1440results about "Electrolytes" patented technology

The invention belongs to the technical field of design and preparation of solid electrolyte materials, and particularly relates to a LiBH4-based composite solid electrolyte material and a preparation method thereof.The LiBH4-based composite solid electrolyte material is obtained by performing high-energy ball milling on a mixture of LiBH4 and one or two metal halides MX2 in a certain molar ratio in an argon atmosphere; m is Mg, Zn, Ni or Bi; x is F, Cl, Br or I. According to the LiBH4 composite solid electrolyte prepared by the preparation method disclosed by the invention, the ionic conductivity at room temperature is improved to 10 <-4 > S cm <-1 > or above, and the ion diffusion activation energy is only 0.16 eV; the process is simple, the preparation time is short, the repeatability is high, no pollution is caused to the environment, and the industrial production requirement is met, so that the all-solid-state lithium ion battery electrolyte is expected to realize commercialized application.

The invention discloses a preparation method of a solid-state polymer composite electrolyte material and application of the solid-state polymer composite electrolyte material in an all-solid-state battery, and relates to the technical field of all-solid-state lithium ion batteries, and the preparation method comprises the following steps: firstly synthesizing a skeleton filler, adding an acid solution, and then carrying out ultrasonic treatment, soaking, centrifuging and washing to obtain an acid-modified skeleton filler; dispersing the acid-modified skeleton filler in an organic solution, adding a lithium salt, stirring, centrifuging, and washing to obtain a lithiated skeleton filler; weighing an electrolyte salt, adding the electrolyte salt into the polymer precursor, adding the lithiated skeleton filler, uniformly mixing, and drying to obtain a dried product; and finally, rolling the dried product into a thin film to obtain the solid polymer composite electrolyte thin film. According to the preparation method of the solid polymer composite electrolyte material, the ionic conductivity and Li < + > transference number of a solid polymer composite electrolyte thin film prepared by inducing polymer precursor polymerization through cations and compounding the inorganic filler at normal temperature are superior to those of a commercial PP film and a poly N, N-dimethylacrylamide film.

The invention provides a halide composite solid electrolyte, a preparation method thereof, a positive plate and a battery. The solid electrolyte comprises a porous SiO2 skeleton and a halide solid electrolyte, the SiO2 skeleton has a continuous and intercommunicated pore channel structure, the halide solid electrolyte partially fills the pore channel structure of SiO2 through in-situ growth, and the halide solid electrolyte partially wraps the surface of the SiO2 skeleton through in-situ growth. The interface of the SiO2 skeleton and the halide solid electrolyte comprises a transition layer; the mass content of the SiO2 skeleton is 1-30wt%, and the specific surface area is 50-500m < 2 > / g. The SiO2 skeleton can effectively reduce the contact area between halide electrolyte in the pore channel and environmental moisture, and delay the diffusion and permeation of moisture into the material. The high-bond-energy Si-O bond and the transition layer further inhibit hydrolysis of the halide electrolyte. The halide electrolyte forms a continuous ion transmission path in a continuous pore channel of SiO2, so that high ionic conductivity is guaranteed.

A secondary battery and an electric apparatus including the secondary battery. The secondary battery includes a negative electrode plate. The negative electrode plate includes a negative electrode current collector and a negative electrode film layer disposed on at least one surface of the negative electrode current collector, where the negative electrode film layer includes an additive capable of undergoing a nucleophilic reaction with a cyclic carbonate compound.

An electrolyte, a sodium secondary battery and an electric device. The electrolyte comprises a first sodium salt and a first solvent, wherein the first sodium salt comprises sodium trifluoromethanesulfonate, and the first solvent has a structure as shown in formula I, with the mass ratio of the first sodium salt to the first solvent being 0.01-0.4. The electrolyte has a good low-temperature ionic conductivity, which is beneficial for improving the low-temperature cycling performance and low-temperature coulombic efficiency of the battery.

Described herein is a chalcogen-halide solid electrolyte material represented by the following chemical formula: LiAxEyGz, or NaAxEyGz. In embodiments, A denotes one or more elements selected from the group consisting of magnesium (Mg), calcium (Ca), strontium (Sr), barium (Ba), Lanthanum (La), cerium (Ce), samarium (Sm), and boron (B). In embodiments, E denotes one or more chalcogen elements. In embodiments, G denotes one or more halide elements. In embodiments, the following mathematical formula is satisfied: 0<x<10, 0<y<10, z=nx−2y+1, wherein n=3 when A denotes at least one element selected from the group consisting of La, Ce, Sm, and B, and n=2 when A denotes at least one element selected from the group consisting of Mg, Ca, Sr, and Ba. In embodiments, A is a single element selected from the group consisting of Mg, Ca, Sr, Ba, La, Ce, Sm, or B.

The application belongs to the technical field of sodium ion battery materials, and particularly relates to a preparation method of an organic PSF modified NZZSP electrolyte material and application research of the sodium ion battery. The preparation method of the NASICON type solid-state composite electrolyte material can include the following steps: preparing a doped modified NASICON electrolyte sheet through a high-temperature solid-phase synthesis method, and then constructing an organic PSF interface coating layer on the surface of the modified NASICON electrolyte sheet through an in-situ polymerization method. The organic PSF modified NZZSP electrolyte prepared in the application effectively improves the electrochemical performance of the sodium ion battery, wherein the in-situ polymerized organic PSF modification coating layer can effectively improve the electrolyte / electrode interface contact, and can form a stable and uniform electrolyte / electrode interlayer. 2+ Partially doped and substituted Zr 4+ The Si / P ratio and Zn Benefiting from the synergistic effect of the two, the prepared organic PSF modified NZZSP electrolyte exhibits excellent capacity retention rate and cycle stability in the sodium ion battery.

Provided in the present disclosure are a solid electrolyte, a preparation method therefor and a secondary battery. The solid electrolyte comprises an oxide solid electrolyte and a shell layer coating the surface of the oxide solid electrolyte, wherein the shell layer comprises a monomer polymer and an ionic liquid. The monomer polymer is obtained by copolymerizing a first polymeric monomer and a second polymeric monomer, wherein the first polymeric monomer comprises one or more of ethylene glycol monomethyl ether acrylic acid, ethylene glycol monomethyl ether methacrylate, ethylene glycol monoethyl ether methacrylate and ethylene glycol monopropyl ether methacrylate; and the second polymeric monomer comprises a fluoroacrylate. F doping is firstly selected to modify LATP in the present disclosure, thereby significantly improving the ionic conductivity of the LATP, and widening the electrochemical window thereof, which is beneficial to improving the hydrophobicity thereof. The inner structure selected in the present disclosure is an LATP material doped with F, which can form better attraction to a C-containing group in the coating layer and cations of the ionic liquid, thereby improving the coating effect of the outer layer.

The invention discloses an electrolyte additive, an electrolyte and a battery, the electrolyte additive comprises a first additive and a second additive, the first additive comprises a compound containing a silicon element and unsaturated alkyl, the second additive comprises a compound as shown in formula 1, X1, X2, X3 and X4 are respectively and independently selected from N or CH; r is selected from a group consisting of a 5-to 6-membered aryl group, a 5-to 6-membered aryl group substituted by R0, a 5-to 6-membered heteroaryl group, a 5-to 6-membered heteroaryl group substituted by R0, a C1-8 alkyl group, a C1-8 alkyl group substituted by R0, a C2-8 alkenyl group, a C2-8 alkenyl group substituted by R0, a C0-8 alkylsilyl group or a C0-8 alkylsilyl group substituted by R0; and R0 is selected from C1-6 alkyl, C1-6 alkoxy or halogen.

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

The invention discloses a fluorine ion stabilizer, a lithium carbon fluoride battery electrolyte and a lithium carbon fluoride battery, and belongs to the field of lithium batteries. The fluorine ion stabilizer is prepared from a 1-ethyl-3-methylimidazole cation compound and an alcohol compound; the alcohol compound is selected from at least one of ethylene glycol and polyethylene glycol; the molecular weight of the polyethylene glycol is 62 to 3000. The binding energy of the fluorine ion stabilizer and fluorine ions is low, a solvation product can be stabilized, the final discharge product of the Li / CFx battery is changed, and finally the purpose of reducing the heat produced in the discharge process of the battery is achieved.

A lithium-ion secondary battery containing: a positive electrode; a negative electrode; a separator between the positive electrode and the negative electrode; and an electrolyte, in which the negative electrode may contain silicon or a silicon compound, a binder, and a carbon nanotube, the binder may contain a compound having a structure in which a linear molecule penetrates a cyclic molecule, and the electrolyte may contain an electrolytic salt containing one or more elements selected from the group consisting of boron, carbon, nitrogen, oxygen, and sulfur.

The invention relates to a wide-temperature-range high-voltage electrolyte, a preparation method and application of a lithium metal battery, and relates to the technical field of lithium metal batteries. The electrolyte comprises a lithium salt, a solvent and an additive, the solvent is a nitrile-ester blending solvent formed by mixing nitrile and ester, the viscosity of the electrolyte can be reduced, the conductivity of the electrolyte can be improved, meanwhile, a solvation structure can be regulated and controlled through the low freezing point of the nitrile solvent, and a stable passive film can be constructed through the ester solvent, so that the stability of an electrolyte / electrode interface is improved; and meanwhile, the stability of the interface is further promoted by introducing the additive. The electrolyte provided by the invention can be applied to lithium metal battery electrolyte, improves the safety and the cycle life of the battery, and is expected to be applied to energy supplies of electronic equipment such as intelligent war and rescue equipment, combat weapons, aerospace, new energy automobiles, AI auxiliary diagnosis equipment and the like in a wide temperature range (-20 to 60 DEG C).

Provided are a battery cell, a battery device, and an electric device. The battery cell comprises a positive electrode sheet and an electrolyte; the positive electrode sheet comprises a positive electrode current collector and a positive electrode active layer located on at least one surface of the positive electrode current collector; the positive electrode active layer comprises a positive electrode active material; the positive electrode active material comprises a lithium-containing phosphate; the single-sided surface density of the positive electrode active layer ranges from 230 mg / 1540.25 mm2 to 400 mg / 1540.25 mm2; the electrolyte comprises a solvent and a lithium-containing electrolyte salt; the solvent comprises a chain carboxylic acid ester and ethylene carbonate; the lithium-containing electrolyte salt comprises one or more of lithium hexafluorophosphate and a fluorine-containing sulfonimide salt; the mass ratio of the lithium-containing electrolyte salt to the ethylene carbonate is 0.29-0.72; and the conductivity of the electrolyte ranges from 13 mS / cm to 20 mS / cm.

The invention provides a composite solid electrolyte based on a porous meta-aramid nanofiber membrane and a fluorinated metal organic framework. A preparation method of the composite solid electrolyte comprises the following steps: preparing a porous poly (m-phenylene isophthalamide) nanofiber membrane; the fluorinated metal organic framework is prepared through two-step heat treatment synthesis and fluorination modification; and finally, coating the nanofiber membrane with a polymer electrolyte matrix comprising a fluorinated metal organic framework, polyethylene oxide and lithium salt to prepare the composite solid electrolyte. Through the synergistic effect of the porous polyisophthaloyl metaphenylene diamine nanofiber membrane and the fluorinated metal organic framework, while the mechanical strength and dendritic crystal inhibition capability of the composite solid electrolyte are remarkably improved, lithium ion transmission is effectively promoted, and the interface impedance is reduced; the prepared composite solid electrolyte is suitable for preparing a solid lithium metal battery with high safety and high performance.

This battery (1000) is provided with a first electrode layer (100), a second electrode layer (200), and an electrolyte layer (300). The battery (1000) satisfies at least one configuration selected from the group consisting of the following (I) and (II). (I) At least one selected from the first electrode layer (100), the second electrode layer (200), and the electrolyte layer (300) contains at least one titanium-containing material selected from the group consisting of halogenated titanium oxide and titanium oxide. (II) The battery (1000) is further provided with a side surface layer, which is disposed on the side surface of at least one of the first electrode layer (100), the second electrode layer (200), and the electrolyte layer (300), and which contains at least one titanium-containing material selected from the group consisting of halogenated titanium oxide and titanium oxide.

A solid electrolyte contains Li, Mα, Mβ, Mγ, Cl, and O. Mα is at least one element selected from the group consisting of Zr and Hf, Mβ is at least one element selected from the group consisting of Ta and Nb, and Mγ is at least one element selected from the group consisting of Gd, Yb, Dy, Er, Ho, Eu, and Sc. This provides the solid electrolyte with high ionic conductivity and high stability.

The application provides a fluorinated ether solvent and an electrolyte applied to energy storage batteries, especially lithium metal batteries, and the fluorinated ether solvent has a structure shown in formula I. By introducing at least one fluorine atom at both ends of an ether molecular chain, the fluorinated ether molecule has excellent salt solubility, the introduction of the fluorine atom can effectively reduce the electron cloud density of ether oxygen to improve the oxidation stability of the ether molecule, and excellent cycle stability of the high-voltage lithium metal battery is achieved; meanwhile, the locally strong polar fluorinated end group can interact with the cation of the salt to improve the ionic conductivity of the electrolyte, and the rapid charge-discharge performance of the high-voltage lithium metal battery is improved.

A process for directly recycling Li-ion battery cathode materials involves hydrothermally treating cathode black mass (CBM) in an alkaline solution to decompose polyvinylidene fluoride (PVDF) and remove electrolyte salts; rinsing the treated CBM in deionized water to remove excess alkaline solution, conductive carbon, degraded PVDF, and impurities; and annealing the washed material to restore the crystalline structure and remove residual carbon.

A lithium-ion battery and a preparation method therefor. The lithium-ion battery comprises a positive electrode sheet, a separator and a negative electrode sheet, which are stacked in sequence, wherein the surface of the negative electrode sheet is provided with a solid electrolyte interface film, and the solid electrolyte interface film comprises a lithium oxide. The solid electrolyte interface film is subjected to a sputtering test by using an X-ray photoelectron spectrometer. Under at least one sputtering depth in the range of 30-70 nm, the atomic percentage of lithium is A, and the atomic percentage of oxygen is B, wherein A≥50%, and B≥20%; and the ratio of the atomic percentage of lithium to that of oxygen is greater than 1.5.

The invention discloses a PEO-based solid electrolyte capable of adsorbing polysulfide and a preparation method of the PEO-based solid electrolyte, and relates to the technical field of sulfur lithium batteries, the preparation method comprises the following steps: 1) preparing PEO solid electrolyte slurry; and 2) preparing the solid electrolyte film. The H-Beta molecular sieve added into the electrolyte can effectively destroy a PEO crystalline region, adsorb polysulfide and improve the ionic conductivity; the bacterial cellulose skeleton provides mechanical strength and inhibits growth of lithium dendrites. The ionic conductivity of the electrolyte reaches 2.37 * 10 <-4 > Scm <-1 > at the temperature of 60 DEG C, when the electrolyte is applied to a lithium-sulfur battery, the specific capacity of about 350 mAhg <-1 > can still be kept after 400 cycles at the rate of 1C, excellent cycle stability is shown, and the shuttle effect of polysulfide is effectively inhibited.

The application provides a solid electrolyte membrane and a preparation method thereof, a secondary battery and an electric device. The solid electrolyte membrane of the application comprises the following components: polyvinylidene fluoride or a copolymer thereof, polyimide or a copolymer thereof, an electrolyte salt, and an aminopolycarboxylate. The solid electrolyte membrane is prepared by taking polyvinylidene fluoride or a copolymer thereof as a matrix, and adding polyimide and an aminopolycarboxylate to improve the crystallization performance of polyvinylidene fluoride, so that a dense, high Young's modulus, flame-retardant composite polymer electrolyte membrane is obtained. The solid electrolyte membrane prepared by the application has a Young's modulus of ≥ 9.5 GPa at a thickness of 10 μm, an ionic conductivity of > 4*10 ‑4 S / cm at 25 ℃, and a capacity retention rate after 600 cycles at 1 C, all of which are above 85%.

The invention relates to an electrochemical sodium metal halide secondary cell (0) comprising a housing (1) and a current collector that is resistant to long-term mechanical and / or chemical stresses and alternating thermal loads, with a cavity (14) containing a reservoir for receiving the secondary electrolyte, as well as a battery module, system comprising the battery module, as well as an energy storage system and its use.

The electrolyte for a lithium-sulfur battery according to the present invention includes an organic solvent, a lithium salt, and an additive, the additive including tantalum pentafluoride (TaF5). By including tantalum pentafluoride in the electrolyte for a lithium-sulfur battery, the life characteristics of the lithium-sulfur battery can be improved.

The present invention relates to a negative electrode for an all-solid-state battery, an all-solid-state battery including same, and a method for manufacturing an all-solid-state battery. More specifically, the negative electrode for an all-solid-state battery includes a positive electrode layer, a negative electrode layer, and a solid electrolyte layer disposed between the positive electrode layer and the negative electrode layer, wherein the negative electrode layer includes a negative electrode current collector, a first coating layer on the negative electrode current collector, and a second coating layer on the first coating layer. The first coating layer includes a first carbon-based material, a first metal, and a first binder, and the second coating layer includes a second carbon-based material, a second metal, and a second binder. The first binder includes a rubber-based binder, while the second binder includes a non-rubber-based binder.

The present disclosure relates to an electrode assembly comprising: a positive electrode, a negative electrode, and a coating layer located between the positive electrode and the negative electrode, wherein the coating layer includes (a) oxide-based solid electrolyte particles, and (b) one or more selected from the group consisting of polymer particles and ceramic particles.

The invention relates to the field of solid electrolyte preparation, and discloses a preparation method of a solid electrolyte membrane, the solid electrolyte membrane, a pole piece and a battery, the preparation method of the solid electrolyte membrane comprises the following steps: S1, uniformly mixing solid electrolyte powder with a fiberized binder to obtain a mixture; s2, rolling the mixture to form a primary membrane with a preset thickness; and S3, carrying out transverse and longitudinal two-way stretching on the primary membrane at a first temperature to obtain the solid electrolyte membrane, wherein the binder comprises PVDF (Polyvinylidene Fluoride) and / or a copolymer of PVDF; and the thickness of the solid electrolyte membrane is not greater than 10 microns. According to the invention, the excellent film-forming property and mechanical strength of the binder system are utilized, so that the solid electrolyte membrane has better processability, the solid electrolyte membrane can be stretched to be less than 10 microns, the safety performance of the battery can be guaranteed, and the energy density of the battery can be considered.

This coated active material is provided with a positive electrode active material and a coating material that contains a first solid electrolyte and covers at least a part of the surface of the positive electrode active material. The first solid electrolyte contains Li, M, and X, where M is at least one element selected from the group consisting of metal elements other than Li and semimetal elements, and X is a halogen element. MC180 is defined as the value obtained by dividing the cumulative value of the amount of water released from the coated active material when the coated active material is heated from 120 DEG C to 180 DEG C by the total mass of the coated active material. At the moment, the moisture content MC180 is 0 ppmlt; mC180 is less than or equal to 600ppm.

This application provides a secondary battery and a power consumption device. The secondary battery of this application comprises a negative electrode sheet and a non-aqueous electrolyte, the negative electrode sheet comprising a negative electrode active material having a volume average particle size Dv50 of 6 to 20 μm, the non-aqueous electrolyte comprising an additive and a non-aqueous solvent, the additive comprising a cyclic sulfate ester compound represented by formula (I), and the non-aqueous solvent comprising ethylene carbonate. Thus, this application forms a non-aqueous electrolyte using an ethylene carbonate solvent and an additive and combines it with a negative electrode active material of a certain particle size. JPEG2026518375000042.jpg4569

Lithium secondary battery, comprehensive a positive electrode, a negative electrode, a separator and a non-aqueous electrolyte, wherein: the positive electrode comprises a positive electrode active material, wherein the positive electrode active material comprises lithium iron phosphate particles and the positive electrode has a loading amount of 450 mg / 25 cm² 2 up to 740 mg / 25 cm 2 exhibits; and the non-aqueous electrolyte comprises a lithium salt, an organic solvent and an additive, wherein the organic solvent comprises a solvent based on a cyclic carbonate and a solvent based on a linear carbonate, wherein the solvent based on a cyclic carbonate comprises ethylene carbonate and the solvent based on a linear carbonate comprises dimethyl carbonate, the additive comprises vinylene carbonate and the dimethyl carbonate is present in an amount of 5 vol% to 75 vol% in the organic solvent and the weight ratio of vinylene carbonate to dimethyl carbonate is greater than 0 to 0.2 or less.