200results about How to "Reduce interface resistance" patented technology

The invention provides a carbon-coated current collector and a preparation method and application thereof. The carbon-coated current collector comprises a current collector base material and a carbon-coated layer on at least one side of the current collector base material; the carbon coating layer comprises a conductive agent, a binder and a cross-linking agent; the binder comprises a polyacrylic acid polymer and polystyrene microspheres. According to the carbon-coated current collector provided by the invention, the cohesive force between the current collector and an electrode active material layer is improved through the synergistic effect of the polyacrylic acid polymer, the polystyrene microspheres and the cross-linking agent, the interface resistance is also reduced, and meanwhile, the electrochemical performance of a pole piece is improved.

The invention relates to the technical field of lithium ion battery materials, and provides a lithium iron phosphate positive electrode material, a preparation method thereof and a lithium battery. The preparation method of the lithium iron phosphate positive electrode material comprises the following steps: performing a first coprecipitation reaction on a first iron source solution and a first phosphorus source solution in the presence of a polymer monomer to obtain an iron phosphate seed crystal; performing a second coprecipitation reaction on the second iron source solution and the second phosphorus source solution in the presence of a polymer monomer and an iron phosphate seed crystal to obtain iron phosphate dihydrate; iron phosphate dihydrate, a lithium source and a carbon source are mixed and then subjected to spray drying, the mixture is placed in a rotary kiln to be sintered, carbon-coated lithium iron phosphate with the large particle size and carbon-coated lithium iron phosphate with the small particle size are prepared at different sintering temperatures respectively, and the carbon-coated lithium iron phosphate with the different particle sizes are mixed according to the mass ratio to obtain the lithium iron phosphate positive electrode material. The lithium iron phosphate positive electrode material has relatively good spherical morphology, so that the lithium iron phosphate positive electrode material has relatively high compaction density and electrical properties after grading.

The invention relates to a polymer-based composite solid electrolyte, a preparation method and a sodium solid-state battery, and belongs to the technical field of solid-state batteries. The polymer-based composite solid electrolyte is prepared from the following components in parts by mass: 8 to 12 parts of alkene polymer, 4 to 8 parts of sodium salt and 1 to 8 parts of filler, and the filler is nitrided nano TiO2. The polymer-based composite solid electrolyte can be prepared in a simple and efficient mode, the ionic conductivity is high, the electrochemical stability window is wide, the ionic conductivity reaches 0.3-1.2 mS / cm, and the electrochemical stability window reaches 4.3-5.5 V; and meanwhile, the formation of good SEI can be promoted in the sodium solid-state battery, and the interface stability between the electrolyte and the electrode is improved.

The invention relates to the technical field of aluminum electrolysis carbon anodes, in particular to a prebaked carbon anode with high conductivity and oxidation resistance and a preparation method of the prebaked carbon anode. The raw materials of the prebaked carbon anode comprise dry materials with multiple particle sizes and a binder, and the total weight m1 of the dry materials with multiple particle sizes and the weight m2 of the binder meet the relational expression: m1: m2 = (82: 18)-(88: 12); wherein the raw materials of the dry material comprise calcined petroleum coke with multiple granularities and conductive carbon materials with multiple granularities, and the calcined petroleum coke and the conductive carbon materials meet the following relational expressions: m3: m4 = (80-95): (5-20), and m31: m42 = m3: m4. According to the prebaked carbon anode, the conductivity and the oxidation resistance can be synchronously improved.

The invention discloses a solid-state lithium battery and a preparation method thereof and belongs to the technical field of battery processing. The preparation method of the solid-state lithium battery comprises the following steps: S1, assembling a positive plate, a diaphragm and a negative plate into a dry cell; wherein a composite film layer is cured on a current collector base material of the negative plate, and rubidium nitrate is added into the composite film layer; s2, injecting the gel precursor solution into a dry battery cell, fully standing, and charging the battery cell to 100% SOC; wherein the gel precursor solution contains an electrolyte, a cross-linking agent and an initiator; and S3, heating to initiate a chemical cross-linking reaction of a cross-linking agent in the gel precursor solution, and carrying out in-situ polymerization and curing on the surface of each component of the dry cell and in internal pores thereof to obtain a gel polymer electrolyte, thereby forming the solid-state lithium battery. According to the invention, the interface resistance can be reduced, and the lithium ion transmission capability and efficiency are improved.

The invention belongs to the field of lithium battery negative electrode materials, and particularly relates to a TiO2 (at) SiO (at) Si / RGO silicon-based negative electrode material and a preparation method and application thereof. The silicon-based negative electrode material comprises RGO with a three-dimensional skeleton structure and TiO2 (at) SiO (at) Si particles compounded on the RGO, each TiO2 (at) SiO (at) Si particle comprises a Si inner core, a SiO layer coated on the surface of the Si inner core and a TiO2 layer coated on the surface of the SiO. The preparation method is characterized in that a TiO2 (at) SiO (at) Si / RGO silicon-based negative electrode material with a specific structure is designed and synthesized, SiO and TiO2 double-layer coating is carried out on a Si core in sequence, and TiO2 (at) SiO (at) Si particles are uniformly compounded on RGO with a three-dimensional skeleton structure, so that the TiO2 (at) SiO (at) Si / RGO silicon-based negative electrode material with a specific structure is obtained. The obtained TiO2 (at) SiO (at) Si / RGO silicon-based negative electrode material not only can effectively inhibit volume expansion when the silicon-based negative electrode material is applied to a lithium ion battery, but also is beneficial to promoting electron transfer, so that the rate capability, the first effect performance and the cycle performance of the silicon-based negative electrode material are improved.

The invention discloses an all-solid-state battery frame structure with a porous structure and double-side supporting thin-layer electrolyte and a preparation method of the all-solid-state battery frame structure. The all-solid-state battery frame structure comprises two layers of porous solid-state electrolyte supporting bodies and a layer of thin-layer solid-state electrolyte, the porous solid electrolyte support bodies are respectively arranged on the upper surface and the lower surface of the thin-layer solid electrolyte as support bodies, and the porous solid electrolyte support bodies have three-dimensional porous structures. According to the all-solid-state battery and the preparation method thereof, the thin-layer solid-state electrolyte of which the two surfaces are supported and homogenous and of a porous solid-state electrolyte structure is prepared through an additive manufacturing technology, and then positive and negative electrode materials are injected into pore channels of a porous solid-state electrolyte supporting body, so that the all-solid-state battery of a 3D structure is constructed, and the thin-layer solid-state electrolyte has low internal resistance; the three-dimensional porous structure support has high reliability; the anode and cathode materials and the solid electrolyte are in three-dimensional contact, and the interface resistance is small.

The invention relates to the technical field of sodium ion battery positive electrode materials, in particular to a high-voltage positive electrode material, a preparation method thereof, a positive electrode plate and a sodium ion battery. The high-voltage positive electrode material comprises an O3-phase layered oxide matrix material and a coating layer coating the surface of the O3-phase layered oxide matrix material, the chemical formula of the O3-phase layered oxide base material is NaaNixAyMnpGqO2, A comprises a metal element with the valence of + 2 and / or + 3, and G comprises a metal element with the valence of + 4; and modification elements in the coating layer comprise at least one of Al, B, Ca, Co, Ce, La, Mg, Mo, Nb, Sr, Sn, W, Y, Zr, Zn, Bi and Ti. The material has reversible phase change under high voltage, can work under high voltage, and has excellent cycle performance.

The invention discloses a composite additive for a vanadium electrolyte and a preparation method of the composite additive, and relates to the technical field of vanadium batteries. The composite additive is applied to the electrolyte of the vanadium battery, the electrolyte is a positive electrode electrolyte and a negative electrode electrolyte, the concentration of the vanadium electrolyte can be improved, precipitation and crystallization of vanadium ions can be inhibited, and meanwhile, the electrochemical activity of the vanadium battery can be improved. The composite additive comprises a mixture formed by a first component and a second component, the first component comprises at least one of a fluorine-containing compound, oxyacid and oxysalt, and the second component is a surfactant.

The invention discloses a sodium ion halide solid electrolyte as well as a preparation method and application thereof, and belongs to the technical field of batteries, the sodium ion halide solid electrolyte realizes optimization of a sodium ion transmission path and a microstructure by doping BH4 anions and O anions into a structure and regulating and controlling the doping amount; the sodium ion migration activation energy is reduced, the ionic conductivity of the product is effectively improved, and meanwhile, the product has oxidation resistance and high electrochemical stability and can be compatible with a high-voltage positive electrode material during application.

The invention discloses a bamboo hard carbon material, comprising the following components in parts by weight: 65-70 parts of bamboo powder, 6-8 parts of phosphoric acid, 5-7 parts of ethylenediamine, 4-6 parts of N-hydroxysuccinimide, 3-6 parts of 2,5-furan dimethanol, and 80-90 parts of deionized water. The bamboo hard carbon material is prepared by the following method: bamboo is pre-treated and carbonized, ball-milled to obtain 500-mesh bamboo powder, then mixed with phosphoric acid, ethylenediamine, N-hydroxysuccinimide, 2,5-furan dimethanol, deionized, dried, filtered to obtain modified bamboo powder, and then the modified bamboo powder is carbonized at high temperature and plasma treated to obtain the bamboo hard carbon material. The bamboo hard carbon material prepared by the present invention can be used as a negative electrode material of an ion battery, which can effectively improve the specific capacity, initial coulomb efficiency, and rate performance of the ion battery, and enhance its cycle stability, prolong service life, and the production process is simple and easy to promote.

The invention relates to an all-solid-state lithium battery and a preparation method thereof. The all-solid-state lithium battery comprises a positive electrode, a negative electrode, a solid electrolyte membrane and a barrier layer arranged between the negative electrode and the solid electrolyte membrane, the solid-state electrolyte membrane comprises a first halide solid-state electrolyte, the barrier layer comprises a second halide solid-state electrolyte, the chemical general formula of the second halide solid-state electrolyte is Li3MCl6-xBrx, M is a trivalent metal ion, 0 lt; xlt; 6; and the second halide solid electrolyte in the barrier layer is converted from a solid state to a liquid state and then is converted from the liquid state to the solid state. According to the all-solid-state lithium battery provided by the invention, the dense barrier layer comprising the second halide solid electrolyte is arranged between the negative electrode and the solid electrolyte membrane, so that the growth of lithium ions in the solid-state lithium ion battery is effectively inhibited, and meanwhile, the ionic conductivity is improved, the interface impedance is reduced, and the internal resistance of the battery is reduced.

The invention relates to a phosphorylated bacterial cellulose coating material, a preparation method and a water-based zinc battery negative electrode, bacterial cellulose is modified by ammonium dihydrogen phosphate and urea to obtain phosphorylated bacterial cellulose, the phosphorylated bacterial cellulose is added with water for dispersion and then dispensed on the surface of a zinc negative electrode, and after drying, the surface of the zinc negative electrode is modified with a phosphorylated bacterial cellulose coating. A layer of organic zinc phosphate can be generated at the junction of the coating and the zinc negative electrode to separate electrolyte from the zinc negative electrode, and meanwhile, phosphorylated fibers have stronger interaction with water molecules, so that the electrolyte can be locked. Therefore, the hydrogen evolution reaction on the surface of the zinc negative electrode and the generation of byproducts are effectively inhibited, the corrosion resistance of the water-based zinc ion battery is enhanced, and the shelf life of the battery is prolonged. Meanwhile, the deposition behavior of zinc ions can be effectively regulated and controlled by the fine network structure of the bacterial cellulose and phosphate groups on the fibers, so that the generation of zinc dendrites is inhibited, and the long cycle life of the water-based zinc ion battery is effectively prolonged.

The invention belongs to the technical field of electrochemical energy storage materials, and particularly relates to a titanium-oxygen cluster electrolyte additive as well as a preparation method and application thereof. The titanium-oxygen cluster and the polycaprolactone derivative are jointly placed in an organic solvent and subjected to an exchange reaction, a modified titanium-oxygen cluster solution is obtained, and after the solvent is volatilized, the titanium-oxygen cluster electrolyte additive is obtained. The preparation method provided by the invention is simple to operate and easy to popularize, and the titanium-oxygen cluster electrolyte additive can be oxidized and decomposed in situ on the surface of an electrode in the battery cycle process to form a TiO2-rich inert interface protection layer only by being mixed into the electrolyte. The titanium-oxygen cluster electrolyte additive can act on a positive electrode interface and a negative electrode interface at the same time, and a formed TiO2 interface protection layer can inhibit surface reactivity, prevent surface reconstruction and impedance accumulation, protect a positive electrode material structure from being damaged, inhibit non-uniform growth of negative electrode lithium dendrites and improve the service life of the lithium ion battery. And the cycling stability and safety of the lithium metal battery under high voltage are effectively improved.

The invention provides a composite solid electrolyte membrane, a preparation method thereof and a solid-state battery, and relates to the technical field of energy storage. The preparation method comprises the following steps: preparing a first solid electrolyte layer, wherein the first solid electrolyte layer comprises a first solid electrolyte; carrying out hot pressing treatment on the first solid electrolyte layer and the second solid electrolyte layer, and cooling to obtain a composite solid electrolyte membrane; in the hot pressing treatment, the second solid electrolyte is converted into a liquid state from a solid state. By adopting the preparation method, the density of the composite solid electrolyte membrane can be improved, the interface problem is solved, the interface resistance is reduced, the growth of lithium dendrites is inhibited, and the ionic conductivity is improved.

The invention relates to the technical field of electrode materials, in particular to a composite silicon negative electrode material suitable for a sulfide-based all-solid-state battery and a preparation method and application thereof, and the preparation method comprises the following steps: (1) generating a metal organic framework material on the surface of a nano silicon material through an in-situ growth method; (2) carbonizing the metal organic framework material on the surface of the nano silicon material through calcination treatment to form a nitrogen-doped porous carbon material, so as to obtain a Si-NC material; and (3) generating a sulfide solid electrolyte on the surface of the Si-NC material through an in-situ growth method to obtain the Si-NC-SE composite silicon negative electrode material. According to the invention, the surface of the Si material is coated with the nitrogen-doped porous carbon material (NC) through an in-situ generation technology, and the sulfide solid electrolyte is generated in situ, so that the conductivity of the composite silicon negative electrode material and the cycling stability of the sulfide-based all-solid-state battery adopting the composite silicon negative electrode material are improved.

The invention belongs to the field of solid-state lithium metal batteries, and particularly relates to a component gradient solid-state electrolyte and a preparation method thereof, and the component gradient solid-state electrolyte comprises a poly (ethylene oxide) (PEO)-based electrolyte for stabilizing a lithium metal negative electrode and a poly (vinylidene fluoride-co-hexafluoropropylene) (PVDF-HFP)-based solid-state electrolyte for stabilizing a high-voltage positive electrode. The preparation method is a multi-material 3D printing technology based on a mixed printing nozzle, and the solid electrolyte film with component proportion gradient change is realized by dynamically changing the mixing proportion of two electrolytes. The obtained polymer-based component gradient electrolyte can be compatible with a lithium metal negative electrode and a high-voltage positive electrode material at the same time, and is suitable for a high-energy-density solid-state lithium metal battery. The preparation method is simple, low in cost and easy for large-scale production.

The invention discloses a preparation method of a solid electrolyte composite coating modified positive electrode material. The preparation method specifically comprises the following steps: S1, preparing a positive electrode material composite coating layer; s2, optimizing the characteristics of the composite coating layer; s3, assembling the solid-state battery; the invention relates to the technical field of solid-state batteries. According to the preparation method of the solid-state electrolyte composite coating modified positive electrode material and the solid-state battery, the interface resistance between the positive electrode and the solid-state electrolyte is effectively reduced through the oxide-polymer composite coating layer, the rapid transmission of lithium ions is promoted, and the charge-discharge efficiency and the energy density of the battery are improved; the flexibility of the polymer and the high mechanical strength of the oxide are combined, the structural stability of the battery in the charging and discharging process is improved, the pulverization and peeling phenomena of the positive electrode material are reduced, the cycle life of the solid-state battery is remarkably prolonged by optimizing the composition and structure of the coating layer, the capacity fading is reduced, and the service life of the solid-state battery is prolonged. And the cycling stability and reliability of the battery are improved.

This coated active material is provided with an active material and a coating layer that contains a first solid electrolyte and that coats at least a part of the surface of the active material, the first solid electrolyte containing Li, M1, O, and X1, M1 being at least one element selected from the group consisting of Ta and Nb, X1 being at least one element selected from the group consisting of F, Cl, Br, and I, and X1 being at least one element selected from the group consisting of F, Cl, Br, and I; the thickness of the coating layer is greater than 0 nm and 75 nm or less, the molar ratio Li / M1 of the Li to the M1 is 0.60-2.4, and the molar ratio O / X1 of the O to the X1 is 0.16-0.35.

The invention belongs to the field of batteries, and particularly relates to an electrolyte and a semi-solid battery. The electrolyte comprises a lithium salt, a solvent and an additive, the additive comprises a solvent additive; the solvent additive comprises a low HOMO energy level solvent; preferably, the solvent with the low HOMO energy level is 2, 2, 2-trifluoroethanol (TFEA), and the solvent with the low HOMO energy level is 2, 2, 2-trifluoroethanol (TFEA). According to the electrolyte disclosed by the invention, by adopting the solvent additive with low HOMO energy level, the stability of the battery under high voltage can be effectively improved, an electrolyte-electrode interface is protected, the dissolution of transition metal is inhibited, electrolyte side reaction caused by moisture, free acid and transition metal is reduced, and the performance of the battery in a high-temperature storage test is improved; meanwhile, the cycle life and the rate capability of the battery are improved.

The invention discloses a water-based conductive binder for a lithium ion battery. The conductive binder is an in-situ reaction compound of an emulsion polymer and a conductive material, the conductive ink comprises the following components in parts by weight: 1-10 parts of a surfactant, 5-40 parts of acrylic acid and salts thereof, 5-40 parts of acrylate and derivatives thereof, 0.1-2 parts of an initiator, 1-15 parts of a modified conductive agent, 0.5-5 parts of a conductive polymer, 2-15 parts of a functional enhancer, 1-5 parts of an environment-friendly additive and 50-200 parts of deionized water. According to the invention, the modified conductive carbon black, the modified carbon nanotube and the modified graphene are selected as conductive agents and are combined with the conductive polymer, so that a stable three-dimensional conductive network is formed in the binder, the conductivity of the binder is remarkably improved, and the network structure is beneficial to reducing the interface resistance and improving the rate capability and the energy density of the battery.

The present application provides a diaphragm-free lithium ion battery. The battery comprises a positive electrode current collector, a positive electrode active material, a solid electrolyte, a solvent, a negative electrode active material, and a negative electrode current collector. The solid electrolyte is a solid porous organic polymer, which contains specific functional groups, including weakly coordinated anion groups, and the corresponding cation of the anion group is lithium ion. The porous polymer is a solid powder, which can act as a barrier between the positive electrode active material and the negative electrode active material, eliminating the need for a diaphragm and greatly improving the safety performance of the battery.

The invention discloses a preparation method of a standardized sheet for a thermoelectric test of minerals or mineral materials and alloys, belongs to the technical field of mineralogy, material science and prospecting prediction, and establishes a preparation process of a universal mineral or mineral material and alloy thermoelectric sheet. Covering all semiconductor mineral types or mineral material types such as pyrite, magnetite, graphite and sintered ore; accurate thickness control is achieved through a double-face polishing-loading sheet supporting structure, in-situ testing of the thermoelectricity of minerals or mineral materials and alloys is achieved, and the testing precision is improved; by adopting a conductive adhesive-copper plate composite structure, the interface resistance is reduced, the supporting strength is met, and the requirement of eliminating detection interference is met; residual colloid is thoroughly removed through ultrasonic cleaning, and the insulation effect is avoided; according to the standardized sheet, the hollow aminated phenolic resin nanosphere is used as a conductive substrate and is used for bonding a sample and a copper plate, the contact resistance between the sample and an electrode can be greatly reduced, and the accuracy of test data is improved.

The invention discloses a preparation method of a composite ion conductor, and belongs to the field of lithium battery solid electrolyte materials. The composite ion conductor is obtained by loading ionic liquid through MOFs pore channels. The preparation method comprises the following steps: S1, preparing an Al-based MOFs material MIL-101; s2, the MIL-101 is modified, and NH2 (at) MIL-101 is prepared; s3, preparing a lithium ion liquid Li-IL; and S4, preparing a composite ion conductor NH2 (at) MIL-101 / Li-IL. The prepared composite ion conductor is used as a solid electrolyte, carbon-coated lithium iron phosphate is used as a positive electrode, a lithium battery is assembled by matching, the electrochemical performance of the lithium battery is tested, and the test finds that the solid electrolyte shows excellent rate capability and cycle performance at room temperature and has wide application potential.

This invention belongs to the field of battery material technology, and provides a single-lithium-ion conductive polymer solid electrolyte, its preparation method, and its application. The single-lithium-ion conductive polymer solid electrolyte of this invention uses P... 1,101 TFSI / Li-Nafion@LLZTO was added as a filler to the matrix resin to promote the addition of cationic Li in the lithium salt. + The migration of lithium ions improves the efficiency of lithium ion transport, which is beneficial for enhancing the contact between the electrode and the interface. It also results in high ionic conductivity and lithium ion transference number (ionic conductivity can reach up to 2.31 × 10⁻⁶). ‑4 S cm ‑1 With an ion transference number of up to 0.63, it exhibits high electrode / electrolyte interface stability, which can reduce interface resistance and contribute to the practical application and high performance of lithium-ion batteries based on SLCP solid electrolyte.

The invention relates to the field of sodium ion batteries, in particular to a composite sodium ion battery solid electrolyte and a preparation method thereof, which are used for solving the problems of low ionic conductivity, poor interfacial compatibility and poor chemical stability of the existing solid electrolyte. According to the preparation method, the high-performance polymer is used as a main raw material, the dispersed and modified carbon nanotubes are added into the high-performance polymer, the advantages of all the components are fully played, the ionic conductivity of the solid electrolyte is effectively improved, the electrochemical performance of the sodium-ion battery is effectively improved, and the sodium-ion battery has excellent chemical stability; compared with the prior art, the all-solid-state sodium-ion battery has the advantages that the cycle stability and safety of the all-solid-state sodium-ion battery are remarkably improved, the service life is prolonged, the potential safety hazards of volatile, explosion and the like of the traditional liquid electrolyte are avoided, and the preparation method is simple, feasible, easy to operate, low in cost and beneficial to large-scale commercial application.

The present invention relates to an energy-saving high-strength fence-type composite anode plate for nonferrous metal electrowinning and a preparation method thereof, and belongs to the technical field of nonferrous metallurgy. The composite anode plate of the present invention comprises an aluminum conductive beam, a copper-aluminum composite conductive head is fixedly arranged at the end of the aluminum conductive beam, a fence-type aluminum-based composite anode plate bracket is fixedly arranged at the bottom end of the aluminum conductive beam, and a plurality of horizontal conductive reinforcing ribs are fixedly arranged along the longitudinal direction on the fence-type aluminum-based composite anode plate bracket, and both sides of the fence-type aluminum-based composite anode plate bracket are covered with insulating sheaths, and the two ends of the conductive reinforcing ribs are arranged in the insulating sheaths; the fence-type aluminum-based composite anode plate bracket is composed of a plurality of parallel anode composite rods, and the anode composite rods include aluminum alloy rods, transition layers, lead-bismuth-antimony / rare earth-nano cobalt composite layers, and aluminum-titanium-boron particle surface-coated lead-silver composite coatings from the inside to the outside; wherein the transition layers include zinc layers, copper layers, and lead-tin-rare earth composite layers from the inside to the outside.

The invention relates to a battery, a preparation method thereof and electric equipment, and belongs to the technical field of secondary batteries. The battery comprises a negative pole piece and an electrolyte, wherein the negative pole piece is immersed in the electrolyte; the negative pole piece comprises a negative active material layer and a negative current collector, the negative active material layer is attached to the negative current collector, the negative active material layer comprises a negative active material, and the negative active material comprises a sulfur-doped active material; the electrolyte comprises a carbonic ester compound and a lithium salt; a sulfur-doped active material is used as a negative electrode active material and is matched with an electrolyte containing a carbonic ester compound, and the carbonic ester compound and an intermediate product lithium polysulfide of sulfur conversion reaction and a lithium salt in the electrolyte are jointly reacted; in the first cycle charging process, a layer of solid electrolyte-electrode interface with relatively high ionic conductivity and relatively low interface resistance is generated on the surface of the negative electrode through in-situ polymerization, so that the battery has high safety performance and also has good rate capability and electrode-electrolyte interface contact.

The invention discloses an infiltration method of a lithium battery pole piece, the lithium battery pole piece and a lithium battery, the infiltration method of the lithium battery pole piece comprises the following steps: S1, providing an infiltration agent solution: mixing an infiltration agent main material and an additive according to a mass part ratio of 7: 1-9: 1 to obtain the infiltration agent solution; s2, providing a positive electrode plate: coating, cutting and drying the positive electrode slurry to obtain the positive electrode plate, wherein a functional nano material is added into the positive electrode slurry; the addition amount of the functional nano material is 0.4%-0.6% of the total mass of the dry powder in the positive electrode slurry in percentage by mass; and S3, infiltration: infiltrating the positive pole piece obtained in the step S2 into the impregnating compound solution obtained in the step S1. According to the infiltrating method of the lithium battery pole piece, the infiltrating effect is uniform and rapid, and the performance of a lithium battery is improved; the lithium battery prepared from the lithium battery pole piece obtained by the infiltration method has higher energy density and longer cycle life.

The invention belongs to the technical field of battery foils, and particularly relates to a method for reducing interface resistance of an aluminum foil-carbon coating layer. The method comprises the following steps: (1) treating, washing and drying an aluminum foil by using a sodium hydroxide solution; (2) coating one surface of the aluminum foil with conductive slurry, performing first drying in an oxygen-deficient atmosphere or an inert atmosphere, and coating the surface of the aluminum foil with a first carbon coating layer; and (3) coating the conductive slurry on the other surface of the aluminum foil, carrying out second drying, and coating the second carbon coating layer on the other surface of the aluminum foil. Therefore, by controlling the oxygen-deficient atmosphere or the inert atmosphere in the drying and first drying processes, the problem that aluminum oxide is regenerated from aluminum in the drying and first drying processes is avoided. Therefore, the problems that the resistance of the carbon-coated aluminum foil is increased and the interface resistance of the pole piece is increased are solved.