transport resistance is reduced and high-quality capacity release is achieved, providing a low-cost, long-life in-situ pre-sodiumization scheme for sodium ion electrochemical energy storage devices.

The application discloses a kind of electric field induction-iron ion embedding type iron sodium phaeophytin preparation method and device.The method includes plant raw material slurry, pulse electric field wall breaking extraction, saponification forms chlorophyllin precursor liquid, using three-cavity membrane separation electric field reactor carries out bipolar membrane in-situ demag, iron anode electrochemistry releases iron and migrates to central coordination reaction cavity by cation exchange membrane, completes embedding iron under the control of pulse electric field and oxidation-reduction potential, then is salted by sodium, microfiltration, ultrafiltration, electrodialysis desalination and drying to obtain iron sodium phaeophytin product.The device includes raw material slurry module, pulse electric field processing module, saponification reaction module, membrane separation electric field reaction module, salted by sodium module, purification module, drying module and central controller.The application process is continuous, iron supply is controllable, demag and embedding iron are closely coupled, and is suitable for industrial implementation.

The present disclosure belongs to the technical field of lithium extraction and recovery from salt lakes, and particularly relates to a method for extracting lithium from salt lakes by using a flow electrode and a device for extracting lithium from salt lakes. 2+ and Mg 2+ The competitive effect when entering the flow electrode can make it more difficult for magnesium ions to enter the lithium-embedding slurry through the ion exchange membrane, thereby inhibiting the embedding of magnesium ions into the lithium-embedding and -extracting active material; and the electrode potential of calcium ions in the lithium-embedding and -extracting system is quite different from that of lithium ions, so calcium ions will not be embedded into the lithium-embedding and -extracting active material. Therefore, the method provided by the present disclosure can effectively separate lithium and magnesium, thereby improving the purity of recovered lithium.

This utility model discloses a stacked battery, belonging to the field of battery technology. The stacked battery includes a positive electrode, a positive tab, a negative electrode, a first tab, and a second tab. The positive tab protrudes from the top side of the positive electrode and is coated with a first coating near the bottom of the positive electrode. The first and second tabs are spaced apart and protruding from the top side of the negative electrode. The positive electrode is stacked on one side of the negative electrode. The second tab is coated with a second coating, which is positioned opposite to the first coating. Along the thickness direction of the stacked battery, the projection of the first coating falls on the projection of the second coating. This stacked battery allows the second coating to completely cover the first coating, enabling the second coating to provide lithium-ion intercalation sites corresponding to the first coating. This avoids lithium plating problems caused by the lack of corresponding lithium-ion intercalation sites in the first coating and improves the overall capacity of the stacked battery.

This invention relates to a microporous copper foil current collector with in-situ grown carbon nanotubes (CNTs), its preparation method, and its applications. The microporous copper foil current collector with in-situ grown CNTs comprises: a microporous copper foil substrate, the microporous copper foil substrate including a through-hole structure; and a carbon nanotube layer formed by carbon nanotubes in-situ grown on the surface of the microporous copper foil substrate and inside the pore structure; the carbon nanotube layer forms a three-dimensional conductive network structure on the surface of the microporous copper foil substrate and the pore walls. This invention, by in-situ growing CNTs on the surface and pore walls of the microporous copper foil substrate, forms a stable three-dimensional conductive network, improves the adhesion between the active material and the current collector, improves interfacial contact, inhibits the shedding of the negative electrode material, reduces internal resistance and polarization, and simultaneously improves lithium-ion intercalation efficiency, achieving a comprehensive improvement in cycle performance and energy density.

The application discloses an electrochemically active material and an electrochemical device. The electrochemically active material comprises: a primary structure comprising a nano unit, the nano unit having lithium / sodium ion intercalation and deintercalation capability; a secondary structure comprising the primary structure and a first transition region distributed between adjacent primary structures; and a tertiary structure comprising the secondary structure and a second transition region distributed between adjacent secondary structures. The nano unit is a main material for providing electrochemical activity. The first transition region aims to improve the internal or interface stability of the nano unit or to enhance the mass transfer rate in the short-range region between the nano unit interface and the nano unit. The second transition region is used to build a long-range mass transfer network or to improve the internal or interface stability of the secondary unit. Thus, the material has enhanced capability of maintaining the integrity of ion transmission channels and the continuity of electronic conduction in long cycles, thereby balancing the capacity retention rate and the rate performance of the material.

The application provides a preparation method of a sulfur ion intercalation zinc-manganese LDH supported biochar composite material, which comprises the following steps: washing and drying rice straw, crushing and sieving the rice straw to obtain rice straw powder; taking the rice straw powder, adding zinc chloride and manganese chloride tetrahydrate, and dispersing the mixture in deionized water to obtain a mixed solution; adjusting the pH of the mixed solution to alkaline, continuing to stir, centrifuging and washing, and drying to obtain a precursor powder; pyrolyzing the precursor powder in an inert atmosphere to obtain a zinc-manganese layered double hydroxide supported biochar composite material; and performing sulfur ion intercalation treatment on the composite material, centrifuging and washing, and drying to obtain a target material. The application also provides the composite material prepared by the above method and application. The zinc-manganese layered double hydroxide is supported on the biochar and modified by sulfur ion intercalation, so that the defects of single biochar, i.e. weak adsorption capacity for heavy metal anions, are compensated, and the synchronous and efficient adsorption and removal of heavy metal ions in water are realized.

This invention provides a method for preparing and applying a copper-doped molybdenum disulfide (MoS2) photocatalyst. The preparation method includes the following steps: using bulk MoS2 as raw material, two-dimensional MoS2 is exfoliated using a lithium-ion intercalation method; using two-dimensional MoS2 as a substrate, copper-supported MoS2 is prepared using an impregnation method; using thiourea and copper-supported MoS2 as raw materials, a copper-doped MoS2 photocatalyst is prepared using a heat treatment method. The copper-doped MoS2 photocatalyst prepared by this invention has a unique crystal phase composition of copper sulfide (CuS), cuprous sulfide (Cu2S), and molybdenum disulfide (MoS2). It can form a built-in electric field on the surface by balancing the Fermi level, suppressing electron-hole recombination, driving directional charge migration, and enhancing the photocatalytic activity of the catalyst. The catalyst proposed in this invention can efficiently remove perfluorooctanoic acid (PFOA), a new pollutant in water, under ultraviolet light.

The present application relates to a kind of high-voltage aqueous potassium ion full battery and the method for stabilizing prussian blue type negative material.High-voltage aqueous potassium ion full battery includes: the negative material of prussian blue type compound, positive material and the electrolyte of the aqueous solution of potassium salt added with organic matter additive composition;Electrolyte is the mixed solution of aqueous solution of potassium salt and organic matter additive, the binding energy of organic matter additive and potassium ion is greater than the binding energy of water and potassium ion, and organic matter additive is used to accompany potassium ion to insert, electrode and prevent the crystallization water inside negative electrode from being removed;When high-voltage aqueous potassium ion full battery is charged and discharged, potassium ion with water and / or organic matter additive molecular solvation shell layer is removed and inserted in positive electrode and negative electrode and reacts.

The application belongs to the field of energy storage material preparation, and particularly relates to application of a polyoxovanadate material in preparation of a water-based zinc storage positive electrode, and specifically provides a preparation method of the polyoxovanadate material and the zinc storage positive electrode, wherein manganese salt and vanadium oxide are used as raw materials, through ion induction strategy, V-O coordination polyhedrons of different valence states form diversified ion insertion-extraction molecular cluster open channels and molecular cluster structures in a self-assembly process, active sites inside the molecular cluster are fully utilized, heteroatoms are introduced, and the polyoxovanadate material is synthesized. In application, the polyoxovanadate zinc storage positive electrode is composed of a conductive agent, a binder and the polyoxovanadate material, so that the problems of active material loss of the positive electrode caused by cluster material dissolution can be solved, and the cycle performance and rate performance of the battery can be significantly improved.

A manufacturing method of an electrode of an energy storage element includes: providing a substrate into microwave plasma equipment; introducing a carrier gas and a carbon precursor gas into the microwave plasma equipment; forming multi-layer graphene walls on the substrate through microwave plasma chemical vapor deposition; and immersing the substrate containing the multi-layer graphene walls in an electrolyte solution to perform electrochemical activation treatment, so that ions in the electrolyte solution are intercalated between adjacent graphene walls. A volume ratio of the carrier gas to the carbon precursor gas is 1:10 to 10:1. An electrode of an energy storage element is also provided.

This invention relates to the field of polyamide fiber preparation and discloses a method for preparing a long-lasting antibacterial fabric of metal ion-embedded polyamide fiber, comprising: preparing a homogeneous precursor fluid with a hydrogen bond network; feeding polyamide melt into a melt modification device, injecting the precursor fluid in the homogenization section to form a mixed melt; inputting specific shear work into the mixed melt by adjusting the shear rate to induce macromolecular chain extension to expose amide groups, causing the precursor fluid phase to decompose and release metal ions, forming metal complexation sites; and locking the metal complexation sites in the amorphous region of the fiber through melt spinning and cooling stretching to produce antibacterial fiber and weave it into a fabric. This invention achieves atomic-level dispersion of functional components through an in-situ coordination mechanism, eliminates component pressure drop fluctuations caused by inorganic phase agglomeration, preserves the intrinsic mechanical strength of the fiber, and achieves simultaneous antibacterial performance and fiber lifespan.

This invention discloses a superlattice structure all-solid-state thin-film battery cathode material, its preparation method, and its applications. The cathode material consists of a substrate and a stacked structure deposited on the substrate surface. The stacked structure is formed by alternating deposition of a first transition metal oxide layer and a second transition metal oxide layer from bottom to top. The first and second transition metal oxides of this invention have different work functions and lithium-ion intercalation potentials. An integrated electric field is induced through interface bandgap engineering, synergistically enhancing electron / ion transport dynamics. Simultaneously, lattice pinning and lattice pre-strain are used to suppress structural degradation during cycling. The cathode material provided by this invention exhibits high specific capacity, excellent rate performance, long cycle life, and low preparation temperature, is compatible with semiconductor processes, and is suitable for microelectronic integrated systems.

An electrode assembly and a processing method and apparatus therefor, a battery cell, a battery, and a power consuming device are provided. The processing method includes: applying an adhesive on a preset part of a surface of a member to be coated, the adhesive forming a barrier layer, and the member to be coated including at least one of a cathode plate, a separator, and an anode plate; and winding the cathode plate, the anode plate, and the separator to form an electrode assembly. The barrier layer is located between the cathode active material layer and the anode active material layer adjacent to each other after the winding. The barrier layer blocks at least some ions de-intercalated from the cathode active material layer located on one side of the barrier layer from being intercalated into the anode active material layer located on the other side of the barrier layer.