64results about How to "High ion conductivity" patented technology

The invention provides a halide solid-state electrolyte and a preparation method and application thereof. The halide solid-state electrolyte comprises a halide solid-state electrolyte inner core and a halide solid-state electrolyte outer core, and the hydrophobic layer is uniformly coated on the halide solid electrolyte core, and the hydrophobic layer comprises bis-hexadecyl phosphate. According to the halide solid electrolyte as well as the preparation method and the application thereof, the air stability of the halide solid electrolyte can be remarkably improved, the cycle performance of an all-solid-state lithium ion battery is improved, the manufacturing process is simple, and the cost is relatively low.

The invention provides an all-solid-state battery and application thereof. The all-solid-state battery comprises a positive pole piece and a negative pole piece, a protective layer is arranged on the surface of the lithium metal negative electrode; and the solid-state electrolyte membrane is arranged between the positive pole piece and the lithium metal negative pole, and the solid-state electrolyte membrane comprises sulfide solid-state electrolyte. According to the all-solid-state battery and the application thereof provided by the invention, the interface stability between the lithium metal negative electrode and the solid electrolyte can be enhanced, side reactions can be reduced, and the all-solid-state battery with long cycle performance can be obtained by combining the all-solid-state battery with the sulfide solid electrolyte provided by the invention.

The invention discloses a colorful stretchable electrochromic device based on gold nanowires and a preparation method thereof.The preparation method adopts a wet process to prepare vertically-arranged gold nanowire electrodes, the gold nanowire electrodes are embedded into a flexible stretchable substrate, the device keeps high conductivity and good optical transparency, and meanwhile, the device has the advantages of being high in electrochromic efficiency, good in electrical conductivity and good in optical transparency. Excellent mechanical performance and structural stability are realized; the solid electrolyte is used to avoid the problems of volatilization and leakage of the liquid electrolyte, so that the reliability and the service life of the device are remarkably improved; according to the electrochromic device, different organic electrochromic materials can be deposited through electro-polymerization to achieve colorful changes in a wide spectral range, the spectral range covers a region from visible light to near-infrared light, and the electrochromic device is widely applied to the fields of flexible display devices, optics and the like due to the patterned design and the colorful display function of the electrochromic device; in addition, by optimizing the embedding mode of the gold nanowire and the substrate, the device can maintain stable electrical and optical performance under the conditions of multiple times of stretching and complex mechanical deformation.

The invention discloses an electrolyte, a battery and electric equipment, the electrolyte comprises a first additive, a lithium salt and a solvent, and the first additive comprises at least one of thioimidazolidinone compounds containing carbon-carbon double bonds. The electrolyte comprises the first additive, and the first additive has multifunctional effects of positive and negative electrode film forming and transition metal ion complexing, so that an interfacial film formed by a positive electrode and a negative electrode has excellent ion conductivity and film forming stability, and DCR increase in the charging and discharging process can be effectively inhibited; meanwhile, dissolution and deposition of transition metal ions in the positive electrode material at high temperature / high pressure can be effectively inhibited, so that the high-temperature cycle performance and the storage performance of the battery are improved.

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 discloses an oxygen-rich thiomolybdate compound, a preparation method and application of the oxygen-rich thiomolybdate compound in ion conduction, and belongs to the field of synthesis of multi-metal oxygen clusters. The oxygen-rich thiomolybdate compound is synthesized by adopting a one-pot method, and ionic conductivity tests are carried out on the synthesized oxygen-rich thiomolybdate compound at different temperatures and humidity, so that the oxygen-rich thiomolybdate compound is found to have relatively high ionic conductivity in a wide temperature range; moreover, typical temperature and humidity dependent ionic conductivity is presented, and the conductivity is increased along with the increase of the temperature and increased along with the increase of the humidity. The ionic conductivity can reach 8.6 * 10 <-3 > S cm <-1 > under the conditions that the humidity is 80% and the temperature is 85 DEG C, so that the compound has a good prospect of serving as an efficient ionic conductor. The preparation method disclosed by the invention is simple in process, the product is easy to crystallize, the reaction time is short, the synthesis yield is high, and the prepared oxygen-rich thiomolybdate compound has good ionic conductivity and can be widely applied to ionic conduction materials.

The application provides a high-nickel ternary material modification method and a high-nickel positive electrode material with a nitrogen-oxygen coating layer, and relates to the field of lithium ion batteries. In the high-nickel ternary material, surface lattice oxygen is gradually replaced by nitrogen atoms in a high-temperature long-time calcination process in a nitrogen-oxygen mixed atmosphere, so that a nitrogen-oxygen layer is formed on the surface, which is beneficial to the delocalization of electrons, thereby endowing the material with excellent electronic conductivity; meanwhile, the presence of the nitrogen-oxygen layer inhibits the transformation of the surface layer structure into a rock salt phase structure, which is beneficial to realizing efficient ion transport. The formation of the nitrogen-oxygen layer on the surface of the high-nickel ternary material can simultaneously improve the electronic and ionic conduction of the surface of the high-nickel positive electrode material, inhibit the interface side reaction, relieve the volume change, and thereby improve the cycle stability of the battery.

The present invention provides a negative electrode active layer, a double negative electrode active layer, a negative electrode plate and a lithium ion battery. The negative electrode active layer includes a carbon-modified lithium metasilicate binder, and the content of the carbon-modified lithium metasilicate binder is 2.4% to 3.2% based on the total weight of the negative electrode active layer as 100%. The negative electrode active layer of a lithium ion battery provided by the present invention, which includes carbon-modified lithium metasilicate, can be used as a binder to construct a cross-linked network in the negative electrode active layer, improve the internal resistance, adhesion, liquid absorption capacity, expansion and ion conductivity of the negative electrode plate, and finally obtain a lithium ion battery that can simultaneously take into account high rate performance, low internal resistance and long cycle.

The invention discloses a preparation method and application of a lithium iron phosphate composite material, and relates to the technical field of preparation of lithium iron phosphate composites.The preparation method comprises the following steps that 1, lithium iron phosphate, carbon nanotubes and bacterial cellulose are mixed according to the mass ratio of (7-9): (0.5-1.5): (0.5-1.5), and then the mixture is placed in a mold; (2) horizontally placing the mold containing the sample in a freezing refrigerator, and freezing at-60 DEG C to-50 DEG C for 12-24 hours to ensure that the mold is completely frozen and crystallized; and (3) taking out the sample which is completely frozen and crystallized, putting the sample into a vacuum freeze dryer, and carrying out drying treatment for 24-48 hours at the temperature of 60 DEG C below zero to 50 DEG C below zero to obtain the novel lithium iron phosphate composite material. The lithium iron phosphate composite material prepared by the invention has excellent ionic conductivity, can be applied to lithium extraction of salt lake brine, and has excellent lithium extraction performance.

The invention relates to Li-beta ''aluminum oxide solid electrolyte ceramic and a preparation method thereof. The method comprises the following steps: obtaining Na-beta'' aluminum oxide ceramic precursor powder; carrying out molding treatment on the Na-beta ''aluminum oxide ceramic precursor powder to obtain a Na-beta'' aluminum oxide ceramic green body; and carrying out buried sintering on the Na-beta ''aluminum oxide ceramic green body to obtain the Na-beta'' aluminum oxide solid electrolyte ceramic, and embedding the Na-beta ''alumina solid electrolyte ceramic into a mixture of a lithium oxide and a first aluminum oxide, and carrying out an ion exchange reaction at a set temperature to obtain the Li-beta'' alumina solid electrolyte ceramic. The preparation method of the Li-beta ''aluminum oxide solid electrolyte ceramic provided by the embodiment of the invention not only can improve the sintered body density of the solid electrolyte ceramic, but also can maintain good stability and excellent ionic conductivity, namely, improve the comprehensive performance of the Li-beta'' aluminum oxide solid electrolyte ceramic.

The application discloses a manganese iron lithium phosphate composite positive electrode material with Mn ion self-compensation and multiple interception functions and a preparation method thereof. The manganese iron lithium phosphate composite positive electrode material is composed of a manganese iron lithium phosphate positive electrode material and functional composite film micro-powder loaded on the surface and between the particles of the manganese iron lithium phosphate positive electrode material. The functional composite film of the functional composite film micro-powder is prepared from Na-merolite powder through Mn ion exchange, grafting and copolymerization, lithiumation and PVA composite film preparation. The manganese iron lithium phosphate composite positive electrode material is prepared from the manganese iron lithium phosphate positive electrode material and the functional composite film through mixing, crushing and freeze-drying. The manganese iron lithium phosphate composite positive electrode material realizes the inhibition of the dissolution of Mn 2+ in the manganese iron lithium phosphate positive electrode material from the source, improves the ion conduction performance and the cycle stability of the manganese iron lithium phosphate positive electrode material, and has the advantages of high capacity, long cycle life, high safety and the like.

The invention discloses a silicon negative electrode active material which sequentially comprises a silicon-based material inner core, a flexible solid electrolyte or gel electrolyte middle layer and a carbon-coated outer layer from inside to outside, the flexible solid electrolyte or gel electrolyte middle layer comprises a conductive agent, and the conductive agent comprises a carbon nanotube. According to the silicon negative electrode active material, the surface of the silicon-based material is coated with the flexible solid-state or gel-state electrolyte, so that the volume change of the negative electrode active material in the charging and discharging process is effectively relieved, the electrolyte is isolated, the stability of the negative electrode active material is improved, and the negative electrode active material has relatively high reversible specific capacity and relatively high specific surface area; and excellent long cycle performance is shown.

The invention discloses a weaving process of diaphragm cloth for hydrogen production. The weaving process comprises the following steps: S1, preparing fibers; step S2, cotton carding; s3, drawing is carried out; step S4, roving; step S5, spinning; step S6, self-complexing; step S7, two-for-one twisting; step S8, weaving; step S9, carrying out post-treatment; according to the weaving process of the diaphragm cloth for hydrogen production, the diaphragm cloth with high ionic conductivity, good mechanical strength and wear resistance and excellent air tightness is prepared by optimizing the fiber specification and the spinning step, the process is simple, easy to operate and suitable for large-scale industrial production, and a high-quality diaphragm material is provided for an alkaline electrolysis water hydrogen production system.

The invention belongs to the technical field of solid-state batteries, and discloses an alloy ion / electron mixed conductor and application thereof. The mixed conductor is prepared by taking antimony powder, lithium powder or sodium powder and at least one metal powder of lanthanum, scandium, yttrium, aluminum, gallium and indium as raw materials through ball-milling mixing, tube sealing annealing and quenching treatment. When the mixed conductor is used as an interlayer of a lithium / sodium metal negative electrode and an electrolyte in the solid-state battery, the growth of lithium / sodium dendrites can be effectively inhibited through a specific nucleation mechanism, and the utilization rate of the metal negative electrode is improved; when the conductive additive is used as a conductive additive of a silicon, red phosphorus or graphite / hard carbon negative electrode material, by virtue of high ion / electron conductivity and good potential stability, the interface side reaction is reduced, and the rate capability and the cycling stability of the negative electrode material are remarkably improved.

The invention belongs to the field of material chemical engineering, and particularly relates to a preparation method and application of a multi-component SEI (solid electrolyte interface) film. Various substances are carefully screened to form a multi-component system, and an accurate mass ratio is determined; due to the combination, all the components have a synergistic effect, and the comprehensive performance of the SEI film is remarkably improved; operation is performed in a glove box with low water oxygen content, so that the raw materials are pure; the material can be widely applied to various batteries such as electric vehicles and energy storage batteries to improve the charge-discharge efficiency, stability and cycle life of the batteries, and provides powerful support for the technical progress of the batteries.

The invention discloses a high-performance composite polypropylene lithium battery diaphragm, and relates to the technical field of lithium battery diaphragms.The high-performance composite polypropylene lithium battery diaphragm comprises base layers, micropores are formed in the base layers, and a middle layer is arranged between the two base layers. The base layer takes polypropylene as a main material to ensure excellent mechanical properties and thermal stability, the middle layer adopts an inorganic coating film to enhance the barrier property and thermal stability of the diaphragm, and the surface layer adopts a polytetrafluoroethylene film to improve the corrosion resistance and wettability of the diaphragm; according to the high-performance composite polypropylene lithium battery diaphragm, in order to further improve the wettability of the diaphragm to electrolyte and the ion conduction performance, the hydrophilic layer adopts polyoxyethylene, the reinforcing layer adopts a hard framework, and polyvinylidene fluoride is used as a binder, so that the structural stability and the mechanical property of the diaphragm are remarkably enhanced; the mechanical property, the thermal stability and the electrochemical performance of the battery are comprehensively improved, the service life is prolonged, and the charge-discharge efficiency and the safety performance are improved.

The present invention relates to the field of battery technology, and specifically to a diaphragm and a battery including the diaphragm. The diaphragm includes a substrate and a ceramic layer located on one or both sides of the substrate, the ceramic layer includes inorganic particles and a first polymer, the ceramic layer is a porous structure, and the porous structure includes pores with a diameter of ≥0.5μm. Within a range of 100μm×100μm arbitrarily selected on the surface of the ceramic layer, the number of pores with a diameter of ≥0.5μm is 10-800 and the number of the first polymer is 10-500; the diaphragm satisfies the following relationship: 1<D1 / D2<20, wherein D1 is the average diameter of pores with a diameter of ≥0.5μm in the ceramic layer, in μm; D2 is the average particle size of the inorganic particles, in μm. The battery including the diaphragm of the present invention can have both high long cycle performance and fast charging performance without affecting self-discharge and safety performance.

The invention belongs to the technical field of batteries, and particularly relates to a battery cell and a formation method thereof, an energy storage device and a power utilization device. The battery cell formation method comprises the following steps: executing multi-stage charging formation operation at a preset temperature: charging a to-be-charged battery cell with a first charging current until the to-be-charged battery cell increases a first charge state; charging with the second charging current to the Nth charging current in sequence until the state of charge reaches the target state of charge; the first charging current to the Nth charging current are gradually increased in sequence, and at least one of the second charging current to the Nth charging current is not less than 0.5 C. The formation time of the battery is obviously shortened, the production efficiency is improved, and the manufacturing cost is reduced; meanwhile, through the stepped current design and the temperature and pressure synergistic effect, the technical problems that electrolyte infiltration in a large-size battery cell is uneven and gas is difficult to discharge can be effectively solved, a more uniform and compact SEI film is formed, the consistency of the battery cell is improved, the cycle life of the battery cell is prolonged, and the safety performance of the battery cell is improved.

The invention provides a sulfide solid-state electrolyte and a preparation method and application thereof. The sulfide solid-state electrolyte comprises a sulfide solid-state electrolyte inner core and a sulfide solid-state electrolyte outer core, and the hydrophobic layer is uniformly coated on the sulfide solid electrolyte core, and the hydrophobic layer comprises bis-hexadecyl phosphate. According to the sulfide solid-state electrolyte and the preparation method and application thereof, the air stability of the sulfide solid-state electrolyte can be remarkably improved, generation of toxic gas is reduced, the ionic conductivity of the sulfide solid-state electrolyte is not greatly reduced, the cycle performance of an all-solid-state lithium ion battery is improved, the manufacturing process is simple, and the cost is low. And the cost is low.

The application relates to the technical field of all-solid-state batteries, and particularly relates to a high-pressure-resistant solid electrolyte film, a preparation method thereof and an all-solid-state battery. The high-pressure-resistant solid electrolyte film comprises a modified porous non-woven fabric skeleton layer and halide-based solid electrolyte layers and sulfide electrolyte layers arranged on the two sides of the modified porous non-woven fabric skeleton layer respectively; the modified porous non-woven fabric skeleton layer comprises a porous non-woven fabric substrate and a polymer coated on the fiber surface; the halide-based solid electrolyte layer comprises a halide electrolyte and / or an oxyhalide electrolyte. The sandwich structure can improve the overall electrochemical stability window of the high-pressure-resistant solid electrolyte film, inhibit the electrolyte oxidation decomposition and interface side reaction under high pressure, improve the cycle life of the battery and the high-pressure working condition adaptability; and the modified porous non-woven fabric skeleton layer contains a polymer which has good interface compatibility with the halide-based solid electrolyte layer and the sulfide electrolyte layer and is easy to be hot-melt, thereby forming a composite electrolyte film with an integrated structure and greatly reducing the interface contact impedance.

The present invention relates to a sulfide solid electrolyte containing a sulfide-based glass phase, the sulfide-based glass phase having an exothermic peak at which a highly ion-conductive crystal is precipitated when subjected to differential scanning calorimetry at a temperature increase rate of 5 DEG C / min, the exothermic peak being separable into two or more peaks, and the number of the exothermic peaks being two or more. Among the two or more peaks obtained by peak separation, the temperature difference between the peak top of the highest-temperature-side peak and the peak top of the lowest-temperature-side peak is 0.5 DEG C or more.

The application provides a sodium ion battery positive electrode material and a preparation method and application thereof, the sodium ion battery positive electrode material comprises an active material and a hydrophobic coating layer, and a coating source of the hydrophobic coating layer comprises a siloxane-based compound; the siloxane-based compound is used as the coating source of the hydrophobic coating layer, a compound containing -Si-O-Na is generated on the surface of the active material, the hydrophobic property and the environmental stability can be ensured at the same time, and the sodium ion battery obtained has high ion conduction capacity, so that the sodium ion battery has good cycle performance; meanwhile, the application is coated by using a molecular self-assembly method, the thickness does not change due to the change of the morphology of the material, the process requirement is low, and the cost is low.

The invention discloses a high-voltage-resistant gel polymer electrolyte for a supercapacitor and a preparation method and application thereof, and belongs to the technical field of supercapacitors. In the electrolyte, the high-pressure-resistant additive, the auxiliary additive, the lithium salt and the mixed solvent are reasonably matched. The high-pressure-resistant additive contains two key functional groups, namely trifluorosulfonyloxy and cyano, so that a stable multifunctional protective layer can be constructed on the interface of the positive electrode and the negative electrode, and the problem of interface degradation is solved. According to the preparation method, additives and lithium salt are added step by step, a cross-linked structure is finally formed on the surface of the electrode in situ, the binding force of the electrolyte and the electrode is enhanced, and smooth ion transmission is guaranteed. When the composite material is applied to preparation of a supercapacitor, the performance and stability of the supercapacitor under a high-voltage working condition can be improved, the energy density and the power density are improved, the service life is prolonged, the requirement of the market for the high-performance supercapacitor is met, and technical development and application of the supercapacitor are promoted.

The application belongs to the technical field of hydrogen energy conversion by electrolysis of water, and particularly relates to a doped nickel oxide modified polysulfone composite diaphragm material and a preparation method thereof, which comprises uniformly dispersing polysulfone in N-methyl pyrrolidone to obtain a polysulfone solution, adding PVP or PEG to the polysulfone solution, stirring until complete dissolution to obtain a mixed solution, adding a doped nickel oxide material to the mixed solution, stirring until complete uniform dispersion to obtain a casting solution, degassing the casting solution by stirring, laying the casting solution on the front end of a doctor blade, sliding the doctor blade at a uniform speed to uniformly spread the casting solution on the surface of a glass film to obtain a liquid membrane, pre-evaporating the liquid membrane in air, immersing the pre-evaporated liquid membrane in deionized water to solidify into a film, peeling off the film and cleaning to obtain the doped nickel oxide modified polysulfone composite diaphragm material. By introducing the doped nickel oxide as a functional modification material, the hydrophilicity and conductivity of the diaphragm are effectively improved.

The present invention discloses a lithium iron tungstate modified PEO-based composite solid electrolyte and a preparation method thereof, and a solid-state battery. The components of the composite solid electrolyte include: lithium iron tungstate, PEO, and a lithium-based electrolyte, wherein: the structural formula of lithium iron tungstate is Li x Fe y W z O m , where x:y:z is (2~5):(0.5~1.5):(1~4), and x+3y+6z=2m. Lithium iron tungstate is an inorganic ceramic material, which contains lithium ions in its structure. After being composite-modified with PEO-based composite solid electrolyte, it can effectively improve the ion transport performance of PEO-based solid electrolyte. In addition, inorganic ceramic lithium iron tungstate powder material will reduce the crystallinity of the polymer in the electrolyte, effectively improving the mechanical properties of the solid electrolyte. Furthermore, lithium iron tungstate, as a solid phase filler, increases the density of the solid electrolyte membrane, thereby avoiding short circuits in the battery.

This application provides a lithium-rich manganese-based cathode material, its preparation method, and an electrochemical device. The lithium-rich manganese-based cathode material includes a substrate material and a coating layer. The coating layer includes a lithium hexafluorozirconate coating layer located on the surface of the substrate material and a fluoride coating layer located on the side of the lithium hexafluorozirconate coating layer away from the substrate material. The chemical formula of the substrate material is Li(Li₂)₃. x Mn a Ni 1‑a‑ b Al b )O 2‑δ Where 0.05≤x≤0.33, 0

The invention discloses a lithium ion halide solid electrolyte material as well as a preparation method and application thereof. The chemical general formula of a halide solid electrolyte is Li < x > MC < 4-y > F < x + y >, wherein 0 < x < = 2; x is greater than or equal to-x and less than or equal to y, and M is selected from one or two of transition metal elements Hf and Zr. The invention discloses a preparation method of a lithium ion halide solid electrolyte material. The halide solid electrolyte is used for preparing a solid electrolyte or a composite positive electrode of a lithium ion all-solid-state battery. By introducing F, on one hand, non-crystallization of the electrolyte is promoted, which is a reason for remarkably improving the conductivity of the electrolyte, and on the other hand, as the electronegativity of F is large, the high-voltage stability of the electrolyte is enhanced, so that the lithium ion halide solid electrolyte provided by the invention can be used for improving the conductivity of the electrolyte. And in a solid-state battery system, the material has relatively high ion conduction capability and good high-voltage stability and mechanical stability.

The invention belongs to the technical field of sodium ion batteries, and particularly relates to a non-aqueous electrolyte and a sodium ion battery. The non-aqueous electrolyte comprises a sodium salt, a non-aqueous solvent and a composite additive, the composite additive comprises a first additive, a second additive and a third additive, the first additive is a compound containing sulfur-oxygen bonds in the structure, the second additive is a sodium salt compound, and the third additive is an imidazole compound. The positive ions are one or more of lithium ions, sodium ions, imidazolium positive ions and quaternary ammonium positive ions, and the negative ions are imidazole negative ions. Three additives are combined to serve as a composite additive, the obtained non-aqueous electrolyte can form a firm solid electrolyte interface film on the surfaces of the positive electrode and the negative electrode of the sodium ion battery, and hydrolysis of sodium salt in the electrolyte and battery expansion are effectively inhibited.

The invention belongs to the technical field of lithium ion battery positive electrode materials, and discloses a lithium manganese iron phosphate material with a solid-hollow composite structure and a preparation method thereof.The preparation method adopts a step-by-step reaction and co-sintering method, and comprises the steps that firstly, heterogeneous nucleation is achieved through the solubility product difference of manganese phosphate to form a hollow lithium manganese phosphate precursor; subsequently adding an iron source, a titanium source and other raw materials, and performing spray drying and inert atmosphere sintering to construct a composite structure of solid particles and hollow particles; the lithium manganese iron phosphate material with the solid-hollow composite structure has the characteristics that solid particles provide mechanical support, hollow microspheres increase ion conduction channels and a compact structure formed by a three-dimensional network, and the compaction density gt of a pole piece is realized; 2.5 g / cm < 3 > and 2C rate capacity retention rate gt; and the method has important new energy automobile and large-scale energy storage industrialization application value.

The present application discloses a binder, a negative-electrode slurry, a negative electrode, and a lithium-ion battery. In the present application, the binder comprises a first block polymer and a second block polymer. The first block polymer is a lithiated tetrablock polymer having a structure shown as B-C-B-A, wherein A represents a polymer block A, B represents a polymer block B, and C represents a polymer block C; the polymer block A is polymerized from alkenyl formic acid monomers; the polymer block B is polymerized from aromatic vinyl monomers; and the polymer block C is polymerized from acrylate monomers. The second block polymer is a lithiated triblock polymer having a structure shown as E-F-E, wherein E represents a polymer block E, and F represents a polymer block F; the polymer block E is polymerized from alkenyl formic acid monomers; and the polymer block F is polymerized from acrylate monomers. The binder provided by the present application has strong ion-conducting capability, simple components, low cost, suitable modulus, and thickening and dispersing effects.