32 results about "Ti doping" patented technology

The invention provides a modified positive electrode material and a preparation method and application thereof. The modified positive electrode material comprises a lithium manganese iron phosphate inner core and a coating layer coating the surface of the lithium manganese iron phosphate inner core, and the material of the coating layer comprises oxyfluoride; ti and S are co-doped in the lithium manganese iron phosphate core. Ti and S are co-doped in a lithium manganese iron phosphate core, Ti doping can introduce additional electron holes to enhance the intrinsic electron conductivity of the material, S doping can expand a lithium ion channel and improve the Li < + > diffusion rate, and the Ti doping and the S doping are synergistically optimized through two channels of electron conduction-ion migration, so that the rate capability and the cycling stability of the positive electrode material are improved; the oxyfluoride is adopted as a coating layer material, so that HF corrosion and dissolution of transition metal can be reduced, an interface side reaction is inhibited, meanwhile, the excellent thermal stability and wide electrochemical window of the oxyfluoride can inhibit decomposition and gas production of an electrolyte in a high-temperature environment, and the thermal stability and electrochemical stability of the modified positive electrode material are improved.

The invention relates to a Ti element doped high-performance high-temperature samarium cobalt permanent magnet material and a preparation method thereof, and belongs to the field of rare earth permanent magnet materials. Elements of Sm, Co, Fe, Cu, Zr and Ti with the purity higher than 99.9% are uniformly mixed and smelted into an original cast ingot, a powder metallurgy preparation technology is adopted, the cast ingot is ground into alloy powder, and the samarium-cobalt permanent magnet material is prepared through orientation compression, isostatic pressing, high-temperature sintering, solid solution and isothermal aging heat treatment processes. According to the invention, by doping the Ti element, the grain size is increased, the grain boundary impurity phase precipitation is inhibited, and the thickness and the content of the flaky phase are properly reduced, so that the number of reverse magnetization nucleation sites is reduced, and the magnetic properties such as the coercive force and the maximum magnetic energy product of the magnet are effectively improved.

The application relates to a low-cost surface titanium doping method of a lithium-rich positive electrode material and belongs to the field of lithium ion battery positive electrode materials. Specifically, the method comprises the following steps: placing the positive electrode material into a solution with a specific pH, then continuously stirring and adding a titanium sulfate solution into the solution; filtering the solid powder obtained after reaction for a certain time, drying, and sintering at high temperature to obtain the titanium surface-doped positive electrode material. The lithium-rich positive electrode material prepared by the method has improved first circle coulomb efficiency, discharge specific capacity and cycle performance, the process is simple, the cost is lower than that of an organic titanium source, the method is suitable for large-batch treatment of the lithium-rich positive electrode material, the use demand of the power battery can be met, and the method has a good application prospect.

The application discloses a titanium-doped sheet-layer FER molecular sieve and application of the titanium-doped sheet-layer FER molecular sieve in an electrochemical sensing detector for rutin, and belongs to the technical field of molecular sieve synthesis and electrochemical sensor detection. n -O-(p-C6H4)2-O-(CH2) n -NH-C2H4-NH2; wherein n is 10-16. The titanium-doped sheet-layer FER molecular sieve is immobilized with chitosan to obtain a composite material, an electrode is modified by using the obtained composite material to construct an electrochemical sensor, and the obtained electrochemical sensor is used for detecting and analyzing rutin. The concentration linear range of the electrochemical sensor for detecting rutin reaches 0.1-10 micromoles per liter, the concentration detection range is wide, the detection sensitivity, accuracy, repeatability and selectivity are high, the detection lower limit is low, and the stability is good.

This invention relates to the field of materials science, specifically to a method for preparing a high-bonding, ultrahard nanolayered thin film, the film itself, and its applications. The film comprises a Cr / Ti metal bonding layer, a CrTiN intermediate layer, a TiNC transition layer, and an a-C:Ti nanocomposite surface layer sequentially deposited on a substrate surface. The a-C:Ti ultrahard nanolayered thin film prepared by this invention achieves multi-layer stacking at the microscale by controlling the periodic modulation structure of the bonding layer, intermediate layer, and transition layer, effectively suppressing dislocation and crack propagation. Through Ti doping modification and gradient periodic modulation structure design, the internal stress of the film is reduced, improving its bonding strength, wear resistance, and toughness, reducing the risk of coating cracking or peeling, and enhancing the film's service stability. The a-C:Ti ultrahard nanolayered thin film of this invention is particularly suitable for applications such as precision machining tool coatings, surface strengthening of aero-engine gears and bearings, and wear protection of microelectromechanical systems (MEMS).

The invention discloses a preparation method of titanium-doped iron phosphate, and belongs to the field of inorganic material synthesis. According to the method, titanium tetrachloride, ferric trichloride, phosphoric acid and ferric oxide serve as main raw materials, and the titanium-doped ferric phosphate material is prepared through the steps of solution preparation, mixed reaction, precipitation separation, washing and drying, sintering treatment and the like. The preparation method has the advantages of simple process, low cost, uniform doping and the like, and is suitable for industrial production.

This invention provides a titanium-doped sodium iron pyrophosphate precursor, its preparation method, and a battery. The preparation method includes the following steps: introducing a mixed iron-titanium metal source solution, a phosphorus source solution, a pyrophosphate source solution, an oxidant solution, and a pH adjuster into a base solution to perform a co-precipitation reaction, thereby obtaining the titanium-doped sodium iron pyrophosphate precursor. The mixed iron-titanium metal source solution includes an iron source, a titanium source, a bimetallic complexing agent, and a titanium anchoring agent. The bimetallic complexing agent includes an alkanolamine compound, and the titanium anchoring agent includes an organophosphonic acid compound. The preparation method of this invention introduces titanium during the co-precipitation reaction, simultaneously adding specific metal complexing agents and titanium anchoring agents to achieve uniform bulk phase doping of titanium. This fundamentally regulates the electronic structure of the material, improves its electronic conductivity, and solves the problems of poor battery rate performance due to the poor conductivity of sodium iron pyrophosphate, as well as the problems existing in solid-state synthesis.

Ti-doped sapphire on arbitrary substrates is provided by Ti-doping an undoped sapphire wafer, then layer transferring part of the resulting doped surface region to another substrate. The Ti-doping can be laterally uniform or laterally patterned. Improved control over the vertical doping uniformity and / or lateral doping contrast can be provided by appropriately positioning the top and bottom surfaces of the layer to be transferred relative to the doping profile. For well-characterized doping profiles this can be done by defining the depths of the top and bottom surfaces of the layer to be transferred, since the characterization can relate doping concentration to depth.

This invention provides a high-conductivity, ultrathin carbon layer high-compact lithium iron phosphate processing method, relating to the field of lithium-ion battery material preparation technology. The method includes: firstly, mixing and carbonizing asphalt, phenolic resin, and sodium chloride using wet ball milling; using sodium chloride as a pore-forming template to prepare a first carbon source with a porous structure; then mixing iron phosphate, lithium source, phosphorus source, and titanium citrate as a second carbon source, and adjusting the pH to 8-10 to induce structural changes in titanium citrate to achieve lattice titanium doping; finally, adding the first carbon source to the mixture, followed by grinding, drying, and sintering under an inert atmosphere to obtain the lithium iron phosphate cathode material. This invention effectively solves the problem of low compaction density caused by excessively thick carbon layers through the synergistic effect of dual carbon sources and pH control technology, significantly improving the material's conductivity and ion diffusion rate while achieving high compaction density and excellent electrochemical performance.

The invention discloses a titanium-doped zirconium MOF molecularly imprinted electrochemical luminescence sensor for high-sensitivity detection of HER2, and a preparation and detection method thereof, and belongs to the technical field of detection. A titanium-doped zirconium-based metal organic framework (Ti-Zr-TPE MOF) is dispensed on the surface of a working electrode to serve as a luminescent material, Ti-Zr-TPE realizes luminous intensity multiplication in an aggregation state compared with Zr-TPE by further enhancing an intra-molecular motion limited (RIM) mechanism, and a luminous body preparation process, co-reactant screening and detection parameters (such as potential scanning rate and pH value) are systematically optimized, so that the luminous intensity of Ti-Zr-TPE is improved. A set of stable Ti (at) Zr-TPE luminescent system is formed. Meanwhile, dopamine (DA) is used as a functional monomer, and HER2 is subjected to molecular imprinting through a molecular imprinting technology, so that the electrochemical luminescence sensor of a quenching system is constructed. The luminescent material based on the novel tetraphenyl ethylene (TPE) derivative has the advantages of high luminescent intensity, low background signal, high stability and specificity, simplicity and convenience in operation and the like, and has obvious advantages compared with a previously developed sensor for detecting HER2. According to the invention, quantitative detection of HER2 can be realized, and an innovative solution is provided for clinical early warning.

This invention, entitled "A Preparation Method and Application of Titanium-Doped Iron Oxide Red," belongs to the field of lithium-ion battery cathode material technology. The preparation method involves: controlling the titanium content of ferrous sulfate, a byproduct of titanium dioxide production; precipitating and removing impurities from it with Fe and Ti elements; adjusting the pH; and adding Fe... 2+ Heating, filtration, washing, and drying yield titanium-doped iron oxide red precursor powder. This invention uses ferrous sulfate, a byproduct of titanium dioxide production, as the iron source and utilizes its titanium impurities for in-situ titanium doping, thus producing high-purity titanium-doped iron oxide red with adjustable titanium content, high purity, and low impurity content. Furthermore, the entire preparation process of titanium-doped iron oxide red is simple, has a short production time, and is low in cost.

The invention discloses a titanium fluoride doped ferric oxide photo-anode and a preparation method and application thereof, and belongs to the technical field of photoelectrochemistry. The preparation method of the titanium fluoride doped ferric oxide photo-anode comprises the following steps: placing conductive glass in a mixed solution of an iron source and a titanium source, carrying out a hydrothermal reaction, and calcining to obtain a Ti-Fe2O3 photo-anode; and carrying out fluorination treatment on the Ti-Fe2O3 photo-anode, so as to obtain the titanium fluoride doped ferric oxide photo-anode. The titanium fluoride doped ferric oxide photo-anode prepared by the invention can be combined with a photoelectric detection technology to effectively detect voltage in glucose solutions with different concentrations, and the titanium fluoride doped ferric oxide photo-anode has the properties of visible light response, higher photoelectric conversion efficiency, organic matter catalytic oxidation efficiency, long-time working stability and the like; the titanium fluoride doped iron oxide photoanode prepared by the invention provides an analysis method with simple detection steps for effective voltage detection of glucose.

The invention relates to a titanium-doped lithium manganate self-supporting electrode as well as a preparation method and application thereof. The self-supporting electrode comprises a porous titanium fiber matrix and a titanium-doped lithium manganate nanosheet active layer which grows on the surface and in pore channels of the porous titanium fiber matrix in situ, and an overall conductive self-supporting electrode structure is formed. Wherein lithium manganate is of a spinel structure, the titanium element is introduced into lithium manganate crystal lattices in a doping mode, and the doping molar ratio of the titanium element is 1%-10% of the molar weight of the manganese element. Compared with the prior art, the method has the advantages that an integral conductive structure without a binder can be formed, the method can be applied to a capacitive deionization system, and efficient and selective recovery of lithium ions in a lithium-containing solution is realized.

The application discloses modified sodium iron pyrophosphate phosphate, a preparation method, application, slurry, an electrode piece and a battery. The preparation method of the modified sodium iron pyrophosphate phosphate comprises the following steps: performing gas phase deposition of powder on an Al2O3 nano layer oriented growth (010) crystal face to obtain the modified sodium iron pyrophosphate phosphate; and the powder is manganese and titanium doped sodium iron pyrophosphate phosphate powder containing a fluorinated layer on the surface. Through the triple synergy of Mn / Ti double site doping, crystal face selective Al2O3 coating and gas phase fluorination, the effects of improving electronic conductivity, inhibiting electrolyte interface side reactions and improving the low-temperature performance of the battery are achieved.

The present invention discloses a layered polysulfide positive electrode material, a preparation method and an application thereof. The chemical formula of the layered polysulfide is Nb3TiP2S 18 Se3, Nb3TiP2S 18 Se3 is obtained by the matrix material Nb4P2S 21 Ti and Se co-doping is performed, where Ti occupies the Nb site and Se occupies the S site. As a positive electrode material, Ti doping can stabilize Nb4P2S 21 The structure of Se doping can improve the conductivity. By mixing Nb or NbS2, Ti, P or P2S5 and S, Se as raw materials, reacting under vacuum and high temperature conditions to obtain Nb3TiP2S with nano-granular morphology. 18 Se3 positive electrode material, compared with the undoped sample Nb4P2S 21 , the prepared Nb3TiP2S 18 Se3 positive electrode material has better electrochemical performance.

The present invention relates to a method for producing a conductive, Ti-doped MoOx coating, with 2 ≤ x ≤ 3, a Ti:Mo ratio from 1 to 99 mol%, on a particulate substrate by gas phase deposition, comprising the steps: a. Providing the particulate substrate; b. contacting it with vaporised Ti and Mo precursors, thereby forming precursor material layer; c. contacting the precursor layer with a vaporized oxidant and react with the precursor layer at a temperature T1 allowing for removal of ligands from the precursor(s), yielding a Ti-doped MoOx layer on the substrate surface; d. carrying out steps b. - c. for multiple cycles to stack layers of the coating until a coating thickness d1 between 0.1 and 50 nm is obtained; and e. annealing the coating at elevated temperatures T2.

The invention discloses a high-titanium-doped lithium niobate target material, a preparation method thereof and a sensor, and the preparation method comprises the following steps: adding an acidic lithium-containing solution into a mixed solution of titanium and niobium, and reacting to obtain gel; performing heat treatment on the gel to obtain powder; and preparing the high-titanium doped lithium niobate target material according to the powder. The invention provides a wet chemical method for preparing the Ti-doped LiNbO3 target material, a high-density and fine-grain target material microstructure is easy to obtain, elements are uniformly distributed, and a relatively high Ti element proportion can be doped. Besides, the Ti-doped LiNbO3 piezoelectric coating obtained on the basis of the high-titanium-doped lithium niobate target material is extremely high in substance purity and has very excellent piezoelectric performance, and the piezoelectric constant d33 is greatly increased and reaches 12.4 pC / N.

The invention discloses a preparation method of a Ti < 4 + >-doped sodium manganate material and application of the Ti < 4 + >-doped sodium manganate material in a sodium ion battery, and provides an improved strategy of titanium doping through a high-temperature solid-phase reaction, and the improved strategy changes the electronic structure and morphology of the material at the same time. Due to the addition of Ti < 4 + >, the interlayer spacing is increased, rapid diffusion of sodium ions is promoted, the structural evolution from a two-dimensional (2D) flat plate to a one-dimensional (1D) nanorod is also caused, and an additional sodium ion storage position is created. The electrochemical performance of the Na0. 7MnO2.05 positive electrode material is jointly improved through the synergistic effect of electronic modulation, Ti < 4 + > doping and nanostructure engineering. The preparation method is simple, raw materials are easy to obtain, and the process is simple. Tests show that a battery using the doped modified positive electrode material has a good capacity retention rate, and the sodium ion battery positive electrode material has excellent structural stability and cycle performance, so that the actual service life of the sodium ion battery is effectively prolonged.

The invention discloses a titanium-doped nickel oxide nanosheet gas sensor and a preparation method thereof, and relates to the technical field of gas sensors, the titanium-doped nickel oxide nanosheet gas sensor comprises a substrate and a plurality of interdigital electrodes, the interdigital electrodes are covered with a gas-sensitive coating, the gas-sensitive coating is a titanium-doped nickel oxide nanosheet composite material, and the titanium-doped nickel oxide nanosheet composite material is a titanium-doped nickel oxide nanosheet composite material. The substrate is one of a silicon substrate, a polymer substrate, a ceramic substrate or a sapphire substrate, the interdigital electrodes are obtained by a micromachining process, the distance between positive and negative electrodes in the interdigital electrodes is 200-900 microns, the distance between the two interdigital electrodes is 50-500 microns, and the gas-sensitive coating comprises the following components in percentage by mass: 0-50% of nickel element and 50-100% of nickel oxide nanosheets. The preparation method has the advantages that the titanium element is doped in the nickel oxide nanosheet in situ to prepare the gas sensor based on the titanium-doped nickel oxide nanosheet, so that the defects of low sensitivity and poor selectivity of a sensor prepared from a traditional single nickel oxide material are overcome; the sensor has reliable stability and good gas selectivity.

The invention provides a titanium-doped NFPP positive electrode material, a precursor of the titanium-doped NFPP positive electrode material, a preparation method of the titanium-doped NFPP positive electrode material and a sodium ion battery, and the preparation method comprises the following steps: (1) mixing sodium phosphate, sodium pyrophosphate and a first solvent to form a solution A; and (2) introducing the solution A, hydrogen peroxide and a sodium hydroxide solution into a base solution containing ferrous sulfate and titanium ions, and carrying out a co-precipitation reaction in a protective atmosphere to prepare the titanium-doped NFPP positive electrode material precursor. The titanium-doped NFPP positive electrode material precursor with uniformly distributed positive electrode material elements can be obtained, and the rate capability of the positive electrode material is improved.

The invention provides a modified positive electrode precursor as well as a preparation method and application thereof. The modified positive electrode precursor comprises a titanium-doped core and a niobium-doped coating layer arranged on the titanium-doped surface, the interior of the titanium-doped inner core is of a hollow structure. The modified positive electrode precursor has the structure of the titanium-doped hollow core and the niobium-doped coating layer, the structural stability of the hollow core can be ensured by uniform doping of titanium, a buffer space is provided for lithium ion intercalation / deintercalation in the charging and discharging process under the condition of ensuring the structural stability, the risk of particle breakage is reduced, and the performance of the lithium ion battery is improved. The lithium ion diffusion distance can be shortened, the rate capability can be improved, niobium is uniformly doped in the coating layer, niobium ions generate Li-Nb-O spinel phases on the surfaces of particles, electrolyte decomposition and transition metal dissolution are inhibited, meanwhile, rapid transmission of surface Li < + > can be promoted, the interface impedance can be reduced, and the capacity of the material can be improved.

The invention discloses a preparation method of a Ti-doped CsWO nanocrystal material for automobile heat insulation and ultraviolet protection, all Ti-doped CsWO nanocrystal systems are successfully prepared through a solid phase method, the Ti doping concentration of 1.354 at.% is innovatively introduced, and breakthrough improvement of the material performance is achieved. According to the technical scheme, a crystal structure is regulated and controlled through Ti doping, the carrier concentration is promoted to be increased to 3.2 * 10 cm < 3 >, meanwhile, oxygen vacancy formation and W < 5 + > proportion are induced to be increased to 18.6%, and the local surface plasmon resonance effect is effectively enhanced. Through testing, the transmittance of the optimized material in the visible light wave band of 380-780 nm reaches 86%, the near-infrared shielding rate exceeds 93%, the ultraviolet blocking efficiency reaches 99.2%, and the comprehensive optical performance of the material is improved by 35% compared with that of an undoped sample. The film is particularly suitable for the field of automobile glass film pasting, and active heat radiation shielding can be achieved while high light transmittance is guaranteed.

The application discloses a high-stability sodium-based Ni x Fe y Mn z O2 positive electrode material and a preparation method thereof, and belongs to the technical field of sodium ion battery positive electrode materials. The positive electrode material comprises a NaNi x Fe y Mn z O2 matrix, Ti elements doped in the matrix and a composite layer coated on the surface of the matrix. The preparation method adopts a sol-gel method combined with a segmented sintering process: nickel source, iron source and manganese source are dissolved, and titanium source is added, and a crystal boundary strengthening layer is formed through gelation, drying and calcination; subsequently, titanium source and silicon source are added for ball milling, and a surface coating layer is formed through sintering, and finally, annealing is performed under nitrogen protection. Through the three-in-one synergistic modification of bulk Ti doping, Na2TiO3 strengthening of the crystal boundary and surface coating, lattice distortion and particle cracking are effectively inhibited, the cycle capacity retention rate reaches 88-93%, the initial specific discharge capacity is high, the interface impedance is low, the process is compatible with the existing large-scale production process, and the positive electrode material has excellent industrial application prospect.

This invention discloses a titanium fluoride-doped iron oxide photoanode, its preparation method, and its application, belonging to the field of photoelectrochemical technology. The preparation steps of the titanium fluoride-doped iron oxide photoanode are as follows: Conductive glass is placed in a mixture of iron and titanium sources, subjected to a hydrothermal reaction, and calcined to obtain a Ti-Fe₂O₃ photoanode; the Ti-Fe₂O₃ photoanode is then fluorinated to obtain the titanium fluoride-doped iron oxide photoanode. The titanium fluoride-doped iron oxide photoanode prepared by this invention can effectively detect voltage in glucose solutions of different concentrations using photoelectric detection technology. Furthermore, the titanium fluoride-doped iron oxide photoanode exhibits visible light response, higher photoelectric conversion efficiency, higher catalytic oxidation efficiency for organic matter, and long-term operational stability. The titanium fluoride-doped iron oxide photoanode prepared by this invention provides a simple analytical method for the effective voltage detection of glucose.

The invention discloses a preparation method of a titanium-manganese dioxide-doped cathode for a tantalum capacitor, which comprises the following steps of: forming a dielectric oxide film layer on the surface of a valve metal block through formation treatment; preparing a first conductive layer on the dielectric oxide film layer; a titanium-doped manganese dioxide cathode layer is formed on the first conductive layer. The manganese dioxide cathode layer is prepared from the electrolyte containing the titanium dopant through an electrochemical deposition method, titanium atoms enter manganese dioxide crystal lattices in a substitution doping or gap doping mode, the conductivity of manganese dioxide is improved, and an interface between the manganese dioxide cathode layer and the first conductive layer is compact and free of pores. Therefore, the finally prepared solid electrolytic capacitor is lower in equivalent series resistance (ESR), is especially suitable for high-frequency and large-current circuits, and reduces energy loss and heating.

The invention relates to the field of lithium ion batteries, in particular to a modified medium nickel positive electrode material and a preparation method and application thereof. The modified medium nickel positive electrode material provided by the invention comprises a base material and a coating layer coating the surface of the base material, the base material is a titanium-doped LiNi < 0.6 > Co < 0.2 > Mn < 0.2 > O < 2 > precursor material, and the coating layer is a coating layer formed by a lutetium source. Through bulk phase titanium doping, generation of intragranular microcracks in the circulation process is reduced, so that the circulation stability of the material is improved; and meanwhile, surface residual lithium and lutetium generated in the preparation process of the matrix material are utilized to generate a composite coating layer, so that an electrode and electrolyte can be physically isolated, interface side reaction is inhibited, interface lattice oxygen loss is inhibited, and lithium ion transmission is accelerated to optimize rate performance.

The application discloses a method for improving cycle stability of a lithium-rich manganese-based positive electrode material, a positive electrode material and application, and comprises the following steps: A, grinding lithium-rich manganese-based positive electrode material precursors and lithium salt until they are uniformly mixed; B, adding a titanium source to obtain uniformly mixed powder; C, pre-burning and high-temperature calcining are performed to obtain the lithium-rich manganese-based positive electrode material, wherein the pre-burning is performed in two stages, the first-stage pre-burning temperature is 300-400 DEG C, the second-stage pre-burning temperature is 400-500 DEG C, and the high-temperature calcining temperature is 850-900 DEG C. The application reduces cation mixing through titanium doping, and the cycle stability of the lithium-rich manganese-based positive electrode material is significantly improved by cooperating with an improved calcining process, so that the defects in the prior art are overcome.

The invention relates to a multi-element doped graphite-like composite carbon film and a method for realizing heavy-load super-lubricity. The multi-element doped graphite-like composite carbon film comprises a Ti base layer, a gradient transition layer and a working layer which are sequentially deposited on the surface of a substrate, wherein the gradient transition layer is a gradient transition layer of Ti, Al and Si; and the working layer is a GLC film doped with Al, Si and Ti. The problems of super-lubricity failure, insufficient film-substrate binding force and heterogeneous interface mismatch under ultrahigh pressure (greater than or equal to 2GPa) are solved.

The application provides a titanium-doped high-nickel ternary positive electrode material and a preparation method thereof. The titanium-doped high-nickel ternary positive electrode material comprises a high-nickel ternary positive electrode material and a titanium-doped element; the content of the titanium-doped element accounts for 0.5-5wt% of the titanium-doped high-nickel ternary positive electrode material. The preparation steps comprise the following steps: preparing a nickel-cobalt-manganese hydroxide precursor; mixing the nickel-cobalt-manganese hydroxide precursor with a lithium source uniformly and then sintering and cooling to obtain a high-nickel ternary positive electrode material; mixing the high-nickel ternary positive electrode material with a reducing titanium source and sintering to obtain the titanium-doped high-nickel ternary positive electrode material. The reducing titanium is used to modify the high-nickel ternary material, the more stable Ni 2+ is enriched on the surface of the material as a protective layer, the corrosion of the electrolyte to the material is reduced, and the surface stability of the material is improved; the titanium element is more easily introduced into the material crystal lattice than general doping methods; the material crystal lattice structure strength is improved through the strong Ti-O bond, and excellent cycle stability and rate performance are obtained.