334 results about "Half-cell" patented technology

The invention provides a remote capacity checking method and system for a direct-current power supply storage battery pack, and the method comprises the steps: enabling a to-be-tested storage battery to be temporarily disconnected from a network through a switch device during capacity checking, carrying out the discharging and charging experiments through remote control, and carrying out the capacity checking of the to-be-tested storage battery pack through the combination of all online measured total battery data and measurement data obtained through an offline half battery experiment. And executing an optimization algorithm to obtain the relationship between the capacity of the monomer under different decline degrees and the potential of the positive electrode and the negative electrode, and calculating the loss of the active material on the basis of the relationship, thereby realizing capacity checking, and accurately analyzing and early warning the decline and aging of the monomer and the overall potential risk of the storage battery at the same time. Compared with an existing common storage battery capacity checking mode, equipment shutdown and labor cost are reduced, and meanwhile efficiency is remarkably improved.

The invention discloses boron-phosphorus co-doped phenolic resin-based hard carbon as well as a preparation method and application thereof. The preparation method of the hard carbon comprises the following steps: co-dissolving a phenol monomer and a boron source in a mixed solvent to obtain a phenol monomer mixed solution; a formaldehyde solution is added into the phenol monomer mixed solution for a polymerization reaction, and boron-doped phenolic resin is obtained; and washing and drying the boron-doped phenolic resin, adding a phosphorus source, fully mixing, and carbonizing in a protective atmosphere according to a temperature programming method to obtain the boron-doped phenolic resin. According to the material, based on the synergistic effect between boron and phosphorus elements and a resin-based hard carbon skeleton, the excellent conductivity of the material is guaranteed, meanwhile, defect sites in the material are greatly increased, and through tests, the reversible specific capacity of a sodium ion half-battery adopting the hard carbon negative electrode material is 290 mAh / g or above when the sodium ion half-battery is subjected to a constant-current charge-discharge test under the current density of 1A / g, and the reversible specific capacity of the sodium ion half-battery is higher than 290 mAh / g. And the capacity retention ratio can reach 94.8% after 1000 cycles, and the capacity retention ratio is still more than 60% under the current density of 5A / g.

The invention belongs to the technical field of aqueous zinc ion batteries, and discloses a preparation method and application of an aqueous zinc ion battery negative electrode coating material. The composite material is a silver-loaded carbon nitride composite material, and the composite material is used as a water-based zinc ion battery negative electrode artificial interface layer. A silver-loaded carbon nitride composite nano material is used as a zinc negative electrode interface coating. Silver nano ions can effectively improve electrostatic shielding on the surface of the zinc negative electrode, zinc ions are easier to deposit, and growth of zinc dendrites is inhibited; the material has excellent mechanical strength and chemical stability, so that the corrosion of electrolyte to the negative electrode is effectively inhibited; the protective layer is simple in preparation process, the prepared coating is high in adhesive force, a stable interface layer is easy to form, the half-cell cycle efficiency stability is obviously improved, the half-cell can stably circulate for 1323 circles, and the service life of the water-based zinc ion battery is prolonged.

A chamber, e.g. in a heat exchanger or flowing electrolytic half-cell, for through flow of a fluid which is capable of elastic turbulence has an internal structure with obstructions to compel flow to undergo successive changes of direction thereby applying stress to the flow of fluid through the chamber. The internal structure comprises an upstream portion in which the applied stress induces elastic turbulence to begin and a downstream portion which applies less stress per unit length and sustains the elastic turbulence while providing economy of pressure to propel the fluid. Configuration of the upstream portion may be planned with computer modeling so as to avoid formation of stagnant zones.

The invention provides a high-performance all-solid-state electrolytic tank for producing hydrogen by electrolyzing water and a preparation method of the high-performance all-solid-state electrolytic tank. The preparation method mainly comprises the following steps: preparation of electrode powder: preparing (La0. 6Sr0. 4) 0.95 Co0. 2Fe0. 8O3-delta (LSCF) powder by adopting a liquid-phase synthesis method, and preparing MxCe1-xNyO2 powder by adopting a coprecipitation method for an electrode and an isolating layer; preparing a half cell by adopting a co-casting process; an isolating layer and an oxygen electrode are prepared by adopting a silk-screen printing technology, and high-content water vapor is introduced to realize hydrogen production by electrolyzing water. The prepared high-performance all-solid-state electrolytic tank has efficient water electrolysis hydrogen production catalytic activity and Faraday efficiency, can operate at the medium-high temperature of 650-850 DEG C, and can effectively reduce electric energy consumption and improve energy conversion efficiency.

The invention discloses a working condition monitoring method for a sodium ion battery sodium precipitation behavior based on battery impedance analysis. The core principle of the method is based on the following points: when sodium precipitation occurs, sodium metal is deposited on the surface of hard carbon, so that the physical and chemical properties of the surface of the hard carbon can be changed; the conductivity of sodium metal is obviously different from that of a hard carbon material, so that the charge transfer resistance of hard carbon is obviously changed. In addition, the appearance of the sodium metal also causes the change of the electric double layer capacitance on the hard carbon surface; therefore, whether sodium metal begins to be separated out or not can be accurately judged by detecting the change of the charge transfer resistance and the electric double-layer capacitance on the hard carbon surface; according to the scheme, in-situ monitoring of sodium metal precipitation can be achieved under the condition that the battery structure is not damaged, the sodium metal precipitation situation of the sodium ion battery in the half-battery discharging process can be sensitively captured, and sodium metal deposition of the half battery, the full battery and the soft package battery under the actual operation condition can be monitored in real time.

The invention relates to a formula of a high-performance sodium-ion battery electrolyte, and aims to improve the cycle life, safety and rate capability of a sodium-ion battery. The electrolyte comprises sodium hexafluorophosphate as a sodium salt, carbonic ester as an organic solvent and a plurality of additives (fluoroethylene carbonate, bis (2, 2, 2-trifluoroethyl) carbonate, ethylene sulfate, 1, 3-allyl sultone and sodium difluoro (oxalato) borate). Through the synergistic effect of the additives, a stable positive electrode / electrolyte interface film (CEI) is formed, cation dissolution is reduced, and the sodium ion transmission performance and the high-voltage stability of the battery are improved. In a half cell assembled with a NaNi0. 4Fe0. 2Mn0. 4O2 positive electrode, when the electrolyte works in a voltage range of 2-4.2 V, the specific discharge capacity of more than 160mA. H / g is provided, and the capacity retention ratio exceeds 80% after 200 cycles at the rate of 1C.

The invention discloses a negative electrode material rate capability testing method and application, and the negative electrode material rate capability testing method comprises the steps: taking a negative electrode material to be tested, and assembling the negative electrode material into a button type half cell; activating the button type half cell; the activated button type half cell is subjected to n times of cyclic charging and discharging, and n is a natural number and is larger than or equal to 2; the multiplying power X adopted in the discharging stage of each cycle charging and discharging is different; the state of charge SOC (i) when the potential is the preset value PV in each charging and discharging is calculated, the higher the state of charge SOC (i) is, the better the rate capability of the negative electrode material to be tested is, i is a natural number, and n > = i > = 2. According to the test method provided by the embodiment of the invention, the negative electrode material meeting the quick charge requirement can be quickly screened out, the difference between the multiplying power and the quick charge performance of different materials can be accurately compared, the evaluation efficiency of the lithium ion battery is accelerated, and the test method also plays an important role in improving the efficiency of the process development and optimization process of the negative electrode material.

The invention discloses sodium titanate with a layered crystal structure, a preparation method of the sodium titanate and application of the sodium titanate in a water-based magnesium ion battery, and belongs to the technical field of water-based magnesium ion batteries. According to the invention, the sodium titanate with a layered crystal structure is used as the negative electrode material of the aqueous magnesium ion battery, and due to excellent chemical and structural stability, the sodium titanate can realize reversible Mg < 2 + > intercalation / deintercalation in an aqueous magnesium electrolyte. According to the invention, Na2Ti2O5 and Na2Ti3O7 materials are synthesized by a hydrothermal method and a high-temperature annealing process. In a magnesium chloride electrolyte, the two sodium titanate materials both show extremely low charge and discharge potentials (Na2Ti2O5,-1.3 to-0.6 V vs.SCE; sCE (-1.5 to-1 V vs.SCE) and relatively good cycling stability are achieved. In addition, the charge-discharge specific capacity of the Na2Ti2O5 half cell under the current density of 2A / g is up to 213mAh / g, and the high specific capacity of 150mAh / g is still kept under the high current density of 10A / g. The sodium titanate is an ideal aqueous magnesium battery negative electrode material, has the advantages of low cost and environmental friendliness, and has a great application prospect in the field of aqueous magnesium ion energy storage.

The invention discloses an edge passivation method of a solar cell, which comprises the following steps of: cutting a cell piece along the middle to obtain a half cell piece; stacking the half cells together, and aligning the cutting surfaces; and putting the half cells which are stacked together into a reaction chamber, enabling the cutting surface or the back surface of the cell to face upwards, and depositing a passivation layer on the cutting surface by adopting a PECVD (Plasma Enhanced Chemical Vapor Deposition) method to finish edge passivation of the half cells. According to the edge passivation method, the reaction temperature can be widened to 50-500 DEG C, energy consumption can be reduced, the deposition rate and productivity can be improved, a compact passivation layer with the high hydrogen content can be prepared, the good passivation effect can be achieved on the premise that an annealing procedure is not needed, and the edge passivation method has the advantages of being low in cost, high in productivity, excellent in passivation effect and the like; it can be ensured that the half-piece battery has very high conversion efficiency, the mass production efficiency can be improved by 0.247%, and the method has important significance for promoting industrial application of the half-piece battery.

A method (100) for producing a half-cell (1), in particular formed by a double ceramic layer consisting of an electrode (4) and an electrolyte (5) coupled to each other, for a solid state fuel cell, comprises a process (200) for producing a green electrode body (2); a process (300) for producing a green electrolyte body (3); a coupling step (400), in which the green electrode body (2) and the green electrolyte body (3) are coupled together; and a sintering step (500), following the coupling step (400), in which the green electrode body (2) and the green electrolyte body (3) coupled together are sintered so as to make the half-cell (1) formed by the coupled electrode (4) and electrolyte (5).

A lithium secondary battery includes a positive electrode including a positive electrode active material layer and a negative electrode including a negative electrode active material layer, wherein the negative electrode active material layer includes a negative electrode active material, and the negative electrode active material consists of silicon. In a graph of capacity-voltage measured by manufacturing a half-cell including the positive electrode and a lithium metal electrode and then discharging the half-cell at a constant current of 0.1 C, an inflection point appears in a region in which a voltage is 3.3 V to 3.7 V. The capacity of the positive electrode at the inflection point is from 3% to 25% of the capacity of the positive electrode at a final charge voltage.

The invention provides a phosphate and polyethylene oxide modified silicon-based double-layer negative electrode material and a preparation method thereof. The negative electrode material is of a modified silicon and graphite double-layer structure, a modified silicon material layer is arranged on the surface of a copper current collector, and a graphite layer is arranged on the surface of the modified silicon material. The preparation method of the modified silicon material comprises the following steps: (1) carrying out ball milling on silicon powder, lithium hydroxide and ammonium dihydrogen phosphate to prepare lithium phosphate modified silicon powder; (2) stirring and sintering the modified silicon powder and glucose to obtain a carbon-coated modified silicon material; and (3) mixing the modified silicon powder with polyethylene oxide to prepare slurry, and coating the slurry on a current collector to obtain the modified silicon material layer. The preparation method of the graphite material comprises the following steps: mixing graphite powder and polyethylene oxide to prepare slurry, and coating the slurry on the surface of the modified silicon material layer to obtain the silicon-based double-layer negative electrode material. According to the silicon-based double-layer negative electrode material disclosed by the invention, inorganic and organic modified materials are introduced, so that the silicon-based double-layer negative electrode material has high electronic conductivity and ionic conductivity, meanwhile, the stability of the silicon-based negative electrode material is improved to a certain extent by adding a graphite double-layer structure, and a half battery assembled by the material has good cycle performance and rate capability.

The invention provides a power device with improved short-circuit current capability and a manufacturing method thereof. The power device comprises at least one cell. The cell is divided into two half cells along the width direction of the cell. Each half cell comprises a drift region, a source doped region and a source metal connected with the source doped region. The source doped region includes a source region and a plurality of contact regions. The source region comprises at least one first extension region, the plurality of contact regions are arranged in the length direction of the cell, and any two adjacent contact regions are spaced by the first extension region. And configuring the connection state of the source metal and the source doped region to be local connection of the source metal of at least one half-cell and at least one first extension region. According to the power device, the on-resistance is increased by prolonging the path of current flowing through the source region, and the short-circuit current capability is improved. The gate structures of part of the cells of the power device are adjusted, so that the short-circuit current capability and the conduction current capability of the device are further balanced. The manufacturing method is simple in steps.

A chamber, e.g. in a heat exchanger or flowing electrolytic half-cell, for through flow of a fluid which is capable of elastic turbulence has an internal structure with obstructions to compel flow to undergo successive changes of direction thereby applying stress to the flow of fluid through the chamber. The internal structure comprises an upstream portion in which the applied stress induces elastic turbulence to begin and a downstream portion which applies less stress per unit length and sustains the elastic turbulence while providing economy of pressure to propel the fluid. Configuration of the upstream portion may be planned with computer modeling so as to avoid formation of stagnant zones.

The invention discloses a resin-based hard carbon composite material and application thereof in button type half-cell preparation. The method comprises the following steps: melting phenol, and adding a formaldehyde solution to prepare a mixed solution A; dispersing the carbon nano tube powder and hexadecyl trimethyl ammonium bromide in pure water, and grinding to obtain carbon nano tube dispersed slurry B; and adding the carbon nanotube dispersion slurry B into the mixed solution A to obtain a mixed solution C, adjusting the pH value to prepare a phenolic resin precursor solution, carrying out cross-linking curing to prepare a phenolic resin cured precursor, carrying out mechanical grinding, and putting the phenolic resin cured precursor into a tubular furnace to finally prepare the resin-based hard carbon composite material. Conductive carbon is introduced to the condensation polymerization end of phenol and formaldehyde, a communicated conductive network is formed in the composite material by regulating and controlling the material composition, the electron transmission distance between particles is shortened, the intrinsic conductivity of original resin carbon is improved, and the composite material has the advantages of high capacity, high first efficiency, high magnification and low ash content; wide application prospects are realized in the field of lithium ion battery negative electrode materials.

The invention provides a method for generating an OCV curve of a battery mixed electrode. The method comprises the following steps: testing half-battery open-circuit voltage OCP and specific capacity Q corresponding to a single raw material corresponding to a to-be-tested mixed electrode; interpolating an open circuit voltage (OCP) of the half-cell into a function of a state of lithium insertion (SOL); calculating an SOL sequence under a target open-circuit voltage OCV sequence of a single raw material of the mixed electrode and a corresponding specific capacity sequence; adding the specific capacity sequence according to the weight of the mixed weight ratio to obtain the specific capacity sequence of the mixed electrode; and calculating the SOC sequence of the mixed electrode. Based on the thermodynamic principle, a more stable and reliable hybrid electrode OCV prediction result is obtained through mathematical model calculation.

The present invention discloses a biphasic Nitrogen doped sodiophilic anode. The present disclosure also provides a process of preparing a defect rich Nitrogen doped waste polymer derived carbon (PDC) and commercial polyvinyl based polymer derived carbon (PRC) as carbon precursor for use in sodium ion / metal battery with high capacity, long cyclic stability in both half cell and full cell.

The invention discloses a positive pole piece and a lithium ion battery comprising the same, and belongs to the technical field of electrochemistry. The positive pole piece comprises a positive current collector and positive active material layers arranged on two sides of the positive current collector, each positive active material layer comprises a high-nickel ternary positive material as a positive active material, and the positive pole piece meets the following relational expression: (H * RDv) / 10 <-2.5 > * A is greater than or equal to 2.0 and less than or equal to 11.0; h is the thickness of the positive electrode active material layer; rDv is a particle size distribution function of the positive electrode active material; a is a peak area ratio of characteristic peaks in a positive pole piece half-cell charging dQ / dV-V curve. By reasonably controlling the thickness of the positive electrode active material layer and the ratio of the particle size of the positive electrode active material to the characteristic peak in the dQ / dV-V curve of the positive electrode plate, the lithium ion battery containing the positive electrode plate has good fast charge cycle performance, and the risk of thermal runaway is reduced.

In its first aspect, the current collector comprises a polymer film, a first metal layer adhered to the polymer film, and a second metal layer adhered to the polymer film on one side opposite the first metal layer. The polymer film encloses an electrically conductive filler and has a surface resistance of 1 megaohm / square or less. The first and second metal layers each have a thickness of 3 µm or less. The current collector exhibits a mean discharge voltage that is at least 20% lower than that of an untreated, battery-grade copper foil, based on a standard test of a lithium-ion battery half-cell at a temperature of 25 °C and a discharge rate of 2C or higher.

The invention belongs to the technical field of binders, and provides a water-based adhesive system, a Si-C composite negative electrode and a preparation method of the Si-C composite negative electrode. The water-based adhesive system comprises polyacrylic acid, a water-based composition, a polymer and water, the water-based composition comprises carboxymethyl cellulose and butadiene styrene rubber in a mass ratio of 1: (1-2), and the polymer comprises a polyurethane elastomer and / or a dynamic covalent bond polymer. The PAA is used as a main bonding matrix, hydrogen bonds or weak chemical bonds are easily formed on the surfaces of silicon particles, and Si expansion can be restrained; cMC / SBR provides certain flexibility and dispersity, and the overall uniformity and flexibility of the electrode coating are improved; the dynamic covalent bond polymer or the polyurethane elastomer can realize reversible crosslinking when electrode microcracks are generated, and the self-repairing capability is provided; the Si-C composite negative electrode prepared by the water-based adhesive system shows higher capacity retention ratio and longer cycle life in a half-battery or full-battery test.

The invention discloses a preparation method and application of a composite 3D negative electrode current collector for a lithium metal battery, and belongs to the field of batteries, and the preparation method comprises the following steps: firstly, introducing a reduced graphene oxide artificial interface layer on the surface of the current collector through a chemical coating means, so that the reduced graphene oxide artificial interface layer and the current collector are tightly combined and are not easy to fall off after being bent due to chemical reaction in the process; and the conductivity and the ductility of the coated current collector are not greatly damaged. Then, on this basis, a three-dimensional micro-pit array structure with a lithium-loving oxide layer is introduced on the surface of the current collector by means of laser etching, so that the specific surface area of the current collector is increased, the surface current density distribution is adjusted, lithium metal is effectively induced to be uniformly deposited on the macro-scale and the micro-scale, and formation of lithium dendrites is inhibited; the lithium copper half battery assembled by the current collector has excellent cycle performance. The preparation process flow is simple, the composite 3D current collector with excellent performance is prepared, the cost is effectively reduced, and the production efficiency is improved.

The invention provides a method for assisting and strengthening a chemical reaction of a flow battery based on local ultrasound, which comprises the following steps of: (1) arranging ultrasonic transducers on bipolar plates of a positive half battery and a negative half battery of the flow battery, the arrangement position of the ultrasonic transducer on the bipolar plate and the size of the ultrasonic transducer enable the action area of ultrasound applied by the ultrasonic transducer to cover the flow dead zone in the porous electrode; (2) connecting a signal generator with an ultrasonic transducer through a power amplifier; and (3) in the operation process of the flow battery, starting the signal generator and the power amplifier to apply ultrasound to the flow battery through the ultrasonic transducer, and improving the flow velocity and the flow uniformity of the electrolyte in the porous electrode by utilizing the ultrasound so as to strengthen the chemical reaction of the flow battery. According to the method, the flow uniformity of the electrolyte in the porous electrode can be effectively improved, the flexible regulation and control of the flow field in the porous electrode of the flow battery are realized, and the ultrasonic power consumption of the regulation and control of the flow field in the electrode is reduced.

The invention relates to the technical field of solar cells, in particular to a full-perovskite laminated cell interlayer structure based on a low-dimensional carbon material, which comprises a wide-band-gap perovskite half cell positioned at the bottom and a narrow-band-gap perovskite half cell positioned at the top, a middle layer structure is arranged between the wide bandgap perovskite half cell and the narrow bandgap perovskite half cell; the middle layer structure comprises an electron transport layer I, an ALD compact protection layer, a low-dimensional carbon material charge recombination layer and a hole transport layer II which are arranged from bottom to top; and finally, evaporating an electrode and packaging so as to prepare the complete all-perovskite laminated solar cell. According to the scheme, the cost is greatly reduced, parasitic absorption is effectively reduced, the deposition time is shortened, diffusion of precious metal is avoided, the device stability is remarkably improved, and the scheme has great significance in industrialization of the full-perovskite laminated calcium battery technology.

The invention relates to a sulfonic group modified ZIF-67 coated diaphragm as well as a preparation method and application thereof, and belongs to the technical field of lithium batteries. Comprising a porous base membrane and a modified coating coated on one side or two sides of the porous base membrane, and the modified coating comprises sulfonic group functionalized ZIF-67 nanoparticles and a binder, the sulfonic group functionalized ZIF-67 nanoparticles are a metal organic framework material formed by coordination self-assembly of a cobalt source, a 2-methylimidazole ligand and an imidazole auxiliary ligand containing a sulfonic acid group. Imidazole ligands with sulfonic acid groups are introduced into a ZIF-67 framework through in-situ coordination self-assembly, homogenization of lithium ion flux is achieved through regular pore channels of ZIF-67, meanwhile, anion decomposition is promoted through the electrostatic induction effect of the sulfonic acid groups, and the lithium ion transference number is increased. The diaphragm can effectively inhibit the growth of lithium dendrites, and shows excellent cycling stability and rate capability in an NCM811 / Li metal total battery, a Li-Li symmetric battery and a Li-Cu half battery.

The invention belongs to the technical field of lithium ion battery negative electrode materials, and particularly discloses a nanometer silicon / high-entropy alloy oxide / carbon composite lithium ion battery negative electrode material with a honeycomb-like three-dimensional hierarchical nanometer structure and a preparation method of the nanometer silicon / high-entropy alloy oxide / carbon composite lithium ion battery negative electrode material. The preparation method comprises the following steps: respectively adding PVP and silicon nanoparticles into deionized water, and stirring for 12-24 hours; adding oxysalts of iron, nickel, cobalt, chromium and manganese with equal molar weight, stirring for 12-24 hours, and then freeze-drying for 24-48 hours; and finally, putting the freeze-dried product into a tubular furnace, and calcining at high temperature in an inert atmosphere to obtain the composite lithium ion battery negative electrode material. A half battery prepared from the composite lithium ion battery negative electrode material prepared by the method has high initial specific discharge capacity and excellent capacity retention ratio, and the preparation method of the composite material is simple and convenient to operate, low in cost and suitable for large-scale production, and provides a new idea for preparation of a silicon-based composite electrode.

The invention relates to a method for applying a laser annealing technology to edge passivation of a half-piece battery, which is applied to the technical field of battery passivation and comprises the following steps of: forming end slots at two ends of a battery parting line by using pulse laser, and cutting the slotted battery by using a temperature step of laser heating and atomization cooling to obtain the half-piece battery; stacking and pressing the dried half cells, placing the half cells into a coating material box, and carrying out AlOx film layer deposition on the cutting surfaces of the half cells by using an ALD deposition method; and carrying out laser annealing treatment along the cutting surface of the half-piece cell, which is subjected to AlOx film layer deposition, by using a laser beam to finish edge passivation. The method has the advantages that the passivation performance can be improved, the process time is shortened, the energy consumption is reduced, and the edge of the battery is passivated.

The invention provides a water-based composite electrolyte and a preparation method and application thereof. The water-based composite electrolyte comprises soluble zinc salt, amino acid hydrochloride additives and deionized water. The aqueous composite electrolyte can be used for a symmetrical button cell, a half cell or an aqueous zinc ion total cell. By adjusting zinc ion deposition on the surface of the zinc electrode, the growth of zinc dendrites is reduced, and the shuttle effect of the iodine positive electrode is inhibited, so that the coulombic efficiency and the cycle performance of the water-based zinc-iodine battery are improved. The additive disclosed by the invention can be adsorbed on the surface of a zinc negative electrode, delays the nucleation process and inhibits the growth of zinc dendrites; the form of hydrochloride can play a role of a buffer solution, stabilize the pH value of the electrolyte, inhibit the corrosion of the zinc negative electrode and reduce the hydrogen evolution reaction; the hydrochloride form can weaken the protonation effect of amino acid groups and enhance the electrostatic interaction between the amino acid groups and the polyiodide, so that the shuttle effect is inhibited, and the coulombic efficiency and the cycle performance of the aqueous zinc-iodine battery are 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 relates to the technical field of fuel cells, and provides a solid oxide fuel cell and a preparation method thereof, and the preparation method comprises the following steps: providing a half-cell precursor comprising an electrolyte layer and a NiO-based ceramic layer; placing the half-cell precursor in an acid solution for reaction treatment, selectively etching to remove at least part of NiO phase in the NiO-based ceramic layer, and cleaning to form a porous ceramic layer; injecting nickel slurry into pores of the porous ceramic layer, and performing drying and first calcination treatment to form a porous Ni-based metal ceramic composite anode layer; and preparing a porous cathode layer on the surface of the other side of the electrolyte layer to form the solid oxide fuel cell. According to the method, the NiO phase of the NiO-based ceramic layer is removed by using the pickling solution, and the nickel slurry is injected to construct the porous Ni-based metal ceramic composite anode, so that the problems that the pore structure is random and difficult to control when the porous anode is prepared by pore-forming of a traditional pore-forming agent and reduction of NiO by introducing hydrogen, and the active area of the anode is reduced due to migration, agglomeration and coarsening of Ni particles are solved.