28results about How to "Improve long cycle stability" patented technology

The invention belongs to the field of sodium-ion batteries, and discloses a sodium-ion battery electrolyte and a sodium-ion battery. The sodium-ion battery electrolyte comprises sodium salt, an organic solvent and an organic molecular additive shown in the following formula, wherein R1 to R5 are respectively and independently any one of F, Cl, Br, I, CN, H, OH, SH and NO2. A boron atom in the molecular structure of the additive is used as an electron-deficient center and can be preferentially complexed with anions or solvent molecules in the electrolyte to pre-stabilize an electrode interface; the bond energy of the B-O bond is moderate, so that the oxidation potential of the B-O bond is lower than that of a main body carbonate solvent, the B-O bond can be preferentially decomposed in the first charge-discharge process, and a thin, compact and highly stable positive electrode electrolyte interface film is formed on the surface of a positive electrode; the controllable substituent group on the benzene ring further regulates the decomposition potential of molecules through an electronic effect, so that the film forming time and the film property can be precisely regulated and controlled. The stable CEI can effectively inhibit continuous decomposition of the electrolyte at high temperature and high pressure, and the cycling stability of the battery in the high-temperature and high-pressure environment is remarkably improved.

The application provides a porous carbon nanofiber electrocatalyst loaded with cobalt / lanthanum hydroxide heterojunction and a preparation method. The preparation method comprises the following steps: adding 4,4-diamino diphenyl ether and pyromellitic dianhydride into a solvent, uniformly mixing, and preparing a polyamide acid precursor spinning solution; electrospinning the prepared polyamide acid precursor spinning solution to prepare polyamide acid nanofibers; immersing the prepared polyamide acid nanofibers in a mixed metal salt solution containing cobalt salt, lanthanum salt and zinc salt to prepare polyamide acid nanofiber precursors loaded with metal ions; and performing programmed temperature heat treatment on the prepared polyamide acid nanofiber precursors loaded with metal ions in a protective atmosphere to prepare the porous carbon nanofiber electrocatalyst loaded with cobalt / lanthanum hydroxide heterojunction. The prepared porous carbon nanofiber electrocatalyst loaded with cobalt / lanthanum hydroxide heterojunction has excellent electrochemical oxygen reduction reaction and oxygen evolution reaction bifunctional catalytic activity.

This invention discloses a zirconium-lanthanum bulk co-doped high-nickel ternary material, its preparation method, and a battery. The zirconium-lanthanum bulk co-doped high-nickel ternary material is a ternary cathode material with bulk co-doped zirconium and lanthanum; the chemical formula of the ternary cathode material is LiNi. x Co y Mn (1‑x‑y) O2, wherein 0.8≤x≤0.9, 0≤y≤0.1; the total molar amount of zirconium and lanthanum is 1%~5% of the total molar amount of nickel, cobalt and manganese. The zirconium-lanthanum bulk co-doped high-nickel ternary material provided by the present invention enhances the mechanical strength of the ternary material through the bulk co-doping of zirconium and lanthanum, suppresses cracking and pulverization of the ternary material during charge and discharge, and improves cycle stability; at the same time, the two elements Zr and La synergistically stabilize the lattice, reduce lithium-nickel mixing, suppress irreversible phase transformation and lattice oxygen precipitation, achieve dual stability of bulk phase and interface, and improve the consistency and stability of the zirconium-lanthanum bulk co-doped high-nickel ternary material.

This invention provides a MoS2 / MoP@Ti3C2T x The research on heterostructured composite materials and their application in lithium-sulfur battery separators relates to the field of electrochemical energy storage materials and devices. The aforementioned composite material is constructed using an electrostatic self-assembly strategy, enabling MoS₂ / MoP heterostructure nanoparticles to be uniformly anchored on a monolayer of Ti₃C₂T. x Fabricated on the surface of nanosheets, this structure effectively inhibits the aggregation and stacking of components, maximizing the exposure of active interfaces. Among them, the highly conductive Ti₃C₂T... x The network ensures rapid electron transport, while the MoS₂ / MoP heterojunction provides strong chemisorption and efficient bidirectional electrocatalytic conversion of lithium polysulfides. Coating the aforementioned composite material onto a polypropylene separator as a modification layer significantly improves the overall performance of lithium-sulfur batteries, resulting in excellent rate performance and long-term cycle stability.

The application belongs to the technical field of lithium ion batteries, and discloses a carbon-compatible binder for a silicon-carbon negative electrode of a lithium ion battery, a preparation method and application thereof, wherein the carbon-compatible binder is abbreviated as CMC-Py, sodium carboxymethyl cellulose is dissolved in a phosphate buffer solution, then N-hydroxysuccinimide and 1-ethyl-(3-dimethylaminopropyl) carbodiimide are added to activate the carboxyl group of the sodium carboxymethyl cellulose, finally, 1-pyrenemethylamine hydrochloride is added, and the reaction is carried out under stirring and N2 at room temperature to obtain the binder. The binder is prepared by the amidation reaction of sodium carboxymethyl cellulose as a main chain and 1-pyrenemethylamine hydrochloride, the pyrene group introduced can form a pi-pi conjugated system with graphite in the silicon-carbon material, the interface compatibility of the binder and the silicon-carbon material can be effectively improved, the dispersibility and the adhesion of the silicon-carbon material can be enhanced, and the electrochemical performance of the silicon-carbon negative electrode of the lithium ion battery is significantly improved.

The application provides a high-capacity and high-rate hard carbon negative electrode material and a preparation method and application thereof, and belongs to the technical field of sodium ion battery negative electrode materials. Specifically, biomass shell raw materials are coarsely broken and sieved to obtain biomass coarse powder; the biomass coarse powder is mixed with an oxidizing agent and then pre-oxidized; mechanical pulverization is performed to obtain biomass coarse powder with a D50 of 8-15 microns; the biomass coarse powder is added into mixed acid and heated in a water bath, and then washed with water until neutral to obtain a purified precursor; and finally, the precursor is subjected to staged high-temperature carbonization in a vacuum carbonization furnace. Through specific process parameters, the prepared hard carbon material has a hierarchical porous structure and a suitable graphite microcrystalline layer spacing, and has a low total content of metal impurities; when applied to a sodium ion battery negative electrode, the hard carbon material exhibits a high reversible specific capacity, a high initial coulombic efficiency, and excellent long cycle stability and rate performance.

The invention discloses an oxygen reduction electrocatalyst and a preparation method and application thereof, and relates to the field of catalysis. The oxygen reduction electrocatalyst comprises a carrier and a metal monatomic loaded on the carrier, the carrier is nitrogen-sulfur double-doped porous carbon, the coordination structure of the metal monatomic and the nitrogen-sulfur double-doped porous carbon is N3S1M1, and M is a metal element corresponding to the metal monatomic. The oxygen reduction electrocatalyst provided by the invention does not contain noble metal, is relatively low in cost, is a monatomic catalyst in nature, and has extremely high atom utilization rate. The oxygen reduction electrocatalyst has a relatively large specific surface area, shows excellent oxygen reduction catalytic activity in an alkaline medium, and shows excellent long cycle stability in a water system and a flexible zinc air battery positive electrode, so that the oxygen reduction electrocatalyst has great application potential.

The application discloses an asymmetric hybrid mesoporous material and a preparation method and application thereof, and belongs to the technical field of mesoporous materials; the preparation method comprises the following steps: taking a template agent, a pore expanding agent and an organic silicon source as the basis, combining SiO2 nanospheres and an organic silane capping agent to prepare superstructure silicon spheres; then, the superstructure silicon spheres are dispersed in an alcohol-water mixed solvent, dopamine hydrochloride is added, and in-situ polymerization is carried out under the action of ammonia water to obtain an asymmetric mesoporous material. The material has a high specific surface area and a rich hierarchical pore structure, and the mesoporous superstructure silicon sphere constructed by the SiO2 nanospheres is one end, and the polydopamine layer is the other end. The application has the advantages of simple process and mild conditions, and the material morphology and size can be controlled by adjusting reaction parameters. When the material is applied to a water-based zinc ion battery negative electrode, the specific capacity, cycle stability and rate performance of the battery can be significantly improved, the zinc dendrite growth and side reactions can be effectively inhibited, and the material has important energy storage application value.

The application discloses the use of open-chain diimine compounds shown in formula (I) or formula (II) as electrolyte additives: R1-L1-N=C-Ph-C=N-L2-R2 (I) R1-L1-C=N-Ph-N=C-L2-R2 (II) wherein, L1, L2 are each independently selected from a single bond, substituted or unsubstituted C 1‑10 alkylene, substituted or unsubstituted phenylene; Ph is 1,4-phenylene or perfluoro-1,4-phenylene; R1, R2 are each independently selected from cyano, substituted or unsubstituted C 1‑10 alkyl, substituted or unsubstituted C 2‑10 alkyl, substituted or unsubstituted C 2‑10 alkyne, substituted or unsubstituted phenyl, significantly improves the long cycle stability of high-nickel ternary positive electrode materials, and solves the problem of rapid cycle capacity decay of the prior art electrolyte when matched with high-nickel positive electrodes at high voltage.

The application discloses a kind of sodium iron silicate negative materials and preparation method thereof.The method uses phosphating by-product silicon slag as silicon source, uses iron salt and sodium salt as raw material, uses template agent and solvent as auxiliary, and obtains the irregular spherical particle sodium iron silicate negative material by sol-gel method combined with stepwise heating calcination process.The application realizes high-value utilization of phosphating solid waste, and the prepared material has stable structure and exhibits high reversible capacity and excellent cycle stability when used as sodium-ion battery negative material.The method is simple, green and environmentally friendly, and low in cost, suitable for industrial production.

The application relates to the technical field of all-solid-state lithium batteries, and discloses an oxyfluoride active substance and a preparation method and application thereof, the preparation method steps are as follows: FeF3.3H2O and transition metal fluoride are mixed and ground, and then ball milling is carried out; the ball milling product is added into an organic solvent to carry out a solvothermal reaction, and after the reaction is completed, cooling and standing are carried out; the FeF3.3H2O is dispersed in the organic solvent, and after uniform stirring, the system after standing is dripped into, and then the solvothermal reaction is continuously carried out by heating; after the reaction is completed, the product is separated and dried to obtain the oxyfluoride active substance. The oxyfluoride active substance with a core-shell gradient structure is constructed through step-by-step high-energy ball milling and controlled heat treatment, the band gap and the crystal structure of the material are accurately controlled, and therefore a fluorine oxide-based composite positive electrode material with the advantages of structural stability, fast ion transmission kinetics, good interface compatibility, high specific capacity and good cycle stability is obtained.

The application discloses a composite nanofiber membrane, a modified nanofiber membrane and application thereof, and relates to the technical field of nanofiber membranes.The composite nanofiber membrane comprises a first electrolyte layer, a modified nanofiber membrane and a second electrolyte layer arranged in sequence.The first electrolyte layer comprises iron phthalocyanine, a first polymer and a first electrolyte lithium salt, and the second electrolyte layer comprises a second polymer and a second electrolyte lithium salt.The modified nanofiber membrane comprises modified nanofibers and a three-dimensional porous structure grown in situ on the modified nanofibers.The modified nanofibers contain ferrous iron, and the material of the three-dimensional porous structure contains iron phthalocyanine.The composite nanofiber membrane greatly improves the content of the electrolyte amorphous region, improves the dissociation of the electrolyte lithium salt, promotes the increase of ionic conductivity and ionic transference number, reduces the generation of side reactions, and is beneficial to realizing stable and long-acting interface performance.

This invention belongs to the field of electrode material technology, specifically relating to a multi-level nanostructure, dual-phase Co-Li4Ti5O 12 / TiO2 / C composite material, its preparation method, and its application. The composite material also contains the spinel phase Li4Ti5O. 12 The composite material is composed of anatase TiO2, doped with Co, and coated with a carbon layer. The preparation method of the composite material is as follows: Titanium, lithium, and cobalt sources are dissolved in anhydrous ethanol to obtain solution A; a carbon source is dissolved in water to obtain solution B; solution B is added dropwise to solution A; after the hydrothermal reaction is completed, the mixture is treated and calcined to obtain a multi-level nanostructured, two-phase interface composite material. The multi-level nanostructured, two-phase interface Co-Li4Ti5O2 composite material provided by this invention... 12 The preparation method of / TiO2 / C composite material is simple and low-cost. Applying the composite material to lithium-ion batteries can improve the chemical performance of the batteries and extend their lifespan.

This invention discloses a P2-type NaCrFeTi layered oxide, which is obtained by high-temperature solid-state sintering using sodium carbonate, iron oxide, chromium oxide, and titanium dioxide as raw materials. 0.67 Cr 1 / 3 Fe 1 / 3 Ti 1 / 3O2 layered oxide NCFT-33 / 33; belonging to the P2 phase structure of the P63 / mmc space group; microstructure is a hexagonal prism structure with a particle size of 1-3 micrometers, exhibiting a single-crystal structure; the main phase content reaches over 95%. Its preparation method is a one-step sintering method, where raw materials are ball-milled and mixed according to the chemical formula ratio, followed by sintering and natural cooling. When used as a sodium-ion battery anode material, the reversible specific capacity is 60.00-80.00 mAh g. ‑1 When the number of cycles is 3000, the capacity retention rate is 91-93%, and the capacity loss rate per cycle is only 0.0023-0.0030%.

The application relates to the technical field of lithium ion batteries, in particular to a high-entropy high-nickel cobalt-free precursor, a high-entropy high-nickel cobalt-free single-crystal positive electrode material and a preparation method thereof and a lithium ion battery. The high-entropy high-nickel cobalt-free precursor comprises a core layer and a high-entropy doped shell layer coated on at least part of the surface of the core layer; the core layer comprises a first nickel-manganese hydroxide; the high-entropy doped shell layer comprises a high-entropy doped second nickel-manganese hydroxide; and the doped elements in the high-entropy doped second nickel-manganese hydroxide include titanium, magnesium, aluminum, zirconium and molybdenum. The high-entropy high-nickel cobalt-free precursor provided by the application is coated with a high-entropy doped shell layer containing titanium, magnesium, aluminum, zirconium and molybdenum on the surface of the core layer containing the first nickel-manganese hydroxide, which is beneficial to reducing the exposure degree of {010} active crystal faces in the precursor, promoting the preferred growth of the positive electrode material along the (003) plane, and further improving the electrochemical performance and cycle stability of the high-entropy high-nickel cobalt-free single-crystal positive electrode material.

This invention provides a fast-charging lithium-ion battery electrolyte and a lithium-ion battery, belonging to the field of lithium-ion batteries. The fast-charging lithium-ion battery electrolyte comprises lithium bis(trifluoromethanesulfonyl)imide, lithium hexafluorophosphate, a fluorinated ether, and a non-aqueous solvent; the content of lithium bis(trifluoromethanesulfonyl)imide in the fast-charging lithium-ion battery electrolyte is greater than the content of lithium hexafluorophosphate. LiTFSI in the dual-salt system has a high thermal decomposition temperature and is insensitive to moisture, which can dilute the auxiliary salt concentration, reduce HF generation caused by moisture, reduce electrode corrosion, and improve electrode stability; TFSI... ‑ Large size, high electron delocalization, and similarity to Li + Low binding energy is beneficial to Li + Rapid dissociation and desolvation improve the rate performance of titanium niobate; the co-salt enhances interfacial stability, which is beneficial for improving the long-cycle performance of the battery; fluorinated ethers improve electrolyte wettability, further enhancing the rate performance of the battery.

The application discloses a preparation method of a high-fluorine-containing crosslinked polyimide nanofiber membrane, and comprises the following steps: synthesizing a polyamide acid precursor solution by mixing hexafluoro aromatic diamine and aromatic dianhydride in a solvent, preparing the polyamide acid precursor solution into a spinning solution, preparing a polyamide acid nanofiber membrane by a high-pressure electrospinning method, drying the polyamide acid nanofiber membrane in a vacuum environment at 100-200 DEG C for 0.5-1 h, then increasing the temperature to 200-300 DEG C and heating for 2-4 h, and finally increasing the temperature to 300-350 DEG C under nitrogen to perform thermal amidation and thermal crosslinking, and the holding time is 1-2 h. The application further discloses a lithium ion battery separator, which is the high-fluorine-containing crosslinked polyimide nanofiber membrane prepared by the above method. The introduction of dihydroxy and chemical crosslinking solve the problem that too high fluorine group content makes the solubilization ability of the polyimide membrane to the electrolyte too strong, and realize the application of the high-fluorine-containing nanofiber membrane as a high-performance lithium ion battery separator.

This application relates to the field of cathode active material technology, and discloses a lithium iron manganese phosphate cathode active material, its preparation method, and its applications, overcoming the problem of poor long-cycle performance of lithium iron manganese phosphate batteries in the prior art. The lithium iron manganese phosphate cathode active material of this application includes lithium iron manganese phosphate and a carbon coating layer, wherein the general formula of the lithium iron manganese phosphate is LiFe. x Mn y M z PO4, where 0 < x < 1, 0 < y < 1, 0.001 ≤ z ≤ 0.1, and M includes at least five of Mg, Ca, V, Co, Ni, Cu, Zn, Al, Zr, Ce, Ti, Cr, Y, Nb, Zr, Mo, Ru, Cd, La, Sr, and W; the crystallinity of the lithium iron manganese phosphate cathode active material is ≥ 90%. The lithium iron manganese phosphate of this application exhibits both high rate performance and long cycle stability.

This invention belongs to the field of lithium-ion battery technology, and particularly relates to an electrolyte additive and its preparation method, an electrolyte, and a lithium-ion battery. It includes one or a mixture of two of difluorophosphate methanesulfonyl ethyl ester (DFP-MSE) and difluorophosphate hydroxyethyl ethyl sulfate (DFP-HE-DTD), wherein the electrolyte additive accounts for 1% to 2% of the total mass of the electrolyte. This application optimizes the proportion of the electrolyte additive in the electrolyte by preparing the additive, enabling the electrolyte to possess advantages such as low-temperature fluidity and high ionic conductivity, and to synergize with the positive electrode structure, ultimately improving the low-temperature cycle performance of the battery while balancing energy density and stability at both high and low temperatures.

This invention relates to the field of lithium-ion battery cathode material technology, specifically a high-performance lithium-rich manganese-based cathode material based on pretreated boron nitride, its preparation method, and its application. The preparation method includes: introducing hydroxyl and amino groups onto the surface of boron nitride nanosheets; preparing a composite precursor powder by mixing a nickel-cobalt-manganese hydroxide precursor, a lithium source, TiO2, a phosphorus source, and pretreated boron nitride; sequentially performing conventional pre-calcination, a first-segment Joule heat treatment, and a second-segment Joule heat treatment; performing a third-segment instantaneous Joule heat treatment, followed by quenching; by introducing a surface-functionalized high thermal conductivity boron nitride network into the bulk phase of the material, and combining a programmed sequential heat treatment of "pre-calcination-two-segment Joule heat treatment" with instantaneous surface melting and quenching, this method effectively solves the inherent thermal gradient problem of the Joule heating method, simultaneously achieving high bulk phase homogenization and surface stabilization, resulting in a product with excellent comprehensive electrochemical performance.

The application provides an alumina-carbon double-layer coated silicon composite material and a preparation method and application thereof, and relates to the technical field of lithium ion battery negative electrode materials.The application provides an alumina-carbon double-layer coated silicon composite material, which comprises nanosilicon, an amorphous carbon layer coated on the surface of the nanosilicon, and an alumina layer coated on the surface of the amorphous carbon layer.Through the double-layer coating of the carbon layer and the alumina layer, the problems of volume expansion of the silicon negative electrode, poor conductivity and instability of the SEI film are solved, the electrochemical reaction activity of the battery is increased, and the long cycle stability of the negative electrode material is significantly improved.The data of the embodiment show that the alumina-carbon double-layer coated silicon composite negative electrode material prepared by the application has a first circle discharge specific capacity of 2251.45 mAh / g at 0.1 C, and the reversible discharge specific capacity can reach 719.23 mAh / g after 1000 cycles at 0.5 C.

The application discloses a method for preparing a Prussian blue analog composite material by using a heat-induced in-situ transformation strategy. The method refines Prussian blue analog crystal grains by introducing a layered MXene and using a directional freezing method, and the morphology of the synthesized composite material MXene@PBA@NSC is that Prussian blue nanocubes with a size of about 70nm are embedded in nitrogen-sulfur doped porous carbon and layered MXene. The unique structure has remarkable advantages, wherein the nanoscale Prussian blue analog significantly shortens the transmission distance of potassium ions, promotes the fast reaction kinetics, and meanwhile, the solid carbon skeleton and MXene nanosheet improve the structural stability of the electrode, prevent the aggregation of active Prussian blue analog particles, and significantly improve the rate performance of the potassium ion battery. In addition, the MXene@PBA@NSC composite structure provides a rich active interface, strengthens the charge transfer, and improves the potassium storage capacity. Benefited from the advantages, the MXene@PBA@NSC negative electrode shows excellent rate characteristics and long cycle stability, and fully demonstrates the possibility as a negative electrode material of a potassium ion battery. The application provides an efficient synthesis route for the synthesis of the Prussian blue analog.

The application provides a method for preparing a high-disorder layered lithium cobaltate positive material by thermal ion exchange, the material and application thereof, and comprises the following steps: taking cobaltic tetroxide particles as a cobalt source, grinding and mixing the cobaltic tetroxide particles with sodium carbonate and nano-magnesium oxide, pre-burning at a lower temperature to complete carbonate decomposition and solid-phase diffusion, and then sintering at a medium-high temperature for a long time to obtain a layered sodium cobaltate precursor; then mixing the precursor with a lithium nitrate / lithium chloride molten salt system, carrying out a thermal ion exchange reaction at 200-320 DEG C, washing and desalting by using deionized water, and drying to obtain a layered lithium cobaltate powder with a high interlayer stacking disorder degree. The material has regular and uniform primary particles, and the particle size is mainly 1-10 microns; the material exhibits excellent cycle stability and rate performance in a voltage window of 3.0-4.6 V, improves the structural stability and kinetic performance under high-voltage working conditions, and is suitable for large-scale preparation.

The application discloses a high-entropy doped lithium battery high-nickel ternary positive electrode material and a preparation method and application thereof, and relates to the technical field of lithium battery materials. The application discloses a high-entropy doped lithium battery high-nickel ternary positive electrode material and a preparation method and application thereof, and relates to the technical field of lithium battery materials. The application adopts a high-entropy doping strategy, utilizes the synergistic effect of multiple elements in a crystal lattice, significantly improves the crystal structure stability and interface stability of the material, and effectively inhibits phase transition and micro-crack generation of the high-nickel material in a long cycle process. The capacity retention rate of the obtained positive electrode material can reach 80% after 300 cycles, and the discharge specific capacity can still reach 146 mAh / g under 8 C high rate, and the positive electrode material exhibits excellent cycle stability and rate performance.

The application relates to a silicon-based composite negative electrode material and an electrochemical device and an electronic device containing the same, and belongs to the technical field of electrochemical energy storage. The silicon-based composite negative electrode material comprises a core, a first coating layer located on at least part of the surface of the core, and a second coating layer located on at least part of the surface of the first coating layer; the core comprises at least one of silicon-carbon, silicon element and silicon oxide; the first coating layer comprises a polyphenol compound and metal ions; and the second coating layer comprises a cross-linked polymer with an electrochemically active functional group, wherein the electrochemically active functional group is a functional group capable of being decomposed and forming a pore structure under electrochemical reduction conditions. The silicon-based composite negative electrode material has long cycle stability and high initial efficiency.

The invention relates to the technical field of batteries, in particular to a composite solid electrolyte, a semi-solid electrolyte and a semi-solid battery. The composite solid electrolyte comprises a solid electrolyte and an acesulfamic acid compound, wherein the mass content of the acesulfamic acid compound in the composite solid electrolyte is not less than 0.5%. The composite solid electrolyte provided by the invention can improve the long cycle stability, high power performance and interface durability of the semi-solid battery.

The invention discloses a lithium ion battery metal defect MAX phase negative electrode material and a preparation method and application thereof, and belongs to the technical field of lithium ion battery materials. The self-propagating high-temperature solid-phase one-step method is combined, a large batch of double-transition metal materials are simply and efficiently prepared, the metal defect type MAX phase material is obtained through HF etching, compared with a traditional MAX phase material, metal vacancies are introduced into the etched metal defect type MAX phase material, more active sites are provided for ion intercalation / deintercalation, and the metal defect type MAX phase material can be used for preparing the MAX phase material. Meanwhile, the structural stability of the MAX phase material is also considered. Compared with the traditional MAX phase material, the material prepared by the invention shows excellent long cycle stability, and can effectively relieve the problem of volume expansion in the charge-discharge process, thereby prolonging the service life of the battery. The material can promote rapid transmission of electrons and lithium ions, and the overall performance of the battery is further improved.

The invention provides a rubber-based current collector and a preparation method and application thereof, and relates to the technical field of lithium battery current collectors. The rubber-based current collector comprises a rubber matrix and carbon nanotubes, the rubber matrix is selected from a rubber-plastic composite material, the rubber-plastic composite material is a graft copolymer of natural rubber and plastic, and the plastic is selected from polymethylacrylic acid or ester derivatives thereof; the rubber-based current collector prepared by compounding the rubber matrix and the carbon nanotubes has good interface adhesion and conductivity, the peel strength is greater than 2N / cm, the conductivity is greater than 9S / cm, and a lithium battery prepared from the rubber matrix has excellent long cycle stability under a high-rate condition, and the capacity retention ratio is greater than 90%.