178 results about "Ion intercalation" patented technology

The invention relates to the field of batteries, in particular to a long-circulation persistent adhesion type negative electrode composite electrode and a preparation method and application thereof. The long-circulation persistent adhesive type negative electrode composite electrode comprises a current collector, and a first adhesive layer, an active slurry coating and a second adhesive layer which are sequentially coated on two sides of the current collector, according to the invention, through the bonding effect between the second bonding layer and the diaphragm, the pole piece is uniformly stressed during cyclic expansion, the wrinkles of the pole piece are improved, the electrolyte infiltration is better in combination with the oil-absorbing conductive agent, the lithium ion transmission efficiency is improved, and the cycle life is prolonged; an interface structure formed by multi-layer coating can buffer lithium ion intercalation / deintercalation stress, so that the pole piece can still keep good binding power after circulation, and the cycle performance of the lithium ion battery can be effectively improved; the conductive agent contents of the first bonding layer, the active slurry coating and the second bonding layer are distributed in a concave gradient manner, so that the resistance is reduced, and the conductivity is enhanced.

The invention belongs to the technical field of batteries, and particularly relates to a waste oil mediated preparation method of a whole-domain low-defect pseudographite domain-rich hard carbon material and a method and high-rate sodium ion energy storage. The preparation method comprises the following steps: uniformly mixing and stirring dried biomass and waste grease, putting the mixture into a tubular furnace, heating under protective gas, carrying out high-temperature carbonization, washing with a diluted hydrochloric acid solution and deionized water in sequence, and drying to obtain the waste oil mediated whole-domain low-defect pseudo-graphite domain high-rate hard carbon negative electrode material. According to the waste oil mediated global low-defect and pseudo-graphite domain-enriched high-rate hard carbon negative electrode material obtained by the invention, the structural stability of the material in an ion intercalation / deintercalation process is enhanced, the cycle life of an electrode is effectively prolonged, the high-rate performance of the material can be considered while the platform capacity is ensured, and the service life of the material is prolonged. And it is ensured that the electrode can still maintain high capacity output and good cycling stability under the large-current charging and discharging condition.

The invention relates to the technical field of sodium-ion batteries, and discloses a super-crosslinked asphalt-based hard carbon material, a preparation method and application thereof, and a sodium-ion battery. Asphalt is subjected to super-crosslinking by adopting a mechanochemical method, and the asphalt, a crosslinking agent and a catalyst realize fracture and recombination of chemical bonds under the action of mechanical shearing force of grinding balls, so that the super-crosslinked asphalt-based hard carbon material is obtained. According to the present invention, the asphalt is subjected to segmented ball milling and super-crosslinking, and then carbonization sintering is performed, such that the asphalt cannot be subjected to molecular rearrangement so as to finally form the hard carbon material with the more suitable microporous structure and the more suitable interlayer spacing, such that the negative electrode ion embedding requirement of the sodium ion battery is met, the excellent sodium storage performance is represented, and the capacity and the first coulombic efficiency of the assembled battery are improved; the performance improvement of the sodium ion battery is integrally promoted. The method is low in energy consumption, short in time consumption, simple in parameter control and suitable for large-scale application and popularization.

The invention discloses a preparation method and application of an antioxidant MXene-based flowing electrode material capable of realizing efficient capacitance defluorination, and belongs to the technical field of water treatment. The preparation method comprises the following steps: sequentially carrying out nitrogen doping and cysteine modification on MXene to obtain the antioxidant MXene-based flowing electrode material capable of realizing efficient capacitance defluorination. The MXene is prepared by a Lewis acid fused salt etching method. According to the method disclosed by the invention, the electrochemical performance of the MXene electrode is effectively improved, the conductivity of the MXene electrode is enhanced, the protection of terminal groups is realized through cysteine modification, and the oxidation resistance of the MXene electrode is improved. The anti-oxidation MXene-based flowing electrode material prepared by the invention has high specific surface area, large pore volume and multiple adsorption sites, and can realize specific efficient adsorption of fluorine ions through ion intercalation and special functional groups at end positions.

The invention discloses a high-performance sodium ion battery negative electrode ZnS / CoS (at) C composite material and a preparation method thereof, the material preparation method has the characteristics of definite control parameter, easy purity control, simple operation, good process repeatability and the like, and the prepared sodium ion secondary battery negative electrode material has excellent sodium ion intercalation and deintercalation capability and can be used for preparing a sodium ion secondary battery negative electrode material. The specific capacity, the cycling stability, the coulombic efficiency and the rate capability of the sodium ion secondary battery can be effectively improved, the requirements of different conditions can be met, and the application prospect is wide.

The invention relates to the technical field of magnesium alloy surface protection treatment, and particularly discloses a preparation method of an amino acid ion intercalated MgFe-LDHs composite coating. Preparing a magnesium alloy matrix, and pretreating the magnesium alloy matrix; the pretreated magnesium alloy matrix is subjected to plasma electrolytic oxidation, and an obtained PEO sample is placed in absolute ethyl alcohol for standby application; the preparation method comprises the following steps: adding FeCl2. 4H2O or amino acid and FeCl2. 4H2O into water to prepare a solution A; placing the solution A in a container, adding a PEO sample, and then placing the container on a shaking table for oscillation treatment; sequentially carrying out ultrasonic washing and drying on the treated sample; preparing a NaOH solution, and adding amino acid or preparing the NaOH solution; carrying out heating treatment on the dried sample and the prepared solution; and after treatment, ultrasonic cleaning and drying are sequentially carried out, and the MgFe-LDHs composite coating with the amino acid ion intercalation is obtained. The prepared coating does not harm human health after being degraded, and has good biocompatibility and high corrosion resistance.

A sodium battery precursor, and a preparation method therefor and the use thereof. The preparation method comprises the following steps: (1) mixing a nickel salt, a manganese salt and an iron salt with a solvent to obtain a solution A, mixing a copper salt, a complexing agent and a solvent to obtain a solution B, and mixing one or more of a lithium salt, a zinc salt, a titanium salt or a magnesium salt with a solvent to obtain a solution C; (2) injecting an alkali liquor, ammonia water and the solution A into a base solution in parallel flow for a first-step co-precipitation reaction, and injecting ammonia water, the alkali liquor and the solution B in parallel flow for a second-step co-precipitation reaction; and (3) injecting a precipitant solution and the solution C in parallel flow for a third-step co-precipitation reaction, thereby obtaining the sodium battery precursor. A high-entropy superlattice sodium battery precursor is prepared by means of step-by-step co-precipitation, and the sodium battery precursor enables the improvement of the sodium-ion intercalation and de-intercalation capability of the precursor while reducing the material cost, thereby improving the capacity retention ratio and cycling performance of the material.

A rechargeable battery is disclosed. The rechargeable battery comprises an anode, a cathode comprising a lithium-ion intercalation host, and an electrolyte comprising a solvent and a halogen-containing compound acting as an active cathode conversion material, wherein the electrolyte is in contact with the anode and the cathode.

The invention discloses a preparation method and application of an organic molecule metal ion double-intercalation vanadium-based oxide positive electrode material, and the method comprises the following steps: S1, adding 2, 5-hexanedione, aluminum chloride and a vanadium-based oxide into deionized water according to a preset molar ratio, and stirring to a uniform state; s2, continuously stirring the solution prepared in the step S1, controlling the stirring rate, and dropwise adding diluted hydrochloric acid to adjust the pH value to a target pH value; and S3, washing and drying the material prepared in the step S2 to obtain the organic molecule metal ion double-intercalation vanadium-based oxide positive electrode material. The vanadium-based oxide positive electrode material is optimized by applying an organic molecule metal ion double-intercalation strategy, the skeleton is greatly stabilized, the bonding mode of the vanadium-based oxide is optimized, more Zn < 2 + > ion intercalation active sites are provided, and the electrochemical performance of the material is improved. The prepared organic molecule metal ion double-intercalation vanadium-based oxide positive electrode material shows excellent cycling stability, relatively high specific capacity and excellent rate capability.

The invention relates to an efficient and stable electrode material and a preparation method thereof.The preparation method comprises the steps that a nickel net substrate is pretreated, then an electroplating solution containing a nickel source and a pore forming agent is prepared, a layered nickel hydroxide layer is generated on the substrate through electro-deposition, then ions enter the nickel hydroxide layer through a soaking embedding method or an electrochemical embedding method, and the electrode material is obtained. And finally, sintering in a nitrogen atmosphere, controlling the sintering temperature, the sintering time and the heating and cooling rate, and performing cooling after-treatment to obtain the electrode material. Compared with the prior art, the catalytic performance and the stability of the electrode are optimized through the steps of ion embedding and sintering. The method is suitable for preparing an electrode for efficient water electrolysis reaction, a porous structure promotes rapid emission of gas and increases the active surface area, and ions embedded in the surface are used for forming a shell with high catalytic activity.

The invention provides metal ion intercalation vanadium dioxide as well as a preparation method and application thereof, belongs to the technical field of aqueous iron ion batteries, and aims to solve the technical problem of low energy density of an aqueous iron ion battery positive electrode material. The preparation method of the metal ion intercalation vanadium dioxide comprises the following steps: dispersing vanadium pentoxide, a reducing agent and a metal source into a solvent to obtain a mixed solution; and reacting the mixed solution to obtain the metal ion intercalation vanadium dioxide nanosheet. The synthesis method provided by the invention is a one-step hydrothermal method, the synthesis method is relatively simple, environment-friendly and relatively low in cost, and the prepared material is a relatively uniform nanosheet. The prepared metal ion intercalation vanadium dioxide nanosheet is used as a positive electrode material of an iron ion battery, 284.32 mAh g <-1 > can be provided under the current density of 0.1 A g <-1 >, and the average discharge efficiency is as high as 99%.

The invention relates to the field of graphene sensors, and particularly discloses a preparation method of a sweat-erosion-resistant laser-induced graphene sensor, which comprises the following steps: firstly, locally heating laser-induced graphene coated with heat release glue by using 1064 nm laser, so that the laser-induced graphene is stripped from an original polyimide substrate and transferred to a target thermoplastic polyurethane flexible substrate; then using 355 nm laser to ionize mixed gas of inert gas and oxygen, generating plasma to bombard an interface of laser-induced graphene and polyurethane, and inducing covalent bonding between surface functional groups; and then spraying a polydimethylsiloxane-urea / silicon dioxide fluoride composite solution on the surface of the laser-induced graphene-polyurethane composite structure subjected to transfer printing and bonding, and sintering by adopting 532 nm laser to form the self-repairing super-hydrophobic packaging layer with a micro-nano mastoid structure. The problem of ion intercalation in sweat is solved, and the electrical stability, the interface bonding strength and the wear resistance of the sensor are remarkably improved.

The invention discloses a multi-cavity mesoporous carbon nanosphere battery material and a preparation method and application thereof, and belongs to the technical field of ion batteries, the method comprises the following steps: mixing a cosolvent and a surfactant, and stirring until the cosolvent and the surfactant are dissolved; adding a carbon source monomer, and stirring until dissolving; adding a pore-foaming agent, and stirring to form a suspension; and finally, adding a hydrogen bond catalyst, and after the stirring reaction is finished, washing, freeze-drying and carbonizing to obtain the multi-cavity mesoporous carbon nanosphere battery material. The problems of poor micelle stability and low repeatability of a traditional soft template method are solved through cooperative regulation and control of catalysis of the hydrogen bond catalyst and precise assembly time. By simply controlling the reaction time, a product with the multi-cavity structure reaching 65.3%-92.5% is stably and repeatedly prepared and far exceeds 31.7% of that of a non-catalytic system, and precise customization of the microstructure of the material is achieved. The multi-cavity structure can better buffer the volume change caused by sodium ion intercalation / deintercalation in the charging and discharging process, and is beneficial to maintaining the structural integrity of the electrode material.

The invention discloses a preparation method of an ammonium ion intercalation hydrated layered vanadium oxide and application of the ammonium ion intercalation hydrated layered vanadium oxide in a rechargeable zinc ion battery, the chemical composition of the hydrated layered vanadium oxide is (NH4) 0.4 V2O5.nH2O, and n is 0.01-2. The preparation method comprises the following steps: firstly, dispersing pentavalent vanadium source compounds (vanadium pentoxide and ammonium metavanadate) and ammonium radical-containing inorganic matters (ammonia water, (NH4) 2SO4, NH4NO3 and NH4Cl) into a mixed solution of water and an organic solvent; adjusting the pH value of the mixed solution to 1-5 by using a proper amount of acid solution (hydrochloric acid, sulfuric acid and nitric acid) to obtain a precursor solution; reacting the precursor solution at 90 to 200 DEG C for 5 to 20 hours, wherein the preferable reaction temperature is 120 to 140 DEG C; the preferable reaction time is 5 to 10 hours; and centrifuging or filtering, washing and drying to obtain the vanadium-based oxide. The preparation method is mild in reaction condition and simple in process; the obtained ammonium ion intercalation hydrated layered vanadium oxide is used as a positive electrode material to be applied to a zinc ion battery for the first time, and shows excellent cycling stability.

The present application discloses a lithium-supplementing additive, and a preparation method therefor and an application thereof. The lithium-supplementing additive comprises a granular lithium-supplementing material and also comprises lithium fluoride; moreover, the lithium fluoride is at least bonded to the surface of the lithium-supplementing material, and the lithium fluoride is generated by the reaction between an organic fluorine source and residual alkali contained in the lithium-supplementing material. The lithium-supplementing additive is high in purity, and a lithium fluoride coating layer at least bonded in situ to the surface of the lithium-supplementing material effectively achieves the effect of isolation and protection, so that it is ensured that the lithium-supplementing material is high in lithium-supplementing effect, storage performance and processing performance; moreover, the lithium fluoride improves the lithium-ion intercalation and deintercalation performance and the lithium-ion conductivity. In addition, the preparation method for a lithium-supplementing additive can ensure that a prepared lithium-supplementing additive is stable in structure and electrochemical performance, the efficiency is high, and the production cost is saved.

The invention discloses a vanadium positive electrode material with a high-stability crystal face structure and a preparation method thereof, and belongs to the technical field of zinc ion batteries, and the preparation method comprises the following steps: step S1, adding vanadium pentoxide powder into a beaker, then adding deionized water, stirring and mixing, then adding zinc sulfate and anthraquinone-2-sodium sulfonate, stirring and mixing, and then adding sodium hydroxide, stirring and mixing; finally adding hydrogen peroxide, stirring and mixing to obtain a modified solution; and S2, adding the modification solution into a reaction kettle, then adding the pretreated carbon cloth, immersing the pretreated carbon cloth into the modification solution, carrying out hydrothermal reaction, reducing the pressure, cooling to room temperature, washing with water for multiple times, and drying to obtain the vanadium positive electrode material with the high-stability crystal face structure, through pre-intercalation of zinc ions and synergistic anchoring of anthraquinone-2-sodium sulfonate, the ion migration rate of the positive electrode material is improved, meanwhile, a stable crystal space structure is formed, a wide-area and stable microscopic channel is provided in the ion intercalation-deintercalation process, and the zinc storage rate performance and the cycle stability are enhanced.

A Na2Ti7O15 doped Na2Ti3O7 sodium titanate electrode material, and a preparation method therefor and a use thereof. The electrode material has a porous block structure formed by stacking nanorods. The electrode material is synthesized by a simple solid-phase method, and is obtained by carrying out ball milling on precursors sodium carbonate and anatase-phase titanium dioxide in proportion, and then carrying out microwave sintering in air; the addition of Na2Ti7O15 increases the exposure of (100) sodium storage crystal face and decreases the exposure of (003) crystal face of Na2Ti3O7 sodium titanate; and Na2Ti7O15 has four TiO6 octahedrons in one structural unit, and has more sodium storage sites and wider sodium-ion diffusion channels, thereby improving the specific capacity and rate performance of the material. Upper and lower layers of TiO6 octahedrons in Na2Ti7O15 are connected to each other, such that the structure is more stable in a sodium-ion intercalation / deintercalation process, thereby improving the long cycle stability of the material.

The invention discloses a preparation method of transition metal ion modified bimetallic MXene, which comprises the following steps: preparing different metal ions (Co < 2 + >, Ni < 2 + > and Mn < 2 + >) and Mo2TiC2Tx materials (marked as Mo2TiC2Tx-M) with different intercalation concentrations through electrostatic interaction, and carrying out detailed characterization and analysis on the Mo2TiC2Tx materials to explore the feasibility of MXene material modification. By analyzing the phase and morphology of the prepared sample, the transition metal ion intercalation enables the structure of Mo2TiC2Tx to become looser, and meanwhile, the interlayer spacing of Mo2TiC2Tx is remarkably increased. By introducing metal ions, a new metal bond can be formed, and electrons can be efficiently transferred. The research on the electrochemical performance of the material finds that the bimetallic MXene of the metal ion intercalation has excellent electro-catalytic hydrogen evolution performance and good stability.

The present invention relates to a thermoelectric and hygroelectric power generation material based on a metal-phase molybdenum disulfide double-layer conductive fabric, a preparation method and an application thereof. Using metal-phase molybdenum disulfide as the base material, an ammonium ion intercalation hydrothermal method is used to in-situ grow a vertical array of 1T-phase molybdenum disulfide nanosheets on the surface of carbonized silk fibers to construct a p-type semiconductor, which provides abundant nano-channels for the efficient moisture absorption and flow of water, generating a high current density output; using a cotton fabric as the substrate, an n-type semiconductor is constructed by forming a 1T-phase molybdenum disulfide / titanium carbide van der Waals heterostructure on the surface of cotton fibers. The large specific surface area of the 1T-phase molybdenum disulfide / titanium carbide van der Waals heterostructure enables rapid electron migration. The present invention constructs a textile-based thermoelectric and hygroelectric generator through the orderly encapsulation of p-type 1T-phase molybdenum disulfide / carbonized silk, n-type 1T-phase molybdenum disulfide / titanium carbide-cotton fabric and aluminum electrodes, realizing the efficient collection and conversion of low-grade thermal energy and moisture energy, and can be applied to intelligent wearables, flexible sensing and energy conversion.

The invention relates to the technical field of preparation of a battery positive electrode material, in particular to a method for modifying a battery carbon-sulfur positive electrode material by using defect-free original graphene, which comprises primary coating, secondary coating and post-treatment. According to the method, defect-free original graphene coating modification is carried out on a carbon-sulfur positive electrode material of a liquid / solid lithium-sulfur battery, and ion intercalation lattice induced blocking of sulfur is completed through a nanocarbon secondary coating technology. Compared with the existing sulfur / sulfur-carbon positive electrode material, the specific capacity of the graphene sulfur-carbon positive electrode material prepared by the method disclosed by the invention is greatly increased and is close to a theoretical value, and the electrical conductivity and the heat-conducting property are greatly improved. The weight energy density and the volume density of the liquid / solid lithium-sulfur battery prepared by using the composite material are remarkably increased, the safety, the reliability and the like are far superior to those of the current lithium-sulfur battery of the same type, the operation of a battery management system is very facilitated, and the charge-discharge cycle index and the service life are remarkably improved. The method is simple to operate, convenient to prepare, short in production period and suitable for large-scale production.

The present invention belongs to the technical field of lithium batteries, and particularly relates to a high-rate lithium / carbon monofluoride primary battery electrolyte and its application. By using sodium salts and / or potassium salts, the present invention changes the discharge mechanism of Li / CF x batteries, playing a dual role in the ion intercalation reaction mechanism and the nucleation and growth of discharge products. Compared with solvated Li + , the desolvation energy of solvated Na + with the same structure is about 30% lower, which transforms the original desolvation and intercalation mechanism involving lithium salts throughout the process into an early reaction between sodium ions and fluoride ions, reducing the reaction energy barrier of the early electrochemical reaction. At the same time, in various solvents, the Stokes radius of K + is smaller than that of Li + , which means that the diffusion rate of K + is faster, which can not only reduce polarization but also increase the ion intercalation rate, achieving good rate performance. Finally, the present invention realizes an increase in the discharge specific capacity and specific power of the battery, without sacrificing the specific capacity and specific power due to the increase in the mass of non-active substances.

The utility model relates to a laminated core structure which comprises at least two negative pole pieces, at least one positive pole piece and at least one composite pole piece, the at least two negative pole pieces are sequentially arranged along the first direction; one positive pole piece is arranged between every two adjacent negative pole pieces, or one composite pole piece is arranged between every two adjacent negative pole pieces; the composite pole piece comprises a lithium piece and a polymer, and the high polymer coats the lithium sheet. In the laminated core structure, the lithium sheets can supplement lithium ions consumed by forming a solid electrolyte interface (SEI) film in the formation stage of the battery, so that the loss of active lithium is reduced, the initial coulombic efficiency of the battery is further improved, and the overall performance of the battery is enhanced; meanwhile, the polymer sheet also has a good elastic characteristic and can adapt to volume change caused by lithium ion intercalation and deintercalation in the charging and discharging process of the battery, so that the pressure on the shell is reduced, the deformation of the shell is effectively prevented, and the safety of the battery is improved.

The invention discloses a method for implementing atomic-scale regulation and control on platinum sites on TiO2 nanotubes and applying the platinum sites to light-driven methane dry reforming, provides a preparation method of a light-driven methane dry reforming catalytic material, and relates to implementation of atomic-scale precise regulation and control on the platinum sites on the TiO2 nanotubes. Therefore, two greenhouse gases, namely CO2 and CH4, are converted into synthesis gases (H2 and CO) under relatively mild conditions, and raw materials are provided for Fischer-Tropsch synthesis or preparation of chemicals with higher value. The preparation method comprises the following steps: by taking tubular sodium titanate obtained by alkalizing anatase as a substrate and tetraammineplatinum dichloride as a platinum source, carrying out ion exchange on positively charged platinum ammonia ions and substrate sodium ions by virtue of an electrostatic adsorption method, so that the platinum ammonia ions are embedded into the substrate; by controlling the calcination temperature and duration under different atmospheres, sodium titanate is promoted to be converted into TiO2, redundant ligands are effectively removed, and meanwhile precise regulation and control from Pt single atoms to Pt sub-nanocluster sites are achieved. The electronic metal-carrier interaction between the Pt site and the carrier induces local charge rearrangement, promotes directional adsorption and activation of CO2 and CH4 molecules at active sites, and shows excellent methane dry reforming activity and stability under xenon lamp simulated illumination and focused natural sunlight.

According to the polyquinone diazacyclo organic positive electrode material and the preparation method thereof, the organic positive electrode material can be applied to lithium ion, sodium ion, potassium ion and multivalent ion batteries, the synthesis method is simple, and large-scale preparation can be realized. According to the organic positive electrode material, quinone is used as a redox unit, a dinitrogen heterocyclic ring is used as a connecting structure, the prepared polymer has proper flexibility, a proper space is provided for intercalation / deintercalation, and good cycle performance is shown in a multivalent ion battery. According to the preparation method, 2, 5-halogenated-1, 4-benzoquinone derivatives and diazacyclo derivatives are used as reaction raw materials to carry out condensation reaction. Experiments prove that by taking the poly (2, 3, 5, 6-tetrachloro-1, 4-benzoquinone-imidazoline) positive electrode material as an example, in the application of the zinc ion battery, the capacity retention ratio is 82% after 250 cycles under the current density of 0.1 A g <-1 >.

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.

The invention relates to the technical field of preparation of inorganic nano materials, and discloses a preparation method of a single-layer 1T-phase transition metal chalcogenide quantum sheet material, which mainly comprises the following steps: preparing a transition metal chalcogenide nano powder material by adopting a common hydrothermal or solvothermal method; the preparation method comprises the following steps: preparing a suspension of 1T-phase chalcogenide by a method of combining ion intercalation with liquid phase stripping; and carrying out centrifugal purification on the dispersion liquid obtained by stripping to obtain a suspension of the single-layer 1T-phase chalcogenide quantum sheet material, and further, carrying out cleaning, drying and other steps to obtain the single-layer 1T-phase chalcogenide quantum sheet powder material. The process is simple, the cost is low, the single-layer 1T-phase chalcogenide quantum sheet material can be efficiently prepared, the specific surface area of the product is high, the electrochemical activity is high, and a two-dimensional quantum sheet material with the characteristics of high activity, high specific surface area and the like can be provided for application of various energy storage and energy conversion devices such as supercapacitors, ion batteries, catalysis and the like.

The invention relates to a method for producing partially reacted silicon for the control of the lithium intercalation capacity, for use in lithium batteries, wherein a first silicon layer is deposited on a substrate, the first silicon layer subsequently being subjected to rapid thermal processing. The invention also relates to an anode thereby produced. The problem addressed by the present invention of specifying a method that allows control of the capacity of ion intercalation into functional layers for battery production is solved in that a layer of silicon, metal and / or another material is applied as a diffusion barrier, which is subjected to subsequent rapid thermal processing, and partially reacted silicon is formed. (The structure of the diffusion barrier makes the diffusion barrier permeable to lithium.)

A battery and an electric apparatus. The battery comprises a positive electrode sheet and a negative electrode sheet, wherein the positive electrode sheet comprises a positive electrode active material layer, the positive electrode active material layer comprising a positive electrode active material and a lithium-supplementing agent, and the content of nickel in 1 mol of the positive electrode active material being 0.8 mol to 1 mol; and the negative electrode sheet comprises a negative electrode active material layer, the negative electrode active material layer comprising a negative electrode active material, and the negative electrode active material comprising a silicon-based material. The present application can improve the capacity of the battery and reduce the resistance to the intercalation of active metal ions during charging, thereby improving the energy density and fast-charging performance of the battery.

The present disclosure relates to the technical field of salt lake lithium extraction and recovery, and in particular to a method for extracting lithium from a salt lake by using a flow electrode, and a device for extracting lithium from a salt lake. By using a flow electrode slurry mixed with a lithium intercalation / deintercalation active material as a lithium ion electric deintercalation carrier, using a flow electrode slurry mixed with a calcium intercalation / deintercalation active material as a calcium ion electric deintercalation carrier, and incorporating an electrochemical principle, salt lake lithium extraction is carried out, and in the process of lithium intercalation, Ca2+ and Mg2+ generate a competitive effect when entering a flow electrode, so that magnesium ions do not easily enter a lithium-intercalated slurry by means of an ion exchange membrane, thereby inhibiting the intercalation of the magnesium ions into the lithium intercalation / deintercalation active material; and in a lithium intercalation / deintercalation system, the electrode potential of calcium ions is significantly different from that of lithium ions, so that the calcium ions cannot be intercalated into the lithium intercalation / deintercalation active material. Therefore, the method provided by the present disclosure can effectively separate lithium and magnesium, thereby improving the purity of recovered lithium.

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.