723 results about "Lithium compound" patented technology

The invention provides a lithium-rich manganese-based positive electrode active material and a preparation method and application thereof. The lithium-rich manganese-based positive electrode active material comprises a lithium-rich manganese-based core, a first coating layer and a second coating layer, the chemical formula of the lithium-rich manganese-based core is Li < 1 + x > Ni Mn M < c > O < 2 + x >; 0.25 < = x < = 0.4, a + b + c = 1, 0.33 < = a < = 0.35, 0.63 < = b < = 0.65, and 0 < = c < = 0.02; m is selected from at least one of W, Ta, Nb, Ti, Sb, Al, Mg, Zr, Sr and Mo; the first coating layer is X-doped nano layered lithium cobalt oxide, and X is selected from at least two of Al, La, Nb, Sr, Ti, Mn, Mo, Ta, W, K, B and F; and the second coating layer comprises a fast ion conductor and / or a spinel-like phase cobalt lithium compound. The positive electrode active material provided by the invention has excellent storage capacity.

The invention discloses a lithium supplement additive and a preparation method and application thereof. The lithium supplement additive comprises a lithium sulfinate compound, and the lithium sulfinate compound contains an electron withdrawing group. An electron withdrawing group contained in the lithium sulfinate compound in the lithium supplement additive can effectively change electron cloud distribution around sulfur atoms, so that the lithium sulfinate compound is endowed with relatively high lithium supplement capacity; meanwhile, due to the existence of the electron withdrawing group, the electron energy of the lowest unoccupied molecular orbital (LUMO) of the lithium sulfinate compound is reduced, and the energy gap between the highest occupied molecular orbital (HOMO) and the LUMO of the lithium sulfinate compound is reduced, so that the lithium supplement additive can be arranged in an electrode plate to exert the lithium supplement capacity and also can be used as an electrolyte additive; and the material can participate in electrode / electrolyte interface formation.

The invention relates to a modified current collector for a cathode-free metal battery and a preparation method and application thereof.The preparation method comprises the steps that an in-situ modification reaction is conducted on the surface of a copper current collector to obtain a current collector coated with a copper oxide nanometer material, and then selenium is introduced to the surface of the current collector coated with the copper oxide nanometer material through a partial in-situ substitution reaction to obtain the modified current collector coated with the copper oxide nanometer material. The preparation method comprises the following steps: preparing a copper selenide and copper oxide composite modified current collector, performing in-situ lithiation reaction through electrochemical deposition, and partially converting to generate corresponding lithiates, thereby obtaining the modified current collector for the non-anode metal battery. According to the invention, the functional artificial interface layer with lithium affinity, high stability and high ionic conductivity is constructed on the surface of the copper-based current collector in situ, so that the key problems of uneven metal deposition and unstable SEI layer on the surface of the negative electrode current collector in the current research of the metal secondary battery without the negative electrode are solved, the formation of dendritic crystals and the occurrence of side reactions are inhibited, and the service life of the metal secondary battery is prolonged. Therefore, the coulombic efficiency, the safety and the cycle life of the battery are improved.

The invention relates to the field of lithium ion batteries, and discloses a positive electrode lithium supplement additive, a preparation method thereof, a positive plate and a lithium ion battery. The lithium supplement additive for the positive electrode comprises a lithium-containing compound, and a first coating layer and a second coating layer which sequentially coat the surface of the lithium-containing compound, wherein the first coating layer comprises at least one of lithium aluminum titanium phosphate, lithium lanthanum zirconium oxide and lithium lanthanum titanium oxide; the second coating layer includes at least one of a Ga-containing compound, a Sm-containing compound, a Si-containing compound, an Al-containing compound, a V-containing compound, a Nb-containing compound, a Mg-containing compound, a Zr-containing compound, and a Zn-containing compound. The first coating layer improves the stability in the processing process, prevents side reaction, ensures the structural stability of the positive electrode lithium supplement additive, and improves the cycle performance of the battery; and the second coating layer provides an effective smooth channel for lithium ions, so that the impedance of the battery can be effectively reduced, and the capacity and the cycle performance of the battery are improved.

A method including pretreating ground lithium-containing ceramics to form alkali coated ceramics, leaching the alkali coated ceramics to form a leachate comprising a filtrate and a solid residue, preferentially extracting lithium from the filtrate to form a lithium rich solution and a raffinate, precipitating a crude lithium carbonate from the lithium rich solution and purifying the crude lithium carbonate to produce a battery grade lithium carbonate. A method including leaching a slurry comprising lithium-containing ceramics, water, a strong base, and an alkaline earth metal oxide / hydroxide at a pressure ranging from 0 to 1450 psi and at a temperature ranging from 100 to 500°C to form a leached slurry comprising a liquid filtrate and a solid residue, processing the liquid filtrate to recover a lithium-rich organic solution, and processing the lithium-rich organic solution to produce a battery-grade lithium compound and sodium sulfate.

The invention relates to the technical field of lithium ion batteries, in particular to a lithium-doped silicon-carbon composite material, a preparation method thereof, a negative plate and a lithium ion battery. The preparation method of the lithium-doped silicon-carbon composite material comprises the following steps: carrying out reduction reaction and activated pore-forming on a mixed material containing a carbon source, an organic pore-forming agent, a lithium supplement agent and a reducing agent to obtain lithium-doped porous carbon; performing first deposition on the lithium-doped porous carbon and mixed gas containing an inorganic lithium compound and an organic lithium compound; carrying out second deposition on the material obtained after the first deposition and silane gas to obtain a lithium compound doped silicon carbon precursor material; and mixing the lithium compound doped silicon carbon precursor material, an organic metal compound, asphalt and an organic solvent, performing spray drying, and then performing carbonization. According to the preparation method, the initial efficiency and the power performance of the silicon-carbon composite material can be improved.

The invention relates to the technical field of sodium batteries, in particular to a sodium ion battery positive electrode and a preparation method and application thereof. A lithium-containing compound or a potassium-containing compound is added into the positive electrode, compared with a sodium-containing compound, due to the fact that the Na < + > / Na standard hydrogen reduction potential is-2.71 V, the Na < + > / Na standard hydrogen reduction potential is-3.04 V higher than the Li < + > / Li standard hydrogen reduction potential, and the K < + > / K standard hydrogen reduction potential is-2.97 V higher than the sodium-containing compound, when the sodium-ion battery is charged to the high voltage of 4.1 V, the lithium-containing compound or the potassium-containing compound of the positive electrode is oxidized and decomposed; a certain amount of lithium ions or potassium ions enter the electrolyte, and meanwhile, a certain amount of sodium ions in the electrolyte participate in a negative electrode reaction to achieve the purpose of supplementing sodium; lithium ions and potassium ions do not generate dendritic crystals in a sodium-ion battery system, and are in an electrolyte in an ion form, so that the SEI of a negative electrode is improved; the sodium-ion battery positive electrode is compatible with the current sodium-ion battery process technology, and can supplement sodium, improve a negative electrode SEI film and improve the cycle stability of the battery at the same time.

The invention provides a PEO-based composite solid electrolyte membrane, a preparation method thereof and a solid-state battery. The PEO-based composite solid electrolyte membrane comprises a low-entropy multi-element doped lithium compound, PEO and a lithium-based electrolyte, wherein the chemical formula of the low-entropy multi-element doped lithium compound is Li < 8 > Ge < 1 / 3 > Pb < 1 / 3 > Sn < 1 / 3 > O < 6 >. The PEO-based composite solid-state electrolyte membrane has excellent ionic conductivity and structural stability, and has excellent cycle reversibility and electrochemical performance when being used for a solid-state battery.

The invention discloses a lithium iron manganese phosphate positive electrode material and a preparation method thereof, and belongs to the technical field of lithium ion batteries, the lithium iron manganese phosphate positive electrode material at least comprises lithium iron manganese phosphate particles and a coating layer coating the lithium iron manganese phosphate particles; the raw material of the coating layer comprises an aluminum fluoride embedded poly (ethylenedioxythiophene)-lithium polystyrene sulfonate compound. And the coating layer can be used as a physical barrier to form dynamic interface protection, so that dissolution of manganese and erosion of electrolyte are directly inhibited, and side reaction between the electrolyte and the positive electrode material is reduced. Meanwhile, a more flexible transmission channel is provided for lithium ions and electrons, the conductivity of the positive electrode material is enhanced while the transmission efficiency of the lithium ions is improved, and the lithium manganese iron phosphate positive electrode material with stable structure, high rate capability and cycling stability is obtained.

The invention provides a lithium supplement material and a preparation method thereof, a positive pole piece and a lithium ion battery, and belongs to the technical field of batteries. The lithium supplementing material comprises an inner core and a carbon coating layer coating at least part of the surface of the inner core, the inner core comprises a lithium supplementing agent, and the lithium supplementing agent comprises a transition metal element and a lithium-containing compound; and the carbon coating layer is provided with holes. The lithium supplementing material disclosed by the invention has relatively low decomposition voltage, lithium ions of the positive electrode material can be separated and participate in formation of an SEI (Solid Electrolyte Interface) film during first-time charging, and the consumption of the lithium ions of the positive electrode material in the process of participating in formation of the SEI film is reduced, so that the first-time charging and discharging efficiency of the battery is improved; in addition, the positive electrode can provide more lithium ions to participate in electrochemical reaction, so that the mass energy density of the battery can be improved.

The invention provides a silicon-based material and a preparation method thereof, a negative pole piece and a solid-state battery. The silicon-based material comprises an inner core and a surface coating layer, the inner core comprises a silicon-based negative electrode material, the surface coating layer is a carbon fluoride layer, the carbon fluoride layer internally comprises Li-M, LiF and LiX, M represents a metal element and is selected from at least one of Ag, Mg, Zn and Al, and X represents a non-metal element and is selected from at least one of N, S and P. The silicon-based negative electrode material is used as a core, the surface of the silicon-based negative electrode material is coated with the carbon fluoride layer, and the Li-M alloy / LiF / LiX composite lithium compound is introduced into the carbon fluoride layer, so that triple effects of ion-electron double-conduction network construction, interface chemical stabilization and mechanical buffer enhancement are achieved; and the chemical stability of an interface between the silicon negative electrode and sulfide solid electrolyte is improved while the rate capability of the negative electrode is improved and the expansion and shrinkage of the silicon negative electrode are relieved, and the cycling stability is improved.

The invention discloses a porous carbon-coated graphite composite material for an energy storage battery and a preparation method of the porous carbon-coated graphite composite material. The porous carbon-coated graphite composite material consists of inner core graphite and lithium heteroatom-doped porous carbon coated on the surface of the inner core graphite, the preparation method comprises the following steps: preparing an organic template agent solution, adding resin and an amino organic lithium compound, uniformly mixing, adding a hydrogen peroxide oxidizing agent, reacting, filtering, and activating at high temperature to obtain lithium-doped porous carbon; the preparation method comprises the following steps: adding lithium-doped porous carbon into an organic solvent, then adding graphite and an organic aluminum-based compound, uniformly dispersing, dropwise adding an amino solution, carrying out chemical reaction at the temperature of 50-120 DEG C, filtering, and carrying out vacuum drying and high-temperature carbonization on obtained filter residues to obtain the lithium-doped porous carbon composite material. The cycle performance and the storage performance of the graphite can be improved.

The invention provides a silicon negative electrode material, a preparation method and a lithium ion battery, and relates to the technical field of battery negative electrode materials. Stable lithium compound nano-particles are deposited or converted on the inner wall of porous carbon, silicon or silicon oxide or silicon-lithium alloy is induced to form nano-particles in the vapor deposition process, and the nano-particles are distributed with the lithium compound nano-particles as the center. The lithium compound has a high boiling point, can stably provide crystallization sites for silicon during vapor deposition, and prevents agglomeration of silicon nanoparticles; the inorganic lithium compound is a lithium ion conductor, has high mechanical strength, can improve the dynamics of the silicon negative electrode during lithium intercalation and deintercalation, and slows down the expansion of the silicon negative electrode.

To provide a method for yielding a lithium-containing liquid suitable as a raw material for producing lithium compounds of high purity, from to-be-treated water containing lithium ions, sodium ions, metal ions other than lithium ions and sodium ions, fluoride ions, and anions serving as conjugate bases of acids, and to provide related techniques thereof.SOLUTION: Provided is a method for producing a raw material liquid for a lithium compound, comprising: step 1 of adding a sulfiding agent and a calcium compound to the to-be-treated water, subjecting the to-be-treated water containing the formed solid matter to solid-liquid separation to obtain a treated liquid A; step 2 of adding an oxalate ion source to the treated liquid A, subjecting the treated liquid A containing the formed solid matter to solid-liquid separation to obtain a treated liquid B; and step 3 of subjecting the treated liquid B to bipolar electrodialysis to obtain an alkaline liquid containing lithium ions and sodium ions as a raw material liquid for producing a lithium compound.SELECTED DRAWING: None

The invention relates to a preparation method of a lanthanum-doped lithium borate coated LATP solid electrolyte, which comprises the following steps: S1, mixing a lithium source, an aluminum source, a lanthanum source, a titanium source and a phosphorus source, putting the mixed material into a dispersing agent, putting into a constant-temperature water bath stirrer, and heating and stirring until the mixture is completely dried to obtain a mixed raw material; s2, performing high-temperature primary sintering on the mixed raw material in an air atmosphere to obtain a composite oxide; s3, performing crushing treatment on a composite oxide, adding lithium borate, and performing uniform mixing to obtain a mixture; the mass ratio of the lithium-containing compound to the composite oxide is (0.01-0.05): 1; and S4, tabletting the mixture, and carrying out high-temperature secondary sintering in an air atmosphere to obtain the finished product lithium titanium aluminum phosphate material. The problems that in an existing scheme, the final calcination temperature of a solid electrolyte is generally up to 1100 DEG C or above, high energy consumption is likely to be caused, meanwhile, Li loss is caused, non-conductive AlPO4 is introduced, the crystal structure is unstable, the powder sintering performance is poor, and the ionic conductivity is reduced are solved.

A coated cathode material for lithium-ion batteries is disclosed. Methods and systems are further provided for applying a coating to an active cathode material for use in a lithium-ion battery. In one example, the coated cathode material may include a high-nickel content active cathode material, such as lithium nickel manganese cobalt oxide or lithium nickel aluminum cobalt oxide, coated with a coating including one or more high energy density active materials, such as lithium vanadium fluorophosphate and / or a lithium iron manganese phosphate compound. In some examples, the high-nickel content active cathode material may include greater than or equal to 60% nickel content.

The invention discloses a spodumene concentrate resourceful treatment method which comprises the following steps: carrying out wet treatment on spodumene acid clinker to prepare lithium-removed filter residues and leachate; carrying out neutralization treatment and desulfurization treatment on the leachate to obtain a lithium-containing purified solution, gypsum and iron oxide red, and carrying out lithium extraction treatment on the lithium-containing purified solution to obtain a lithium salt and mirabilite; the lithium-removed filter residues are treated through a process combining a beneficiation method and a chemical method, and water glass, nano kaolinite, ceramsite aggregate and tantalum-niobium concentrate are obtained. According to the method, whole-process slag-free production of the spodumene concentrate is achieved, and meanwhile the lithium-containing compound with the high purity and the high quality is obtained; and various valuable products can be obtained.

The invention discloses a method for preparing a battery-grade lithium compound. The method comprises the following steps: S1, carrying out sulfuric acid acidification reaction on a lithium-containing raw material or roasting by adding sulfate, and carrying out water leaching to obtain leached slurry; the lithium-containing raw material is a lithium mineral or a waste lithium battery material; s2, calcium oxide or calcium hydroxide is added into the leaching slurry, filtering is performed after full reaction, filtrate A and filter residues A are obtained, the main component of the filtrate A is lithium hydroxide, and the filtrate A further comprises soluble impurities formed after water leaching; s3, adding a substance for removing calcium ions into the filtrate A, fully reacting, and filtering to obtain filtrate B and filter residues B; s4, fully contacting the filtrate B with an extracting agent for extraction, and then separating to obtain a loaded organic phase and raffinate; s5, reversely extracting the loaded organic phase to obtain a lithium solution and a blank organic phase; and S6, further treating the lithium solution to obtain the battery-grade lithium compound. Sodium ions are basically not introduced, the energy consumption is low, the process is simplified, the product quality is high, the production cost is low, the lithium yield is high, and byproducts are convenient to treat.

The invention belongs to the technical field of battery materials, and provides a sulfide solid electrolyte composite material, a structural energy storage integrated lithium ion battery and a preparation method thereof. The sulfide solid electrolyte composite material comprises an inner core and a coating layer, the surface of the inner core is coated with the coating layer, the inner core is a sulfide solid electrolyte, and the coating layer is an oxygen-containing lithium compound; the species of oxygen-containing lithium compounds are defined. The sulfide solid electrolyte is coated with at least two oxygen-containing lithium compounds, and the oxygen-containing lithium compounds are compatible with the sulfide solid electrolyte in the heat treatment process, so that the air stability and the oxidation resistance of the electrolyte are remarkably improved; a solution method coating and calcining process is adopted, so that a coating layer is uniformly dispersed, and the stability of the composite material is improved; the sulfide solid electrolyte composite material, a carbon fiber electrode and a glass fiber woven cloth diaphragm are assembled into the structural energy storage integrated lithium ion battery, the lithium ion battery has excellent specific capacity, cycling stability and rate capability, and the service life is prolonged.

The invention discloses a high-voltage lithium nickel manganese oxide positive electrode material and a preparation method thereof, a battery positive electrode and a battery, and belongs to the technical field of lithium ion battery materials. Comprising an inner core composed of a lithium-containing compound, the inner core is coated with a shell composed of tungstate, and a transition layer is arranged between the inner core and the shell. The tungstate has good chemical and thermodynamic stability, can prevent erosion of HF in the electrolyte, inhibit dissolution of transition metal, reduce the shuttle effect, and can greatly improve the capacity retention rate of the battery. The preparation method is simple in process steps and convenient for large-scale preparation. Meanwhile, the cathode material coated with magnesium tungstate, calcium tungstate or bismuth tungstate has good dynamic performance, the capacity and the rate capability are remarkably improved, meanwhile, the stability of the material is also remarkably improved, and a good application way is provided for application of the high-voltage type lithium nickel manganese oxide cathode.

The invention provides a solid-state battery with high safety, flame retardance and long cycle performance and a production method thereof, and the production method comprises the following steps: mixing 1, 3-dioxolame, an initiator, a flame retardant, a lithium salt and a solvent to form an electrolyte for later use; the method comprises the following steps: uniformly mixing various lithium compounds, a conductive agent and a binder to form slurry, coating the slurry on an aluminum foil with a protective film, drying to obtain a positive plate, and processing the positive plate and a negative plate through a lamination or winding process to prepare a battery core; a part of the electrolyte solution is injected into the battery core, the humidity is controlled within 20% RH, the pressure is controlled within 1-3 MPa, standing is carried out for 5-8 h at the specific temperature below 60 DEG C to form a first layer of gel, a second layer of electrolyte is added after standing is carried out for 5 h, and then high-temperature treatment, hot pressing and standing are carried out to obtain the solid-state battery. The solid-state battery provided by the invention has relatively high safety and long cycle stability.

The invention relates to an asphalt-based silicon-carbon composite material, a preparation method thereof and a lithium ion battery. The preparation method comprises the following steps: providing pitch coke, sodium hydroxide and lithium carbonate, uniformly mixing the raw materials, calcining in a nitrogen atmosphere, sequentially washing with mixed acid and deionized water after calcining, and carrying out vacuum drying to obtain pitch-based porous carbon; adding the pitch-based porous carbon into a vacuum furnace, and respectively introducing heteroatom gas, silane gas and metal compound gas in stages to obtain a metal-doped silicon-carbon precursor material; and heating the metal-doped silicon-carbon precursor material, introducing oxidizing mixed gas for passivation, soaking the passivated metal-doped silicon-carbon precursor material in an organic solvent of an organic lithium compound, uniformly mixing, and carrying out spray drying to realize secondary coating, thereby obtaining the asphalt-based silicon-carbon composite material. The asphalt-based silicon-carbon composite material has a three-layer core-shell structure, so that the stability and the performance of the material are improved, and the first efficiency and the power performance of the material can be improved.

The invention provides a lithium manganese iron phosphate positive electrode material, a preparation method thereof and a lithium ion battery. The lithium manganese iron phosphate positive electrode material comprises a lithium manganese iron phosphate inner core and a carbon coating layer coating the surface of the lithium manganese iron phosphate inner core; and a lithium-containing compound and a sulfur-containing compound are doped in the carbon coating layer. The lithium manganese iron phosphate positive electrode material provided by the invention is high in electronic conductivity and higher in lithium ion diffusion rate, and moreover, the dissolution of manganous ions is reduced, and the structural stability is maintained, so that the capacity, the cycle performance and the rate performance of a battery are improved.

A lithium iron phosphate / carbon / lithium-rich lithium iron oxide composite cathode material and a preparation method and an application thereof are provided. The preparation method includes the following steps: mixing iron salt, lithium compound, orthophosphate and an organic salt with water, to obtain a mixed slurry; performing a spray granulation on the mixed slurry, to obtain a precursor powder; and performing a heat preservation on the precursor powder in a protective atmosphere, to obtain a lithium iron phosphate / carbon / lithium-rich lithium iron oxide composite cathode material. The preparation method is based on the characteristics that electric double layer physical energy storage of porous carbon can enhance the rate, and lithium-rich lithium iron oxide additive can increase the system lithium source and prolong the service life, combined with the synthesis process of lithium iron phosphate and lithium-rich lithium iron oxide, a lithium iron phosphate / carbon / lithium-rich lithium iron oxide composite cathode material is synthesized by one-step method.

A positive electrode active material for a rechargeable lithium battery, a positive electrode including the positive electrode active material, and a rechargeable lithium battery including the positive electrode are disclosed. The positive electrode active material includes first particles comprising a compound of Lia1Fex1B1y1PO4-b1 and having a first average particle diameter, and second particles comprising a compound of Lia2Nix2COy2Mnz2Xc2O2-b2 and having a second average particle diameter that is greater than the first average particle diameter. The content (e.g., amount) of the first particles is greater than the content (e.g., amount) of the second particles in the positive electrode active material.

The present invention relates to the technical field of lithium-ion batteries. Disclosed are a lithium manganese iron phosphate positive electrode material and a preparation method therefor. The preparation method comprises: uniformly mixing raw materials with a solvent to obtain a primary mixture, wherein the raw materials include a phosphorus-containing compound, a manganese-containing compound, an iron-containing compound, a lithium-containing compound, and a carbon-containing compound; performing primary pretreatment and primary sintering on the primary mixture to obtain a primary sintered material; uniformly mixing the primary sintered material, an additive, and a solvent to obtain a secondary mixture, wherein the additive contains the element phosphorus; performing secondary pretreatment and secondary sintering on the secondary mixture to obtain a secondary sintered material, wherein the secondary sintering enables the phosphorus in the additive to be distributed on the surface of particles of the secondary sintered material to form a phosphorus-rich shell layer; and performing post-treatment on the secondary sintered material to obtain the lithium manganese iron phosphate positive electrode material. The present invention can reduce the powder resistivity of the positive electrode material, so that the attenuation rate of a voltage platform in the cycling process is slowed down, and the cycle life of the lithium manganese iron phosphate positive electrode material is prolonged.

The invention provides a composite oxide solid electrolyte sheet and a preparation method and application thereof. The preparation method comprises the following steps: pressing oxide solid electrolyte powder into a sheet, and performing first calcination to obtain an oxide solid electrolyte sheet; placing the oxide solid electrolyte sheet in the reaction solution, and heating for reaction; the reaction solution comprises a lithium-containing compound and an aluminum-containing compound; and carrying out second calcination on the reacted oxide solid electrolyte sheet to obtain the composite oxide solid electrolyte sheet with the surface coated with the lithium metaaluminate layer. The technical problems to be solved are how to enable the composite oxide solid electrolyte sheet to be low in grain boundary impedance and high in ionic conductivity, improve the stability of the oxide solid electrolyte to lithium, improve the compatibility of the oxide solid electrolyte and a pole piece and reduce the contact impedance. When the composite oxide solid electrolyte sheet is applied to an all-solid-state battery or a semi-solid-state battery, the all-solid-state battery or the semi-solid-state battery has relatively good rate capability and cycle performance.

The invention discloses a diaphragm and a preparation method thereof, a battery and a power utilization device, the diaphragm comprises a porous base membrane and a coating, and the coating is arranged on at least one surface of the porous base membrane; the coating comprises an oxide solid electrolyte and a lithium supplement additive; the oxide solid electrolyte comprises at least one of a sodium fast ion conductor type solid electrolyte, a garnet type solid electrolyte and a perovskite type solid electrolyte; the lithium supplement additive comprises a compound formed by a binary lithium-containing compound and a transition metal. Therefore, the diaphragm disclosed by the invention has excellent electrolyte affinity and electrolyte retention capability, can reduce interface impedance and reduce concentration polarization in the battery, and can promote ion transmission and improve the overall performance of the battery at the same time; in addition, the diaphragm can release lithium ions in the first-circle charging and discharging process, and the loss in the SEI film generation process is supplemented.

The invention provides a boron deposition mass calculation method and equipment of a reactor and a storage medium, and relates to the technical field of nuclear reactors. The method for calculating the boron deposition mass of the reactor provided by the invention comprises the following steps: calculating the deposition mass of a boron-lithium compound in dirt; calculating the boron adsorption mass of the dirt surface; and summing the boron lithium compound deposition mass and the boron adsorption mass to obtain the boron deposition mass. According to the method, two boron deposition mechanisms of boron lithium compound deposition and boron adsorption are considered, the total boron deposition mass is calculated in combination with the two deposition mechanisms, the boron deposition mass of the reactor is calculated, and the calculation result is more accurate.

The invention discloses a resource recycling method of waste lithium iron phosphate batteries, which comprises the following steps: mixing lithium iron phosphate black powder and a chlorinating agent, and performing chlorination separation roasting to obtain roasted sand and flue gas; and the roasted product is subjected to leaching treatment, and flue gas is subjected to defluorination and dechlorination treatment through a semi-dry method. According to the recycling method, the chlorinating agent is introduced for chlorination separation roasting, phosphorus in lithium iron phosphate reacts with the chlorinating agent to generate a phosphorus-containing compound phase, high-temperature reduction conversion of iron is achieved through graphene / carbon black in the black powder, and a magnetite phase is formed; a phosphorus-containing compound phase and a magnetite phase generated in the chlorination segregation roasting process are subjected to high-temperature segregation, and lithium exists in the form of a lithium-containing compound. And the roasted sand and the flue gas are treated at the same time, so that various recycled products can be obtained, the emission of the flue gas is reduced, and the high-value recycling purpose is achieved.