36 results about "Lithium electrolyte" patented technology

The present invention discloses a delocalized lithium electrolyte that breaks through the limitations of traditional dominant solvent structures, as well as its preparation method and application. The delocalized electrolyte delocalizes its microscopic solvent structure by combining lithium salts and solvents with differentiated physicochemical properties, thereby forming a diversified solvent structure. The delocalized solvent structure not only enriches the microstructure of the electrolyte, but also significantly improves the overall electrolyte performance through performance complementarity, thereby effectively improving the charge and discharge efficiency and cycle life of the lithium battery. The use of this electrolyte can achieve lithium secondary batteries with a capacity of more than 600Wh / kg, which has significant engineering application value.

A lithium sulphur battery comprising a Li anode, a separator between the anode and cathode, a Li-containing electrolyte; and a sulphur-containing cathode; wherein the separator comprises a porous substrate carrying a metal-organic framework comprising at least two different metal ions one of which is an iron ion. Also, a process for the preparation of a cathode material for a Li—S battery comprising nucleating metal ions on a graphene oxide or reduced graphene oxide sheet such that the metal ions are chemically bound to the basal plane of the graphene oxide or reduced graphene oxide sheet; growing a metal-organic framework comprising said chemically bound metal ions by adding a polyfunctional ligand to form a metal organic framework bound to a reduced graphene oxide sheet (MOF@rGO); and infusing elemental sulphur into the metal organic framework to form S-MOF@rGO.

A secondary battery and an electronic apparatus. Specifically, the secondary battery comprises: a positive electrode, a negative electrode, and an electrolyte; the positive electrode comprises a positive electrode current collector and a positive electrode material provided on the positive electrode current collector; the positive electrode material comprises lithium cobalt oxide; the electrolyte comprises methylene methane disulfonate and propenyl-1,3-sultone; relative to 100 parts by mass of the electrolyte, the sum of methylene methane disulfonate and propenyl-1,3-sultone is 0.02 parts by mass to 3.5 parts by mass. The overcurrent and over-temperature safety of the secondary battery are improved.

According to the lithium supplement negative plate and the preparation method thereof, the lithium supplement amount required by negative electrode lithium supplement is calculated, and lithium is loaded through a substrate film, so that a lithium supplement composite belt with accurate lithium layer thickness for lithium supplement and high mechanical strength is prepared. The lithium composite belt is used for supplementing lithium to the negative electrode, so that accurate and uniform lithium supplementation of the negative electrode of the lithium ion battery can be realized. In addition, a main solvent of the lithium supplementing electrolyte is a low-boiling-point solvent with the boiling point smaller than 76 DEG C and larger than 20 DEG C, phase change heat absorption in the lithium supplementing process is achieved, and the ionic conductivity is reduced after local gasification; the electrolyte contains the lithium salt, and the lithium supplementing rate is controlled through the concentration of the lithium salt, so that the problem that the side reaction is aggravated due to high heating and high temperature rise during lithium supplementing of metal lithium is effectively avoided, and meanwhile, the electrolyte contains the interface film-forming additive, so that the stability of a negative electrode interface is promoted.

A novel lithium electrolyte sampler comprises a storage rack, the storage rack is arranged on a base, a high tray and a low tray are arranged on the left side and the right side of the storage rack, a stock solution tank is placed on the high tray, a sampling bottle is placed on the low tray, a U-shaped pipe is further arranged on the storage rack in an inverted mode, one end of the U-shaped pipe is inserted into the stock solution tank, and the other end of the U-shaped pipe is inserted into the sampling bottle. The other end of the U-shaped pipe is inserted into the sampling bottle, a ball valve is arranged on the right side of the upper end of the U-shaped pipe, an air blowing port is formed in the left side of the ball valve, the siphon principle is applied, the lithium electrolyte which is not in contact with air is obtained from the sampling bottle, the advantage that a sampled sample meets the test standard is achieved, and the technical problem that the sampled lithium electrolyte is not in contact with the air is solved.

A battery. The battery comprises a positive electrode sheet and an electrolyte; the positive electrode sheet comprises lithium iron phosphate; the electrolyte comprises vinylene carbonate and a silicon-based fluorophosphate compound represented by formula I: formula I; in formula I, R1, R2 and R3 are each independently selected from any one of H, F, C1-C4 alkyl, C1-C4 fluoroalkyl, C2-C4 alkenyl, C2-C4 fluoroalkenyl, C2-C4 alkynyl, C2-C4 fluoroalkynyl, C5-C7 cycloalkyl, R4 substituted phenyl, and R5 substituted benzyl, and R4 and R5 are each independently selected from any one of C1-C4 alkyl, C2-C4 alkenyl, C2-C4 alkynyl, C1-C4 fluoroalkyl, C2-C4 fluoroalkenyl, C2-C4 fluoroalkynyl, and F.

In accordance with the purpose(s) of the present disclosure, as embodied and broadly described herein, the disclosure, in one aspect, relates to the efficient and rapid synthesis of high-performance sodium ion electrolytes. The electrolytes have the general formula Nau+yNw-yMyLazCl3-vXv. The electrolytes possess superionic conductivity and display a low electronic conductivity, which ensures negligible electron transport contribution to the measured total conductivity and thereby enhancing safety when applied in energy storage devices. The synthesis of the electrolytes is significantly faster when compared to the synthesis of lithium electrolytes and the process can be scalable to produce large amounts of electrolytes.

The invention relates to a secondary battery and an electronic device. Specifically, the secondary battery provided by the invention comprises a positive electrode, a negative electrode and an electrolyte, the positive electrode comprises a positive electrode current collector, and an insulating layer and a positive electrode material layer which are arranged on the positive electrode current collector; the insulating layer comprises boehmite, the positive electrode material layer comprises lithium iron phosphate and lithium manganate, and the electrolyte comprises lithium difluorophosphate. According to the invention, the floating charging safety of the secondary battery can be improved, and the particle breaking change rate can be reduced.

The invention provides a formation process of a battery, the battery comprises an electrolyte, and the electrolyte comprises a first additive and a second additive; the first additive comprises fluorine-containing lithium electrolyte salt and / or sulfur-containing unsaturated ester; the second additive comprises one or more of a fluorine-containing compound, an unsaturated compound, a boron-containing compound, a sulfur-containing compound or a phosphorus-containing compound; the formation process comprises the step of carrying out constant-voltage charging at the charging voltage of 2.5 V to 4.1 V. The low-temperature discharge performance, the rate capability, the high-temperature storage performance and the like of the battery can be improved at the same time.

In accordance with the purpose(s) of the present disclosure, as embodied and broadly described herein, the disclosure, in one aspect, relates to the efficient and rapid synthesis of high-performance sodium ion electrolytes. The electrolytes have the general formula Nau+yNw−yMyLazCl3−vXv. The electrolytes possess superionic conductivity and display a low electronic conductivity, which ensures negligible electron transport contribution to the measured total conductivity and thereby enhancing safety when applied in energy storage devices. The synthesis of the electrolytes is significantly faster when compared to the synthesis of lithium electrolytes and the process can be scalable to produce large amounts of electrolytes.

The utility model relates to the technical field of lithium electrolysis automatic lithium collection structures, in particular to a lithium electrolysis automatic lithium collection structure which comprises an electrolytic tank, the electrolytic tank is used for containing lithium electrolyte, two sliding rails are arranged on one side of the electrolytic tank, the upper ends of the sliding rails are slidably connected with a lithium collection frame plate, two electric telescopic rods are fixedly installed on one side of the electrolytic tank, and the two electric telescopic rods are fixedly connected with the lithium collection frame plate. A groove is formed in one side of the electric telescopic rod, a spring is fixedly installed in the groove, a guide column is fixedly installed on one side of the spring, a scraping plate is fixedly installed on one side of the guide column, a controller is fixedly installed at the front end of the electrolytic tank, and positive plates are arranged on the two sides of the electrolytic tank; a guide plate is fixedly mounted at the rear end of the electrolytic tank, a T-shaped groove is formed in the upper end of the guide plate, and an electric telescopic plate is arranged above the guide plate; according to the automatic lithium collection structure for lithium electrolysis, automatic lithium collection is realized, and the efficiency is high.

The invention provides a carbon-based coated composite copper oxide flexible electrode material and a preparation method and application thereof. The copper oxide and cuprous oxide composite material is prepared in situ through thermal oxidation of foamy copper, and then the surface of the copper-based material is coated with the self-polymerized carbon-based material. The electrode material, a ternary all-lithium electrolyte and a lithium-silicon alloy negative electrode form a single thermal battery, the open-circuit voltage of the single thermal battery is 2.5 V-2. 8V, the open-circuit voltage of the single thermal battery is 2.1 V-2. 3V, no obvious voltage peak exists, the discharge voltage is stable, the discharge duration is longer than 80min when the cut-off voltage is 1.4 V under the conditions of 500 DEG C and 50mA constant-current discharge, and the single thermal battery is suitable for a long-life thermal battery. The conductivity of copper oxide is improved through carbon-based material coating, and the flexible electrode is not prone to fragmentation and suitable for being applied to a high-voltage long-service-life thermal battery in an extreme environment.

The invention discloses a fractal porous silicon-based additive for a lithium iron phosphate electrolyte, and belongs to the technical field of battery electrolyte additives. The additive solves the problems of low ion transmission efficiency and high interface impedance caused by lack of mathematical model guidance in structural design and difficulty in consideration of electrolyte storage, rapid and selective transmission of a traditional single or two-stage pore structure. An inorganic oxide skeleton is adopted to construct a three-dimensional fractal hierarchical porous structure with a three-level pore (90-110 nm, 8-12 nm and 2-4 nm) network, the pore diameter ratio is about (90-110): (8-12): (2-4), the fractal dimension is 2.3-2.5, the porosity is 0.45-0.65, and the specific surface area is 350-450 m / g. The surface of the catalyst is subjected to hierarchical selective modification, first-stage and second-stage pore channels are rich in anion selective groups, third-stage pore channels are rich in cation selective groups, and the selectivity ratio of # imgabs0 reaches 1.6-1.8. A three-stage construction strategy of coordination of a hard template, a soft template and a molecular template is adopted, and structural regulation and control are realized through step-by-step calcination and graded modification. The method is applied to the lithium iron phosphate electrolyte.

Disclosed herein is a battery (e.g., a Li-S battery), comprising: an anode; a cathode comprising sulfur; a Li-containing electrolyte; and a separator between the anode and the cathode, wherein the cathode is coupled to or coated with nanoparticles having a composition according to Formula (I), and / or the separator is coated with nanoparticles having a composition according to Formula (I): Bi x Gd 1-x Fe y Ni 1-y O 3 , wherein 0.50 ≤ x < 1.00 and 0.50 ≤ y < 1.00. Batteries according to the present disclosure show enhanced specific capacity and capacity retention.

The present application relates to the field of lithium ion batteries, and provides a lithium supplement electrolyte, a lithium supplement electrode and a lithium ion battery, all of which comprise a lithium supplement additive; the oxidation of the lithium supplement additive nitrite in the charging process can make lithium ions in the battery insert into the negative electrode, supplement the lithium ions lost in the lithium ion battery due to the formation of a solid electrolyte interface film, and improve the cycle life and capacity of the battery; in addition, the nitrate produced by the decomposition of the nitrite can improve the structure of the solid electrolyte interface film generated subsequently, which is beneficial to improve the cycle life and stability of the battery; in addition, the nitrite of the present application can be produced on a large scale and is cheap, and therefore can be applied to industrial production. Compared with the prior art, the present application has the advantages of improving the cycle life and capacity of the battery and being applicable to industrial production.

The invention belongs to the related technical field of batteries, and discloses a high-concentration electrolyte as well as a preparation method and application thereof. The electrolyte comprises an organic solvent, a lithium salt and a non-lithium electrolyte salt, wherein the cation deposition potential of the non-lithium electrolyte salt is lower than the lithium ion deposition potential; and in the electrolyte, the concentration of the lithium salt is 0.1-1 mol / L, and the concentration of the non-lithium electrolyte salt is 1-6 mol / L. Based on a design strategy of a high-concentration electrolyte of mixed non-lithium metal cations of a potential difference-driven selective ion stabilization mechanism, under the condition of maintaining a low lithium salt concentration, the high-concentration electrolyte of the mixed non-lithium metal cations is obtained; positions of other non-lithium electrolyte salts which are low in cost and rich in resources and have deposition potentials lower than Li < + >-negative electrode reaction potentials are used for replacing part of Li < + > in the high-concentration electrolyte, so that the unique solvation structure advantage of the high-concentration electrolyte is reserved, and meanwhile, side reactions caused by introduction of heterogeneous cations are avoided; therefore, cost optimization and further improvement of battery performance are realized.

The invention belongs to the technical field of battery materials, and discloses an ultrathin and high-strength diaphragm as well as a preparation method and application thereof. The diaphragm comprises a base layer and a supporting layer, the supporting layer comprises a high polymer material or inorganic ceramic nanofiber, a surfactant and an antistatic agent; the base layer comprises inorganic nano ceramic particles and polyvinylidene fluoride; the inorganic nano ceramic particles are selected from at least one of an oxygen-containing substance of aluminum, an oxygen-containing substance of magnesium, an oxygen-containing substance of silicon, an oxygen-containing substance of titanium and a lithium electrolyte. The composition of the supporting layer and the slurry layer is specifically selected, so that the thickness of the diaphragm prepared by the invention is less than 1.5 mu m, further less than 1 mu m and even less than 0.6 mu m, and the tensile strength of the diaphragm is greater than 5.5 MPa.

The application relates to a preparation method of a high-dielectric-constant fiber-reinforced solid-state electrolyte, and relates to a preparation method of a solid-state electrolyte. The method comprises the following steps: S1, preparing barium strontium titanate nanofibers; and S2, preparing a fiber-reinforced solid-state electrolyte. The barium strontium titanate nanofiber skeleton is prepared by an electrostatic spinning method, and is used for constructing a quasi-solid-state electrolyte; the barium strontium titanate nanofiber skeleton has a self-supporting stable structure and a high specific surface area, significantly increases the contact area between BST and poly(vinylidene fluoride-co-hexafluoropropylene) / bifluorosulfonylimide lithium electrolyte, avoids particle aggregation, and significantly improves the electrochemical performance of the electrolyte. In particular, BST has special electrical properties as a ferroelectric body, helps to improve the interface stability in a battery, reduces the interface impedance, further improves the migration rate of lithium ions in the electrolyte, has excellent electrochemical performance, and can meet the future requirements of high energy density and safety.

The embodiments of the present disclosure relate to a method and compounds for capturing and releasing carbon dioxide. The method comprises heating, and / or pressurizing, or electrolyzing a carbon capture compound that comprises beryllium in order to reduce a carbon dioxide content of a carbon dioxide containing gas.

This invention relates to the field of polyether-based lithium-ion battery electrolytes; it provides a polyether-based lithium-ion battery electrolyte and its preparation method; the invention uses polyethylene oxide and lithium bis(fluorosulfonyl)imide as the main components, combined with dynamic polyether prepolymer and polyether-shelled alumina nanoparticles, controlling the imine bond conversion rate, median particle size D50, organic shell content, and the molar ratio of lithium salt to ethylene oxide units; through anhydrous acetonitrile system slurry preparation, casting, segmented drying, and post-curing, a film-like or coating-like electrolyte is obtained, with a water content not exceeding 500 mg / kg, a total residual organic solvent content not exceeding 1000 mg / kg, and controllable viscosity and thickness, while promoting a reduction in residual epoxy value; it solves the problem of difficulty in balancing viscosity and purity in casting film formation; and is suitable for the large-scale preparation of lithium-ion battery electrolyte membranes.

A lithium-ion battery, and an electric device using the same. The lithium-ion battery comprises a positive electrode, a negative electrode and an electrolyte, wherein an active material of the positive electrode comprises lithium iron manganese phosphate, and the electrolyte comprises a thiophene additive. The chemical structure of the thiophene additive satisfies formula I, wherein at least one group of R1-R4 comprises at least one of an amino, a thienyl, a pyridyl, an acetyl, an amido and an ester group; and the content of the thiophene additive is 0.08-2.80wt% on the basis of the total mass of the electrolyte.

The invention provides a secondary battery and electric equipment. The secondary battery comprises a positive pole piece and an electrolyte, the positive pole piece comprises a positive current collector and a positive active material layer arranged on at least one surface of the positive current collector, the positive active material layer comprises a positive active material, the positive active material comprises lithium iron phosphate, and the lithium iron phosphate comprises secondary particles formed by gathering primary particles. The average particle size of the primary particles is D nm, the specific surface area of the lithium iron phosphate is BET m < 2 > / g, and D / BET is greater than or equal to 2 and less than or equal to 30; the electrolyte comprises an additive and an organic solvent, the additive comprises lithium fluorosulfonate, the mass percentage of the lithium fluorosulfonate in the electrolyte is a%, 0.05 < = a < = 0.5, the organic solvent comprises ethyl propionate, and the mass percentage of the ethyl propionate in the organic solvent is greater than or equal to 30%. The low-temperature discharge performance, the high-temperature storage performance and the high-temperature cycle performance of the secondary battery are improved by matching the proper positive electrode active material and the electrolyte.

In accordance with the purpose(s) of the present disclosure, as embodied and broadly described herein, the disclosure, in one aspect, relates to the efficient and rapid synthesis of high-performance sodium ion electrolytes. The electrolytes have the general formula Nau+yNw−yMyLazCl3−vXv. The electrolytes possess superionic conductivity and display a low electronic conductivity, which ensures negligible electron transport contribution to the measured total conductivity and thereby enhancing safety when applied in energy storage devices. The synthesis of the electrolytes is significantly faster when compared to the synthesis of lithium electrolytes and the process can be scalable to produce large amounts of electrolytes.

The invention discloses a composite lithium-supplementing electrolyte, a battery cell, a single battery and electric equipment. The composite lithium-supplementing electrolyte is prepared by mixing a lithium-supplementing agent and an electrolyte. Wherein the lithium supplement agent soluble in the electrolyte is used for providing an extra lithium source to make up lithium consumption in the battery circulation process, the electrolyte is used for solving the problem of electrolyte consumption in the battery after long circulation, and meanwhile, the lithium supplement agent can be uniformly dispersed to make lithium supplement integrally and uniformly.

The invention provides an electrolyte based on hollow mesoporous silica microspheres and a preparation method thereof. The preparation method of the electrolyte based on the hollow mesoporous silica microspheres comprises the following steps: immersing the hollow mesoporous silica microspheres with a lithium electrolyte. The electrolyte provided by the invention takes the hollow mesoporous silica microspheres as a coating material, and the lithium electrolyte is coated in the hollow mesoporous silica microspheres, so that the risk of battery short circuit spontaneous combustion caused by diaphragm puncture due to lithium dendrite growth is effectively solved; meanwhile, the electrolyte provided by the invention has better capacity retention capability in long-acting circulation.

The invention relates to the field of electrolyte recovery, in particular to a lithium iron phosphate electrolyte recovery device and method.The lithium iron phosphate electrolyte recovery device comprises a pyrolysis box, the pyrolysis box is provided with a conveying and separating assembly for lithium iron phosphate battery broken materials, and a feeding assembly for gradually feeding is fixedly installed on the pyrolysis box; liquid materials in materials conveyed by the conveying and separating assembly can be pyrolyzed and evaporated through the nitrogen heating assembly, an inclined plane cleaning block and an exhaust box are fixedly installed on the inner wall of the pyrolysis box, and air holes are evenly formed in the inclined plane of the inclined plane cleaning block and the bottom of the exhaust box correspondingly. The nitrogen heating assembly enables the inclined surface cleaning block and the exhaust box to exhaust gas, so that the conveying and separating work of the conveying and separating assembly is guaranteed; when the solid-liquid separation device is used, solid materials and liquid materials are evenly mixed through the feeding assembly, the solid materials are scattered so as to be conveniently filtered, the materials can be gradually discharged to the conveying belt through the feeding assembly, and solid-liquid separation is facilitated.

A secondary battery and an electronic device. By adjusting the components of a positive electrode and an electrolyte in the secondary battery, the discharge performance is improved. The secondary battery comprises a positive electrode, a negative electrode, and an electrolyte; the positive electrode comprises a positive electrode current collector, and a titanium dioxide material layer and a positive electrode material layer which are disposed on the positive electrode current collector; the positive electrode material layer comprises lithium iron phosphate and lithium manganese oxide, and the electrolyte comprises ethylene glycol bis(propionitrile)ether; the lithium iron phosphate is doped with a boron element, and the lithium manganese oxide is doped with a copper element and a tin element.

A secondary battery and an electronic apparatus. The secondary battery comprises: a positive electrode, a negative electrode, and an electrolyte, wherein the positive electrode comprises a positive electrode current collector, and an insulating layer and a positive electrode material layer which are provided on the positive electrode current collector; and the insulating layer comprises boehmite, the positive electrode material layer comprises lithium iron phosphate and lithium manganate, and the electrolyte comprises lithium difluorophosphate. The present application not only improves the floating charge safety of secondary batteries, but also reduces the rate of particle fragmentation.

In accordance with the purpose(s) of the present disclosure, as embodied and broadly described herein, the disclosure, in one aspect, relates to the efficient and rapid synthesis of high-performance sodium ion electrolytes. The electrolytes have the general formula Nau+yNw−yMyLazCl3−vXv. The electrolytes possess superionic conductivity and display a low electronic conductivity, which ensures negligible electron transport contribution to the measured total conductivity and thereby enhancing safety when applied in energy storage devices. The synthesis of the electrolytes is significantly faster when compared to the synthesis of lithium electrolytes and the process can be scalable to produce large amounts of electrolytes.

The invention discloses a method for recovering lithium from electrolytic aluminum waste residues, which comprises the following steps: finely grinding the electrolytic aluminum waste residues containing lithium fluoride into powder, heating, centrifugally separating to obtain a high-lithium electrolyte solution and a low-lithium electrolyte solution, infiltrating the high-lithium electrolyte solution by using a calcium chloride solution, and carrying out liquid-solid separation on calcium fluoride precipitate; adding ammonium bicarbonate into the leaching mother liquor, and carrying out liquid-solid separation on calcium carbonate precipitates; adding sodium oxalate into the ammonium bicarbonate conversion mother liquor to carry out secondary calcium removal, and carrying out liquid-solid separation on calcium oxalate precipitates; adding sodium carbonate into the calcium precipitation mother liquor, carbonizing and precipitating lithium, performing liquid-solid separation to obtain lithium carbonate precipitate, and drying to obtain battery-grade lithium carbonate. According to the method, the lithium extraction efficiency is high, the cost is low, the purity of the obtained lithium carbonate meets the battery grade requirement, meanwhile, the generated by-product can be used as an industrial raw material, the lithium precipitation mother liquor can achieve zero waste liquid discharge through the double decomposition process, and finally reduction and high-value utilization of the electrolytic aluminum waste residues are achieved.