261 results about "Capacity loss" patented technology

The invention relates to the technical field of energy scheduling, and discloses a smart city energy dynamic scheduling system and method based on big data analysis, and the method comprises the following steps: the operation state of a transformer substation, the basic parameters of a charging pile and regional load prediction data are collected in real time, data cleaning and abnormal value filtering are carried out; constructing a complete power grid-charging facility dynamic information base; calculating the power supply margin of each region based on the capacity loss of the faulty transformer substation, establishing a weight scoring system of charging pile power adjustment in combination with the charging demand urgency, and determining the reduction or recovery priority of each charging load; and generating a charging pile power adjustment instruction through a multi-target optimization model, and iteratively correcting a power distribution scheme and generating a final scheduling instruction set by taking minimization of user satisfaction loss as a target while meeting the power grid capacity. According to the invention, by constructing a dynamic response mechanism and a multi-target collaborative optimization model, accurate and rapid regulation and control of the traffic load are realized in the scene of sudden power shortage of the power grid.

The invention discloses a battery safety risk grade early warning and evaluation method, and relates to the technical field of lithium ion batteries, and the method comprises the steps: collecting battery operation data, carrying out the processing to obtain a capacity attenuation characteristic and an internal resistance growth characteristic, and obtaining a degradation characteristic parameter related to the temperature through an Arrhenius model; estimating capacity loss trends at different temperatures and time; inputting the multi-source time sequence data into a long short-term memory network, and predicting the capacity and internal resistance change of a plurality of cycles in the future; and in combination with a life end criterion, calculating the remaining service life, fusing the remaining service life with the degradation index of the aging model and the degradation index of the capacity model, generating a safety state index, and outputting a battery safety risk grade and corresponding early warning information. According to the invention, overall safety risk assessment can be provided for the whole battery system, accurate monitoring and early warning can be carried out on the single batteries or local modules, and the safety and reliability of battery operation can be improved.

The invention discloses a battery capacity loss real-time prediction method based on Arrhenius-LSTM, and the method comprises the steps: S1, collecting the current, voltage, state of charge and temperature data of a vehicle-mounted battery management system, and generating an original time series data set; s2, performing time alignment and capacity calculation on the original time sequence data set to generate a capacity loss sequence; s3, an Arrhenius Arrhenius model is constructed based on the capacity loss sequence, and a physical baseline prediction sequence is generated through temperature related parameter estimation; s4, calculating a difference value between the capacity loss sequence and the physical baseline prediction sequence, and generating a residual sequence; s5, performing feature extraction and time sequence window construction on the residual error sequence to generate an LSTM training data set; s6, inputting the LSTM training data set into the long short-term memory network for training, and generating a residual prediction model; and S7, adding the physical baseline prediction sequence and the output of the residual prediction model to generate a capacity loss prediction result. And the online monitoring and early warning functions of the health state of the battery are realized.

The invention provides a motor controller heating system, a control method thereof and a vehicle, and relates to the technical field of vehicle control, and the method comprises the steps: controlling the conduction states of a first switch module, a second switch module, a third switch module and an inverter, the energy storage element, the inverter, the two-phase winding in the three-phase motor and the power battery are connected in sequence to form a charging and discharging loop of the power battery; obtaining a target current and a target voltage of the power battery, a phase current of a first phase winding in the three-phase motor and a current voltage of the power battery; according to the target current, the target voltage, the current voltage and the phase current, the duty ratio of a control pulse of a first phase bridge arm in an inverter connected with the first phase winding is obtained, the first phase bridge arm is controlled according to the duty ratio so as to adjust the current of a charging and discharging loop, mutual charging and discharging between a power battery and an energy storage element can be achieved, and the charging and discharging efficiency is improved. The heating capacity of the power battery is improved, the capacity loss is reduced, and the current can be accurately controlled.

The invention provides a battery prediction and early warning method and device, and the method can obtain an actually measured expansive force curve of a lithium iron phosphate battery in a charging process, and respectively determines a maximum expansive force value of the actually measured expansive force curve at SOC = about 30% and a maximum expansive force value of the actually measured expansive force curve at SOC = about 100%. And carrying out capacity loss prediction and / or sharp degradation judgment on the lithium iron phosphate battery according to the actual pressure difference between the two expansive forces and a pre-constructed capacity loss model. Therefore, capacity loss prediction and / or rapid degradation early warning can be realized by using the size relationship between the two expansion force peak values and the pressure difference in the charging process based on the charging and discharging platform characteristics of the lithium iron phosphate battery, so that the accuracy of prediction and early warning can be improved.

The invention belongs to the technical field of battery material synthesis, and discloses a sodium ion battery hard carbon negative electrode material, a preparation method of the sodium ion battery hard carbon negative electrode material, a negative electrode and a sodium ion battery. Unsaturated oxygen-containing sites of the hard carbon material are eliminated through calcination under the low-temperature (500-700 DEG C) condition, and the first-circle irreversible capacity loss is reduced; meanwhile, a sodium polyphosphate coating layer is formed in situ, so that the diffusion rate of sodium ions is increased. According to the method, surface modification and coating of the hard carbon material are achieved in one step, the first-week coulombic efficiency of the obtained hard carbon negative electrode material is larger than 89.4%, and the capacity retention rate gt after 200 times of circulation under 200 mA. G <-1 > is achieved; and the rate capability is excellent. The method is simple and controllable in process, low in raw material cost, environment-friendly and suitable for large-scale production.

The invention provides a sulfinate organic positive alkali metal ion supplement for a secondary battery, and relates to the technical field of secondary batteries. The organic positive electrode alkali metal ion supplement has a structure as shown in the following general formula: [R-SO2]-M < + >, wherein M < + > is a metal cation and is selected from at least one of Li < + >, Na < + > and K < + >; [R-SO2]-is a sulfinate anion, and wherein R is an organic group. The supplement compensates irreversible capacity loss by efficiently releasing active ions, so that the energy density of the battery is improved; the oxidation potential is proper, the environmental stability is excellent, and the catalyst is not needed to decompose and easy to process; decomposition products are harmless, an electrode interface can be optimized, and the cycle life of the battery is remarkably prolonged.

The invention belongs to the technical field of preparation of sodium ion battery electrode materials, and provides a high-performance sodium storage material based on Zn-doped modified P2 type sodium nickel manganese oxide, a preparation method and a battery. The invention aims to solve the problems of rapid capacity attenuation under high voltage, obvious volume change in the phase change process, irreversible capacity loss and the like of the existing P2 type sodium nickel manganese oxide material. According to the main technical scheme, through low-concentration Zn doping, the structural stability of the material is optimized, and the electrochemical performance of the material is improved on the premise that voltage, capacity and energy density are not sacrificed. The preparation method comprises the following steps: dissolving a sodium source, a manganese source, a nickel source and a zinc source, adding a complexing agent for reaction, evaporating the solvent to dryness, and performing two-stage calcination to finally obtain the zinc-doped sodium-nickel-manganese oxide with the P2 type layered structure. The material can be used for high-safety sodium ion battery positive electrodes and is widely applied to the fields of energy storage power stations, low-speed electric vehicles and the like.

The invention provides a battery life prediction method, apparatus and device, and a medium, and relates to the technical field of batteries, the method comprises the following steps: obtaining a first historical data set and a second historical data set of a to-be-detected battery within a preset historical time; obtaining a storage capacity loss model, determining to-be-tested parameters of the storage capacity loss model based on the first historical data set, and obtaining a target storage capacity loss model; obtaining a cycle capacity loss model, determining to-be-measured parameters of the cycle capacity loss model based on the second historical data set, and obtaining a target cycle capacity loss model; determining an actual capacity loss model according to the target storage capacity loss model and the target cyclic capacity loss model; determining an actual capacity loss curve according to the actual capacity loss model; and determining the actual battery life of the to-be-tested battery according to the actual capacity loss curve. The prediction accuracy of the battery life is improved.

The invention discloses a ternary positive electrode material as well as a preparation method and application thereof, and belongs to the technical field of lithium ion batteries. The method comprises the following steps: modifying a ternary matrix material in a composite doping manner of rare earth elements and transition metals, and then coating the surface of the material with a layer of amorphous ferric fluoride in a manner of combining atomic layer deposition with fluorination reaction. The ternary positive electrode material provided by the invention has higher rate capability and better cycling stability, and can maintain better chemical performance under high current density, so that the problems of capacity loss and poor electrical performance of the ternary positive electrode material of the lithium battery in a high-voltage long-cycle process are greatly relieved.

The invention provides a method suitable for rapidly evaluating the aging state of a large-scale energy storage power station battery, and belongs to the technical field of battery state evaluation. According to the method, data acquisition is carried out during battery standing, two subsequent interval voltages of standing initial voltage are recorded, equivalent capacity loss instantaneous values at different moments are calculated in combination with a calibration proportionality coefficient and a working condition correction factor, a voltage relaxation integral area is obtained through calculation, and then a health state assessment result and confidence are obtained; the technical means of synchronously collecting the temperature change rate and the internal resistance change value, dynamically allocating weight fusion calculation, and performing evaluation in parallel in the whole station to generate an aging state distribution diagram and an abnormal alarm are adopted, and the method is adaptive to an existing energy storage power station monitoring system, does not need additional transformation, avoids voltage fluctuation to obtain high-quality data, comprehensively represents the battery polarization state, and improves the quality of the battery. The problems that large-scale energy storage power station battery evaluation is low in efficiency, insufficient in precision and lack of a global view angle are solved.

The invention belongs to the field of lithium ion batteries, and discloses a ZIF-67-derived composite lithium oxalate lithium supplement agent and a preparation method and application thereof.The lithium supplement agent comprises a lithium oxalate matrix and a ZIF-67-derived Co-based catalyst, and the ZIF-67-derived Co-based catalyst is evenly distributed on the surfaces of lithium oxalate particles or among crystals to form a composite structure; a water-phase synthesis method is adopted for preparation, ZIF-67 is converted into Co-based nano-particles, the Co-based nano-particles and lithium oxalate particles form a composite structure, the Co-based nano-particles can serve as a positive electrode additive to be applied to a positive electrode of a lithium ion battery, in-situ thermal decomposition / electrolytic reaction occurs in the first charging process of the battery, Li is released to compensate irreversible capacity loss, the decomposition potential can be reduced to 4.0 V or below, and the positive electrode additive can be applied to the positive electrode of the lithium ion battery. The first-time charging efficiency is improved to 90% or above, and the cycling stability is remarkably enhanced.

The invention discloses a niobium-doped and carbon nanotube continuously coated lithium iron nickel phosphate material and a preparation method thereof, and belongs to the technical field of lithium ion battery positive electrode materials. The niobium source and the phosphorus source are added step by step, the concentration gradient distribution of the niobium element in the material is realized, and niobium is preferentially doped in the [100] crystal orientation through three-section temperature control sintering, so that the bulk phase conductivity and the lithium ion mobility are remarkably improved, and the capacity loss caused by excessive doping is avoided while the lattice structure is stabilized. In addition, the carbon nanotubes and the nitrogen-containing carbon source have a synergistic effect, Li-N-C covalent bonds are formed on the surface of the material, the interface stability is enhanced, the interface side reaction is effectively inhibited, and the surface conductivity is improved. According to the method, through double modification of doping and coating, the problems of low conductivity and poor cycling stability of the lithium iron nickel phosphate material are successfully solved, and the final product shows excellent rate capability and long cycle life.

The invention relates to the technical field of lithium / sodium ion batteries, in particular to a modified current collector, a preparation method of the modified current collector and a negative-electrode-free secondary battery, the modified current collector comprises a porous metal substrate layer; the deposition layer is formed in the porous metal substrate layer, the deposition layer is formed in the porous metal substrate layer through magnetron sputtering of metal Bi or metal Ag or metal Sn or alloy BiAg or alloy BiSn or alloy BiAgSn, and the deposition layer serves as the negative electrode current collector of the negative electrode-free lithium battery or the negative electrode current collector of the negative electrode-free sodium battery. Volume expansion caused by lithium / sodium deposition can be relieved, generation of dendritic crystals in the circulation process is avoided, the reversibility of lithium / sodium metal deposition / stripping is improved, capacity loss in the circulation process is reduced, the cycle life of the battery is prolonged, and the safety performance of the battery is improved.

The invention provides a high-efficiency micro energy storage module based on an intelligent energy management system and a control method, the high-efficiency micro energy storage module comprises an energy storage unit, a power conversion unit, a dynamic equalization unit, an intelligent control unit and a communication interface unit, the energy storage unit is composed of multiple groups of battery clusters, each group of battery clusters comprises battery modules connected in parallel, bidirectional DC / DC converters are configured between the modules so as to realize inter-cluster energy dynamic balance; the power conversion unit comprises a bidirectional DC / DC converter and a multi-level inverter, and is used for realizing electric energy bidirectional conversion between a DC bus and an AC power grid / load. According to the invention, through the dynamic equalization design of the multiple groups of battery clusters and the bidirectional DC / DC converter, efficient energy distribution between the battery packs is realized, and capacity loss caused by inconsistency between the clusters is reduced; a multi-level inverter and a bidirectional DC / DC converter are integrated, so that the DC / AC electric energy conversion efficiency and the waveform quality are improved; the non-dissipative equalization technology based on SOC / SOH dual monitoring reduces energy loss and prolongs the service life of the battery.

The invention provides a lithium supplement functional diaphragm, a lithium ion battery and a preparation method of the lithium ion battery, and relates to the technical field of lithium ion batteries. The lithium-supplementing functional diaphragm comprises a diaphragm base material and a lithium-supplementing agent functional layer coated on at least one surface of the diaphragm base material, wherein the lithium-supplementing agent functional layer comprises a lithium-supplementing agent, a conductive coating layer and a binder; wherein the conductive coating layer coats the outer surfaces of the lithium supplement agent particles and is used for improving the electronic conductivity and environmental stability of the lithium supplement agent; and moreover, the lithium supplement agent functional layer is configured to be decomposed when the battery is charged and formed for the first time, and released lithium ions migrate to the negative electrode to compensate irreversible capacity loss. The conductive coating layer can effectively isolate moisture and carbon dioxide in air from being in contact with the core of the lithium supplement agent, so that the environmental stability of the lithium supplement agent is enhanced, and the storage and transportation conditions are simplified. The lithium supplementing agent functional layer fundamentally avoids the failure problem of the lithium supplementing agent in the positive electrode slurry preparation and pole piece storage process, and the feasibility and yield of industrial production are greatly improved.

The invention relates to the technical field of lithium ion batteries, in particular to an aging identification method and system based on numerical analysis. Comprising the following steps: S1, extracting intrinsic characteristic parameters of positive and negative electrode material button half cells of the lithium ion battery; s2, obtaining a voltage-capacity curve of the lithium ion three-electrode total battery to be detected, extracting intrinsic characteristic parameters of the lithium ion three-electrode total battery, and comparing and calculating the active material loss of the positive electrode and the negative electrode; s3, calculating the loss of active lithium; s4, calculating impedance capacity loss; and S5, integrating the loss of the active material, the loss of the active lithium and the loss of the impedance capacity, and outputting an aging state evaluation result of the lithium ion battery. According to the method, through a full-process data driving analysis mode, the dimension integrity and model reliability of aging parameter identification are remarkably improved, the interaction mechanism of different aging modes is effectively revealed, and a solution is provided for lithium ion battery health state evaluation.

The invention belongs to the technical field of lithium batteries, and particularly relates to a method for forming an SEI film on the surface of a silicon anode. The invention provides a technical scheme for forming SEI through pulse voltage driving customization, parameters such as pulse voltage amplitude, pulse voltage high and low potential duration time and pulse time are reasonably designed, an SEI film with a specific component proportion and a microstructure is induced to be formed on the surface of an electrode, the first coulombic efficiency of a silicon anode is remarkably improved, and the service life of the silicon anode is prolonged. The irreversible capacity loss is reduced, meanwhile, the interface stability is enhanced, and a brand new SEI regulation and control strategy is provided for the development of the high-energy-density lithium ion battery.

The invention provides a lithium ion battery negative electrode material as well as a preparation method and application thereof. The lithium ion battery negative electrode material is a porous silicon carbon material coated with lithium phosphate. The preparation method is simple and efficient, lithium phosphate salt is uniformly distributed on the surface of the porous silicon carbon material through solvent wet coating, the lithium phosphate salt is decomposed into LiF and LixPyOz through sintering and heating, and LiF and LixPyOz coating layers are generated in situ on the surface of the porous silicon carbon negative electrode material of the lithium ion battery, so that the porous silicon carbon material uniformly coated with LiF and LixPyOz is obtained, the advantages of LiF and LixPyOz are combined, and the porous silicon carbon material has the advantages that the porous silicon carbon material can be used for preparing the lithium ion battery negative electrode material through cooperation of LiF and LixPyOz; the silicon-carbon material prepared by the method has the characteristics of high strength, high stability and high ionic conductivity, can effectively inhibit volume expansion of the silicon-carbon material in the charge-discharge process, block penetration of electrons and reduce capacity loss of the silicon-carbon material in the reaction process, is used for manufacturing a lithium ion battery and remarkably improves the cycling stability of the battery.

The invention relates to the technical field of solid-state storage, in particular to a dynamic fault tolerance and replacement system and method for bad blocks of a flash memory. Compared with the prior art, through dynamic migration and global scheduling, prediction maintenance, cross-Die cooperation and a system-level fault-tolerant mechanism, the reliability of the Ink Die storage system is remarkably improved, the bad block replacement efficiency is improved by 40%, the burst failure rate is reduced by 60%, and the data loss risk is reduced; passive replacement operation is reduced by 50% for predictive maintenance, the service life of equipment is prolonged by a cross-Die spare block sharing mechanism, storage resource allocation is optimized, and storage capacity loss is reduced by 25%; according to the collaborative design of RAID and bad block management, the system complexity is reduced, a lightweight end-to-end fault-tolerant scheme is formed, and a better solution is provided for high-reliability storage requirements.

The invention provides a preparation method of a silicon-carbon lithium ion battery and lithium compound solid-state lithium battery, and belongs to the technical field of new energy lithium battery preparation. Aiming at the problems of low energy density, short cycle life and easy thermal runaway of a conventional lithium ion battery and capacity loss caused by cyclic pulverization of a silicon material, the method comprises the following steps: adding 1-80% of silicon powder into a negative electrode base material to improve the energy density of a negative electrode, and spraying 0.1-800% of a lithium compound on a negative electrode plate to supplement cyclic lithium loss. And a solid gel electrolyte (low-temperature injection, normal-temperature infiltration and high-temperature curing) is matched to coat the pole piece. The prepared battery has significantly improved capacity and cycle life, can inhibit short-circuit thermal runaway, has high safety, and is suitable for new energy automobile power batteries, energy storage equipment and other scenes.

This invention relates to a sodium-supplementing material capable of simultaneously replenishing active sodium and sodium hexafluorophosphate, and its preparation and application. The sodium-supplementing material comprises the following raw material components by weight percentage: 10-50% elemental phosphorus, 50-90% sodium fluoride, and 1-5% Ketjen Black. Compared with existing technologies, the phosphorus-based bifunctional sodium-supplementing separator and sodium-supplementing cathode provided by this invention not only possess higher theoretical capacity, effectively compensating for irreversible capacity loss during the first cycle of the battery, but also generate NaPF6 in situ under electrochemical conditions through the synergistic reaction of red phosphorus and sodium fluoride, achieving simultaneous replenishment of active sodium and electrolyte sodium salts, thereby improving the initial coulombic efficiency and long-term cycle performance of the battery.

The invention provides a pre-lithiation silicon-based negative pole piece, a pre-lithiation method and a lithium ion battery, and particularly relates to the technical field of lithium batteries. The pre-lithiation method comprises the following steps: providing a silicon-based negative pole piece; forming a metal lithium film on the surface of the silicon-based negative pole piece; carrying out segmented isostatic pressing on the silicon-based negative pole piece with the metal lithium film formed on the surface so as to carry out pre-lithiation on the silicon-based negative pole piece; wherein the step of segmented isostatic pressing comprises the following substeps: applying a pressure of 200-500MPa to the silicon-based negative pole piece with the metal lithium film formed on the surface, and keeping the pressure for 0.5-5 minutes; and then the pressure is reduced to 50 MPa to 200 MPa, and the pressure is kept for 1 min to 6 h. According to the pre-lithiation method, the metal lithium can be quickly and uniformly pressed into and diffused into the silicon-based pole piece, the reaction of lithium and silicon is accelerated to realize thorough and uniform pre-lithiation, the longitudinal expansion of the silicon-based negative pole is inhibited and the transverse expansion of particles is guided while the first irreversible capacity loss is effectively compensated, so that the secondary irreversible capacity loss is effectively compensated. The density and the mechanical stability of the pole piece are improved.

This invention discloses a lithium manganese iron phosphate composite material modified by a transition metal nitride and amorphous carbon composite coating, its preparation method, and its application, belonging to the field of lithium-ion battery technology. This invention uses vanadium nitride / amorphous carbon to composite-coat lithium manganese iron phosphate material, making the composite cathode material structure more stable. The use of vanadium nitride reduces the amount of carbon coating, avoiding the thickening of the coating layer and the decrease in tap density of the active material caused by high carbon content, which would hinder the lithium iron phosphate process. + The issue of diffusion. Vanadium nitride not only has good electrical conductivity, but also good Li... + Conductive transport properties enable rapid realization of Li + The insertion and extraction of Li not only improves the conductivity of the material, but also further opens up and increases the Li content on the surface of the cathode material. + The diffusion channels reduce the capacity loss of the modified material.

The disclosure herein pertains to a pressure regulation system for use in a silicon dominate anode lithium-ion cell. The pressure regulation system regulates a lifetime pressure on the lithium-ion cell in order to correct for capacity loss and mechanical failure due the expansion of silicon during operation. The pressure regulation system along with a housing maintains a certain pressure range on the lithium-ion cells during the cycling and the operational life of the energy storage device.

Various embodiments of the teachings herein include a method for ascertaining at least one average capacity loss of a battery storage device. The method may include: measuring at least two load cycles of the battery storage device using a high precision coulometry apparatus; determining a first charge displacement and a second charge displacement; determining a capacity loss equal to the difference between the first charge displacement and the second charge displacement; repeatedly measuring load cycles until the capacity loss is almost constant in at least two consecutive load cycles; and ascertaining an average capacity loss based on at least two capacity losses.

This invention provides an anode material, its preparation method, and its application. The anode material includes a silicon-carbon material and a modified coating layer covering the surface of the silicon-carbon material. The silicon-carbon material includes a core and a carbon layer covering the surface of the core. The core includes porous carbon and silicon deposited in the pores of the porous carbon. The modified coating layer, in the direction away from the silicon-carbon material, sequentially includes a first coating layer and a second coating layer. The first coating layer is made of tin and tin sulfide, and the second coating layer is made of a tin-modified sulfide solid electrolyte. Tin compensates for irreversible capacity loss and improves first-time efficiency. Tin and tin sulfide have high ionic conductivity, and the "point-to-surface" conductive network formed by tin and the carbon layer can significantly reduce interfacial resistance. The plasticity of the tin-modified sulfide solid electrolyte itself can optimize the interfacial contact between the anode and the electrolyte, reduce interfacial impedance, and buffer the volume expansion stress of the silicon material during charging and discharging. The synergistic effect of the above structures can effectively suppress the volume expansion of the silicon material.

The invention discloses a preparation method of a boron-based magnesium salt and alcohol / phenol magnesium additive composite magnesium salt electrolyte, and relates to the technical field of magnesium ion batteries, and the preparation method comprises the following steps: S1, in an inert atmosphere or an air environment, dissolving / dispersing a magnesium source in an organic solvent, and stirring to obtain a solution a; s2, adding alcohol or phenol into the solution a, and reacting to obtain a solution b; s3, performing post-treatment on the solution b to obtain alcohol magnesium salt or phenol magnesium salt crystals; and S4, co-dissolving alcohol magnesium salt or phenol magnesium salt and fluorine-containing alkoxy magnesium borate in an ether solvent according to a molar ratio of 1: (3-100) to form the composite magnesium salt electrolyte. According to the magnesium battery using the electrolyte, the cycle life can be prolonged by 20%-100%, the actual service cycle of the battery is prolonged, the coulombic efficiency is improved to 97%-99.5%, irreversible capacity loss in the charging and discharging process is reduced, the energy utilization efficiency is improved, the oxidation potential is improved by 0.2-0.5 V compared with that of a traditional electrolyte, the stability and oxidation resistance of the electrolyte are enhanced, and the service life of the magnesium battery is prolonged. And the working voltage window of the battery is widened.

This application provides a method for the integrated repair and regeneration of waste cathode materials across the entire supply chain and its application. The method includes the following steps: (1) mixing waste cathode materials with a sodium source and calcining them to obtain sodium-doped waste cathode materials; (2) using the sodium-doped waste cathode materials as an adsorbent to adsorb carbon dioxide to obtain adsorbed cathode materials; (3) mixing the adsorbed cathode materials with a carbon-containing lithium source and sintering them to obtain repaired and regenerated cathode materials. In the recycling and repair process of this application, the sodium ions doped not only increase the carbon dioxide adsorption efficiency but also replace lithium, which can repair lithium defects and effectively improve the structural stability of the cathode materials, reduce the capacity loss of the electrode materials during charging and discharging, stabilize the valence of nickel ions, reduce lithium-nickel mixing, and to a certain extent suppress phase transitions during charging and discharging, thereby improving structural stability and electrochemical performance.

The present invention provides a battery-type lithium-ion capacitor and an electronic device. The battery-type lithium-ion capacitor comprises a negative electrode sheet. The negative electrode sheet comprises a negative electrode current collector and a negative electrode active layer provided on at least one surface of the negative electrode current collector. The negative electrode active layer comprises a negative electrode active material, and the negative electrode active material comprises hard carbon and graphite. In the negative electrode active material, the mass percentage of graphite is 2-45%. In the present invention, the graphite in the negative electrode sheet can reduce the consumption of lithium ions by the battery-type lithium-ion capacitor when charging and discharging for the first time, which, overall, improves the efficiency of the battery-type lithium-ion capacitor during charging and discharging for the first time, reduces capacity loss of the battery-type lithium-ion capacitor during charging and discharging, and increases the energy density of the battery-type lithium-ion capacitor.