265results about How to "Improve ionic conductivity" patented technology

The application discloses a kind of full solid-state battery and its preparation method and application, it is related to solid-state battery technical field.The edge of positive active layer is attached with solidified insulating glue, so as to use the solidified insulating glue to fill the size difference between the positive active layer and the negative active layer, and the end of the positive active layer and the negative active layer is flush, the insulating glue plays a supporting role under extrusion, avoids the problems such as collapse and short circuit caused by the size difference between the positive active layer and the negative active layer;The insulating glue at the edge can be bonded with the negative electrode under high pressure, and when the positive electrode is charged and discharged, the cycle performance difference caused by the volume change of the positive electrode during charging and discharging can be effectively alleviated, and the cycle of the battery is improved;It can also effectively avoid the occurrence of problems such as the edge of the positive electrode dropping material.By setting electrolyte film between the positive active layer and the negative active layer, the impedance between the electrolyte film and the electrode sheet is reduced by using the ionic liquid treatment layer on the electrolyte film, and the battery performance is improved.

The invention discloses a preparation method and application of an iron-doped molybdenum disulfide / polymer-based composite solid-state electrolyte, and relates to the technical field of solid-state batteries. After the iron element is doped, defects are introduced into the structure of the modified molybdenum disulfide, phase change is induced, dissociation of the lithium salt is promoted through synergism of the modified molybdenum disulfide and the iron element, and more free lithium ions are released; and meanwhile, the proportion of an amorphous region of the polymer electrolyte is increased, so that the ionic conductivity is improved, and the oxidation resistance is enhanced. In addition, the iron-doped molybdenum disulfide can effectively catalyze decomposition of lithium salt anions, and construction of a uniform and stable solid electrolyte interface (SEI) layer on the surface of the electrode is facilitated. The all-solid-state lithium metal battery assembled based on the modified solid electrolyte shows excellent electrochemical performance.

The invention relates to the field of solid-state batteries, in particular to a halide electrolyte, a preparation method and a solid-state battery. The halide electrolyte comprises a tin element, and the chemical formula of the halide electrolyte is Li2Zr < 1-x > Sn < x > Cl < 6-4x > O < 2x >, and x is less than or equal to 0.3. Through tin-oxygen co-doping, force is exerted at the same time from the two aspects of crystal structure (bulk phase) and interface chemistry, the key problems of ionic conductivity, electrochemical stability, interface compatibility and the like are cooperatively solved, the cost and the process are perfectly considered, and an all-solid-state battery electrolyte solution with a great commercialization prospect is provided.

The invention discloses a flexible transparent film lithium ion battery and a preparation method thereof, and belongs to the field of flexible transparent energy storage devices. The lithium ion battery comprises a positive pole piece, a negative pole piece and a transparent polymer semi-solid electrolyte membrane positioned between the positive pole piece and the negative pole piece, the positive pole piece comprises an Au mesh / PET (Polyethylene Terephthalate) current collector substrate and a LiMn2O4 (at) MWCNTs positive active material layer sprayed on the surface of the Au mesh / PET current collector substrate; the negative electrode plate comprises an Au mesh / PET current collector substrate and a Li4Ti5O12-coated MWCNTs negative electrode active material layer sprayed on the surface of the Au mesh / PET current collector substrate; the transparent polymer semi-solid electrolyte membrane is a PVDF-HFP / PMMA (Polyvinylidene Fluoride-HFPP / Polymethyl Methacrylate)-based gel polymer electrolyte membrane and comprises LiTFSI (LiTFSI) and EMImTFSI. The flexible transparent film lithium ion battery prepared by the invention is of a semi-solid laminated structure, has the advantages of high flexibility, high transparency, excellent cycle performance, rate capability, high bending resistance and the like, and has a good application prospect.

This invention provides a TiS2 composite cathode and an all-solid-state battery device, employing a sulfide solid electrolyte with lithium replenishment and moisture absorption properties, and using TiS2 as the cathode active material. The sulfide solid electrolyte has the following chemical composition: Li 7+y‑ z M y As 1‑y S 6‑z X z Where M is Si, X is a halogen element, 0.3≤y≤0.9, 0≤z≤2. This invention yields a positive electrode with ultra-high load capacity, ultra-long cycle life, and the ability to charge and discharge at ultra-high rates and ultra-high current densities, as well as an all-solid-state battery.

The application discloses a preparation method of a sodium ion battery hard carbon negative electrode material based on step-by-step synergistic regulation, and comprises the following steps: S1, biomass pretreatment; S2, low-temperature pre-carbonization to obtain biomass pre-carbonized carbon; S3, physical activation: the pre-carbonized carbon is placed in an activation atmosphere to perform medium-temperature activation, and biomass activated carbon is obtained; S4, high-temperature carbonization: the biomass activated carbon is placed in an inert atmosphere to perform high-temperature carbonization, and a hard carbon intermediate is obtained; S5, chemical vapor deposition coating: the hard carbon intermediate is placed in a mixed atmosphere of a coating carbon source and an inert gas to perform chemical vapor deposition coating, and a surface-coated biomass hard carbon negative electrode material is obtained. The application can realize a higher closed pore volume at a milder temperature, and the synergistic regulation pore forming mode of activating and forming pores first and then high-temperature closing pores also avoids the insufficient closed pores caused by single high-temperature treatment.

The invention discloses an interfacial film, a preparation method thereof and an application of the interfacial film in assembly of a lithium ion battery, the interfacial film comprises the following components: lithium salt, polyvinylidene fluoride and 1-butyl-2, 3-dimethyl imidazole onium chloride, the mass ratio of the lithium salt to the polyvinylidene fluoride to the 1-butyl-2, 3-dimethyl imidazole onium chloride is about 1: 0.9-1.1: 0.9-1.1, preferably about 1: 0.95-1.05: 0.95-1.05, and the mass ratio of the lithium salt to the polyvinylidene fluoride to the 1-butyl-2, 3-dimethyl imidazole onium chloride is 1: (0.9-1.1): (0.9-1.1), preferably about 1: (0.95-1.05). The weight-average molecular mass of the polyvinylidene fluoride is about 90-110 thousand g / mol, the lithium salt is lithium bis (trifluoromethanesulfonyl) imide (LiTFSI) and / or lithium bis (fluorosulfonyl) imide (LiFSI), the purity of the lithium salt is greater than 99.9%, the polyvinylidene fluoride (PVDF) is selected as a polymer matrix, and is compounded with the ionic liquid 1-butyl-2, 3-dimethyl imidazolium chloride (BMMImCl) and the lithium salt, so that the performance of the lithium ion battery is improved. According to the present invention, the novel interfacial film is prepared, and the interfacial film has characteristics of high temperature resistance, chemical stability, excellent ion transmission characteristic, excellent lithium ion adsorption capacity, excellent performance, and wide application prospect in the lithium battery field.

The invention discloses a composite modification film, a lithium metal negative electrode and a preparation method of the lithium metal negative electrode. The composite modified film comprises an organic polymer solid electrolyte, an inorganic solid electrolyte and a film-forming agent, and the mass ratio of the organic polymer solid electrolyte to the inorganic solid electrolyte to the film-forming agent is (10%-35%): (10%-35%): (30%-80%). The composite modified film effectively buffers cyclic stress, prevents early mechanical failure of the protective layer, and realizes mechanical durability of the interface protective layer; the immobilized film-forming agent can be slowly released, so that the continuous and stable repair of SEI is realized, the dynamic repair capability of the whole life cycle is provided, and the efficient cycle life of the battery is greatly prolonged; and the electrolyte does not need to depend on a high-concentration liquid additive, dramatic change of electrolyte components in circulation is avoided, the overall chemical stability of the battery is improved, and the stability of an electrolyte system is guaranteed.

The invention relates to the technical field of anion exchange membrane fuel cells, in particular to a cation remote grafting type polycarbazole anion exchange membrane and a preparation method thereof. The membrane is prepared by the following steps: condensing N-(4-bromobutyl) carbazole, N-alkyl carbazole and 2, 3-butanedione to obtain a polymer skeleton, then carrying out Menshutkin reaction on the polymer skeleton and cations to obtain polyelectrolyte, and finally carrying out ion exchange on the polyelectrolyte and sodium hydroxide. Wherein the main chain of the polymer has no unstable ether bond, so that the membrane has strong alkali resistance. The flexible overhanging side chain improves dimensional stability and increases polarity differences. Cations are grafted away from a framework, the alkali resistance of the membrane is improved, the service life is prolonged, hydrophilic / hydrophobic microphase separation is enhanced, an ion transmission channel is formed, and the ion conductivity is high. The membrane has good mechanical strength and flexibility, the tensile strength reaches 55.34 MPa, the elongation at break reaches 22.49%, the application requirements of fuel cells are met, and the membrane has excellent thermal stability and wide application prospects in alkaline anion exchange membrane fuel cells.

The invention discloses an ionic gel moisture power generation and power supply system and a preparation method and application thereof, and belongs to the technical field of functional materials and waste gas monitoring. According to the system, dopamine, 1-vinyl imidazole, n-bromobutane and acrylic acid are used as raw materials, and an ionic gel moisture power generation material is prepared through an ultraviolet curing process; carbon cloth is used as an electrode to assemble a moisture power generation device, the device is integrated with a plastic pipe, and stable power support is provided for a waste gas monitoring sensor in the pipe. The ionic gel prepared by the invention has excellent cohesiveness, moisture responsiveness, ionic conductivity and mechanical stability, and the ultraviolet curing process is efficient and environment-friendly; the moisture power generation device can utilize environmental moisture to continuously generate power, solves the problem that a traditional waste gas monitoring sensor depends on an external power supply or frequently replaces a battery, is adaptive to a complex application scene of a plastic pipe, and has a wide industrial application prospect.

The embodiment of the invention provides a preparation method of a halide electrolyte and a solid-state battery, and the method comprises the following steps: weighing raw materials according to the components shown in the chemical general formula of the halide electrolyte and the molar ratio, and then mixing the raw materials to obtain first precursor powder; then pre-sintering the first precursor powder in an inert atmosphere to obtain a first reactant; and finally, carrying out heat treatment on the first reactant in an inert atmosphere to obtain the halide electrolyte. The method is used for achieving the technical effect of improving the ionic conductivity of the prepared halide electrolyte.

The application discloses a negative pole piece and a lithium ion battery, and relates to the technical field of batteries, and specifically discloses a negative pole piece and a lithium ion battery. The negative pole piece comprises a current collector, a first coating layer and a second coating layer which are stacked on at least one side of the current collector; the first coating layer and the second coating layer each comprise a negative active material, a first binder, a second binder, a first conductive agent and a second conductive agent; and the preparation of the negative pole piece satisfies the following conditions: 2≤C2 / C1≤4 and 1.05≤X / Y≤1.25, wherein C1 and C2 are the mass proportions of the first conductive agent in the first coating layer and the second coating layer respectively, and X and Y are the solid contents of the first coating layer slurry and the second coating layer slurry respectively. According to the application, the solid content of the slurry, the proportions of different active materials and conductive agents are designed and controlled in the double-coating pole piece, and the designed proportions satisfy a certain functional relationship, so that the ion conductivity of the battery can be effectively improved while the high conductivity of the pole piece is maintained, the direct-current internal resistance of the pole piece in the charging and discharging process is reduced, the rate charging and discharging performance is improved, and the lithium precipitation window is widened.

This invention relates to the field of solid-state battery technology, and particularly to a composite solid-state electrolyte material, its preparation method, and its application. The composite solid-state electrolyte material contains a crystalline phase substance with the general chemical formula: B%A a RE b X 1 c D g +C%A d M e X 2 f D h Where A represents charge carriers; RE represents rare earth elements; M represents metallic elements; X represents... 1 X 2 D is a halide anion; A is an anion doping element or group; a RE b X 1 c D g and A d M e X 2 f D h It is a crystalline phase substance; B% is A a RE b X 1 c D g The mass fraction of the composite solid electrolyte material; C% is A d M e X 2 f D h The mass fraction of the composite solid electrolyte material is defined as follows: 0 ≤ a ≤ 3, 0 < b ≤ 1, 0.5 < c ≤ 12, 0 < d ≤ 5, 0 < e ≤ 2, 1 < f ≤ 20, 0 ≤ g ≤ 4, 0 ≤ h ≤ 5; 85 < B + C < 98, 10% < B% ≤ 85%; 10% < C% ≤ 85%, 0.2 ≤ C / B ≤ 10. The composite solid electrolyte material of this invention includes crystalline and amorphous phase components, giving it high ionic conductivity. The use of moisture-resistant non-metallic halide components instead of traditional halides and oxyhalides in the raw materials also provides it with good air stability.

The invention belongs to the technical field of batteries, and particularly relates to a composite solid electrolyte membrane, a preparation method thereof and a battery. The method comprises the following steps: mixing a perfluorosulfonic acid type polymer with an alkali metal compound, and carrying out a neutralization reaction to obtain a first mixed solution; stirring and mixing the first mixed solution and an alcohol solvent to obtain a second mixed solution; stirring and mixing the second mixed solution, a multivalent metal ion compound and metal oxide nanoparticles to form composite slurry; and coating the composite slurry on the surface of a current collector and carrying out gradient drying to obtain the composite solid electrolyte membrane. According to the method, the ionic conductivity of the solid electrolyte membrane is improved, and the coating uniformity or the membrane layer compactness is improved.

The embodiment of the invention relates to the field of electrolysis, and provides an isolating membrane, a preparation method thereof and an alkaline electrolysis device. The isolating membrane comprises a supporting layer, a functional layer is arranged on the surface of the supporting layer, and the functional layer is partially embedded into the supporting layer; the porosity of the functional layer is 53%-65%, the average pore size of pores in the functional layer is 50-110 nm, and the average pore size of pores in the supporting layer is larger than the average pore size of pores in the functional layer; the functional layer comprises an inorganic hydrophilic filler and a polymer matrix, and the D50 particle size of the inorganic hydrophilic filler is 0.3-1.5 [mu] m. The isolating membrane in the embodiment of the invention at least has good gas barrier property and good ionic conductivity at the same time, so that the alkaline isolating membrane not only has good safety performance, but also is relatively low in energy consumption.

The polymer electrolyte membrane for a lithium secondary battery according to the present invention comprises a copolymer. The copolymer has: a main chain comprising a first repeating unit and a second repeating unit; a fluoroalkyl group which is bonded to the main chain by a side chain; and a polymer segment that is bonded to the main chain in a side chain and contains oxygen. The lithium secondary battery according to the present invention comprises the polymer electrolyte membrane for a lithium secondary battery.

The invention discloses a high-flexibility aryl polymer and a preparation method and application thereof.The high-flexibility aryl polymer replaces traditional polyoxyethylene, and a solid electrolyte prepared from the high-flexibility aryl polymer is high in room-temperature ionic conductivity, good in flexibility and resistant to high voltage. A novel polymer matrix material is developed, the problems that an existing polymer electrolyte is low in room-temperature ionic conductivity, not resistant to high voltage, poor in flexibility and the like are fundamentally solved, and the key technical bottleneck in the current solid-state battery field is broken through.

The application discloses a niobium-based compound / silicon-carbon composite material and a preparation method and application thereof, and belongs to the technical field of lithium ion batteries.The composite material comprises a silicon-based material, a plurality of niobium-based compound particles anchored on the outer surface of the silicon-based material, and a carbon nano layer coated on the outer surfaces of the silicon-based material and the plurality of niobium-based compound particles.The composite material is realized by using a simple, convenient and industrialized production liquid phase method.The composite material obtained by the preparation method effectively alleviates the volume expansion of the silicon-based material and avoids the problem of niobium-based compound falling off, and when the composite material is applied to a lithium ion battery as a negative electrode material, excellent rate performance and cycle stability are exhibited.

This invention relates to the field of battery separator materials technology, specifically to MXene-functionalized aramid paper-based battery separators, their preparation methods, and applications. Meta-aramid paper is prepared by wet papermaking using short-cut meta-aramid fibers and precipitated fibers. MXene nanosheets are prepared by hydrofluoric acid etching. Using the meta-aramid paper as a substrate, a functional coating is constructed on the surface of the aramid paper by loading a mixture of para-aramid nanofibers and MXene through a vacuum-assisted filtration-layer-by-layer self-assembly method. The resulting functionalized separator is obtained through protonation reduction. The separator, with its three-dimensional porous protective layer constructed from para-aramid nanofibers and MXene, combines physical barrier and chemical bonding, effectively inhibiting polysulfide shuttle. Furthermore, the highly active sites of MXene can activate inert sulfur-containing substances, improving sulfur utilization. When used in assembling lithium-sulfur batteries, the separator achieves an initial discharge capacity of 1244 mAh·g at a constant current density. ‑1 The capacity retention rate is 82% after 200 cycles.

This invention provides a halide solid electrolyte and its preparation method, belonging to the field of solid electrolyte technology. First, alkylphosphonic acid is reacted with lithium carboxylate to prepare lithium-ionized alkylphosphonic acid. Then, the lithium-ionized alkylphosphonic acid is mixed with a halide electrolyte, and the mixture is dispersed in a solvent, stirred, filtered, and dried to obtain a halide solid electrolyte coated with lithium-ionized alkylphosphonic acid. This invention constructs a dense, uniform hydrophobic protective layer on the surface of halide electrolyte particles through in-situ coating with long-chain lithium alkylphosphonate, effectively isolating moisture and oxygen from the environment and significantly improving the air stability of the halide electrolyte. Simultaneously, this coating layer helps reduce the interfacial impedance between the electrolyte and electrode materials, optimizing the overall ionic conductivity of the material.

The application belongs to the field of batteries and relates to a blended polymer full solid-state electrolyte containing nano-powder rubber, a preparation method of the blended polymer full solid-state electrolyte and a lithium ion battery. The full solid-state electrolyte comprises a polymer blend, a lithium salt and nano-powder rubber; the polymer blend comprises polyacrylonitrile and polypropylene carbonate; the weight content of the polymer blend is 25-70%, the weight content of the lithium salt is 20-50% and the weight content of the nano-powder rubber is 3-35% based on the total weight of the full solid-state electrolyte. The full solid-state electrolyte has higher conductivity and better cycle performance.

The application provides a pyridyl-containing covalent organic framework fiber composite film and a preparation method thereof. The preparation method comprises the following steps: mixing an amine monomer solution and an aldehyde monomer solution to perform a condensation reaction, obtaining a first mixed solution, and obtaining pyridyl-containing covalent organic framework nanoparticles after centrifugation; wherein the aldehyde monomer solution is obtained by mixing an aldehyde monomer and an acetic acid solution, and the amine monomer solution is obtained by mixing an amine monomer containing pyridyl groups and water; mixing the pyridyl-containing covalent organic framework nanoparticles and a nanocellulose solution to obtain a second mixed solution containing covalent organic framework nanocellulose; and performing film forming treatment on the second mixed solution to obtain the pyridyl-containing covalent organic framework fiber composite film. The covalent organic framework nanoparticles are combined with nanocellulose, the high crystallinity and pore characteristics of the covalent organic framework are retained, and the mechanical strength of the composite film is improved by using the mechanical properties of nanocellulose.

The application provides a composite metal sodium negative electrode material, a preparation method thereof and a sodium metal battery. The composite metal sodium negative electrode material comprises a porous organic film skeleton, an alloy type conductive sodium-philic layer and sodium metal filled in the pores inside the porous organic film skeleton. The application takes the porous organic film skeleton as a base material, constructs a three-dimensional flexible skeleton, and deposits the alloy type conductive sodium-philic layer on the porous organic film skeleton, so that the active sites for sodium ion deposition are increased and the rapid transmission of sodium ions is promoted.

This invention belongs to the field of lithium battery material technology, specifically relating to a metal oxide / mesoporous manganese dioxide / conductive polymer composite material, its preparation method, and its application. The preparation method includes the following steps: 1) ball milling a commercial metal oxide; 2) mixing the metal oxide powder with an organic polymer monomer and a methyl orange solution and ultrasonically dispersing the mixture to obtain a liquid mixture; 3) adding a potassium permanganate solution to the liquid mixture and performing a high-pressure hydrothermal reaction under stirring to obtain the composite material; 4) subjecting the composite material to alkali treatment, filtering, washing with water, and drying to obtain the metal oxide / mesoporous manganese dioxide / conductive polymer composite material. This metal oxide / mesoporous manganese dioxide / conductive polymer composite material can be used to prepare lithium battery cathode materials with high specific capacity, high conductivity, and high stability in a simple, efficient, and low-cost manner. It is easy to industrialize and solves the problems of low conductivity and poor rate discharge performance of traditional metal oxide cathode materials.

This invention relates to the field of sodium-ion battery technology, and discloses a sodium-ion cathode material, its preparation method and application, a sodium-ion battery, a sodium-ion battery pack, and a device. The sodium-ion cathode material includes a matrix and a coating layer covering the matrix; the matrix has the composition shown in Formula I: Na 1‑x [Ni y Mn z M u Ti v O2 Formula I; the coating layer has the composition shown in Formula II: Na 2‑β Ti 6‑α M′ α O 13 Formula II. This sodium-ion cathode material possesses characteristics such as high ionic and electronic conductivity, strong structural stability, and strong chemical stability. Furthermore, using this composite cathode material in sodium-ion batteries can effectively improve the battery's electrochemical performance.

The invention discloses a lithium carbon fluoride battery electrolyte, a preparation method thereof and a lithium carbon fluoride battery, and belongs to the technical field of lithium / carbon fluoride primary batteries. The lithium carbon fluoride battery electrolyte comprises a lithium salt and a monofluoro-substituted short-chain ether solvent. Compared with a non-fluorinated ether solvent, the monofluoroether solvent has good compatibility with a carbon fluoride positive electrode and a metal lithium negative electrode, so that the battery has good discharge performance. Compared with a polyfluoro-substituted ether solvent, the monofluoro substituent group (-CH2F) obviously improves the ionic conductivity of the lithium carbon fluoride battery electrolyte at low temperature, and meanwhile, the monofluoro substituent group (-CH2F) has weak solvation energy at low temperature, so that the discharge platform of the battery at low temperature is obviously improved, and the discharge capacity of the battery is improved.

This invention belongs to the field of lithium metal battery technology, specifically relating to a fluorinated phase-separated polymer ion gel electrolyte, its preparation method and application, and lithium metal batteries. The fluorinated phase-separated polymer ion gel electrolyte provided by this invention comprises a solid phase and a liquid phase; the solid phase is a copolymer of a fluorinated acrylate monomer and a crosslinking agent containing carbon-carbon double bonds; the liquid phase comprises an ionic liquid and a lithium salt dissolved in the ionic liquid. Compared to liquid electrolytes and traditional SPEs, the fluorinated phase-separated polymer ion gel electrolyte provided by this invention has high ionic conductivity, mechanical strength, interfacial stability, and safety. It can effectively suppress the growth of lithium dendrites and adapt to large volume changes, avoiding short circuits and thermal runaway in lithium metal batteries under conditions of overcharging, over-discharging, or mechanical impact.

The present application relates to a kind of electrolyte additives and its preparation method, belong to electrolyte technical field;The present application uses propenyl-1,3-sulfonic acid lactone as raw material, using the double bond of propenyl-1,3-sulfonic acid lactone and the amino group of 4-amino-2-(trifluoromethyl) thiophene occurs Michael addition reaction under the catalysis of 1,8-diazabicyclo (7-ene) Undecane, obtain the intermediate with tertiary amine structure, then through the quaternary ammonium salt reaction of tertiary amine structure of intermediate and bromo atom of ethyl bromoacetate, obtain additive, the additive of the present application and phosphate ester additive are compounded to obtain electrolyte additive, the present application is modified by propenyl-1,3-sulfonic acid lactone, introduce fluorinated alkyl, effectively reduce intermolecular force, weaken the dependence of electrolyte viscosity on temperature, improve the ionic conductivity of electrolyte under low temperature condition.

The application discloses a polymer electrolyte for a lithium metal battery and a preparation method and application thereof, and relates to the technical field of battery electrolyte materials. + The desolvation energy barrier at the electrode interface is reduced, the ionic conductivity of the electrolyte is significantly enhanced, and the lithium ion can be guided to form a stable solid electrolyte interface film in cooperation with the lithium ion, so that the uniform lithium ion flow is achieved, the uncontrollable growth of lithium dendrites is significantly inhibited, the side reaction consumption of the electrolyte in the cycle process is greatly reduced, and the long-period stability of the battery is effectively ensured, and the application is suitable for large-scale popularization and application in lithium metal batteries.

This invention discloses a mesoporous carbon composite material and its preparation method. The preparation method is as follows: S1: Using tetraethyl orthosilicate as the silicon source, an ethanol / deionized water mixture, a surfactant as the solvent system, and a conductive agent as the dopant, a polycondensation reaction is carried out under acid-base catalysis. A silica / soft template composite is formed through a sol-gel process, followed by high-temperature sintering to obtain a silica composite template; S2: A mixed solution A is prepared by mixing a phenol source, a dispersant, and water; a mixed solution B is prepared by mixing an aldehyde source, a lithium supplement, and a catalyst; S3: Mixed solutions A, B, and the silica composite template are reacted, carbonized, and activated. The resulting material is then added to a hydrofluoric acid solution to dissolve the template, and the resulting material undergoes thermal reduction to obtain the mesoporous carbon composite material. The mesoporous carbon prepared using the template method exhibits advantages such as high uniformity, large pore volume, and low powder resistivity. It can be applied to silicon-carbon composite materials to increase the deposition amount of nano-silicon, improve specific capacity, and reduce the expansion of silicon-carbon materials.