5001results about "Organic electrolytes" patented technology

A separator for an electrochemical cell having a porous layer with a blend of a first type of boehmite particles and a second type of boehmite particles and an organic polymer binder, where the first type of boehmite particles is different from the second type of boehmite particles with respect to crystallite particle size and / or composition, and the blend ranges from about 50%-50% by weight of the first and second types of boehmite particles to about 60%-40% by weight of the first and second types of boehmite particles. The separator does not include a polymer separator layer; has a shrinkage of less than 1% when heated at 220° C. for 1 hour; and swells by less than 5% when soaked in propylene carbonate for 1 hour.

Embodiments described herein relate generally to electrochemical cells including a selectively permeable membrane and systems and methods for manufacturing the same. In some embodiments, the selectively permeable membrane can include a solid-state electrolyte material. In some embodiments, electrochemical cells can include a cathode disposed on a cathode current collector, an anode disposed on an anode current collector, and the selectively permeable membrane disposed therebetween. In some embodiments, the cathode and / or anode can include a slurry of an active material and a conductive material in a liquid electrolyte. In some embodiments, a catholyte can be different from an anolyte. In some embodiments, the catholyte can be optimized to improve the redox electrochemistry of the cathode and the anolyte can be optimized to improve the redox electrochemistry of the anode. In some embodiments, the selectively permeable membrane can be configured to isolate the catholyte from the anolyte.

The invention provides a positive electrode, a low-temperature electrolyte, a low-temperature sodium-ion battery and a preparation method and application of the low-temperature sodium-ion battery, and belongs to the technical field of battery materials. The low-temperature sodium ion battery comprises a positive electrode, a negative electrode and a low-temperature electrolyte, wherein the positive electrode comprises a positive electrode active material, a binder, sodium salt containing fluorine and sulfur and conductive carbon; the positive electrode is improved by adding sodium salt containing fluorine and sulfur, sulfur / fluorine rich in anion derivatives can be formed on a contact interface of the positive electrode and an electrolyte to form a firm SEI film, the internal resistance of the battery is further reduced, and the coulombic efficiency of the battery during charging and discharging at normal and low temperatures is improved. The low-temperature electrolyte comprises an ester solvent and an ether additive, by adding the ether solvent, the physicochemical property of the electrolyte and the composition of an SEI film on a contact interface of an electrode and the electrolyte are optimized, the viscosity of the electrolyte at low temperature is reduced, the ionic conductivity is improved, and formation of the SEI film rich in sodium fluoride on the surface of a negative electrode can be promoted; and thus, the problem of low coulombic efficiency of battery charge-discharge cycle at low temperature is solved.

The invention provides a lithium ion battery and electric equipment, the lithium ion battery comprises a positive pole piece and an electrolyte, active substances in the positive pole piece comprise a phosphate lithium positive pole material and nickel cobalt manganese lithium oxide, and the electrolyte comprises a positive pole film-forming agent, a negative pole film-forming agent and a lithium salt, the lithium salt comprises lithium hexafluorophosphate and lithium bis (fluorosulfonyl) imide, the lithium ion battery meets the following formula: # imgabs0 #, NL is the mass ratio of the lithium nickel cobalt manganese oxide to the lithium phosphate positive electrode material, Salt is the sum of the molar concentrations of the lithium hexafluorophosphate and the lithium bis (fluorosulfonyl) imide in the electrolyte by taking mol / L as the unit, and the sum of the molar concentrations of the lithium hexafluorophosphate and the lithium bis (fluorosulfonyl) imide in the electrolyte is the sum of the molar concentrations of the lithium hexafluorophosphate and the lithium bis (fluorosulfonyl) imide. Add is the mass ratio of the positive electrode film-forming agent to the negative electrode film-forming agent. When the ternary material is doped in the lithium manganese iron phosphate or the lithium iron phosphate, the proportion of the positive and negative electrode film-forming agents and the proportion of the heat-resistant high-lithium salt can be adjusted according to the mixing proportion of the lithium manganese iron phosphate and the lithium iron phosphate, so that the cycle performance of the battery is improved.

A pressure sensitive adhesive electrolyte (PSAE) was prepared by polymerizing in two steps, e.g., (a) UV syrup preparation and (b) curing by UV web polymerization or UV polymerization of a mixture comprising at least the following components: • 4 – 86 wt % of acrylate monomer (a1) from the group of the (meth)acrylic esters having 4 – 44 carbon atoms and containing at least one oxygen atom, • 0.5 – 50 wt % of acrylate monomer (a2) from the group of the (meth)acrylic esters or amides having 4 – 25 carbon atoms and containing at least one nitrogen atom, • 0.005 – 10 wt % of at least one initiator, wherein the at least one initiator is preferably a thermal initiator and / or a photoinitiator, especially preferably at least one photoinitiator, • 0 – 35 wt % of conducting salt, • 2 – 60 wt % of ionic liquid, wherein the ionic liquid is preferably a room temperature ionic liquid (RTIL), • optionally further additives like plasticizer, antioxidant, tackifier, chain transfer agent, filler, corrosion inhibitor, oxygen scavenger, additional monomers, as for example 0 to 50 wt %, wherein optionally one or more of the components are added at least proportionally, as for example completely, only during or after the polymerization. With such PSAE conductivities according to the invention an ionic conductivity by test B of more than 10-6 S / cm up to at least 10-3 S / cm, can be achieved and the PSAE is suitable for applications like electrochromic cells / dimming foils and PSA with electrically debonding function. Especially, with such PSAE conductivities according to the invention, an ionic conductivity by test B of more than 10-8 S / cm up to at least 10-3 S / cm and peel adhesion by test A up to around 9 N / cm can be achieved.

An electrolyte and a battery. The electrolyte comprises a first lithium salt, a second lithium salt and a first additive, the first lithium salt at least comprising lithium bis(fluorosulfonyl)imide, the second lithium salt being one or two selected from lithium difluoro(oxalato)borate and lithium difluoro(bisoxalato) phosphate, and the first additive being methylene methanedisulfonate. On the basis of the electrolyte comprising the first lithium salt and the second lithium salt, the first additive, i.e. methylene methanedisulfonate (MMDS), is further added in the electrolyte; the second lithium salt helps to improve the cycling stability and high-temperature storage performance of batteries, and the first additive helps to improve the oxidation resistance of the second lithium salt under high voltages, so as to further modify the composition and structure of SEI films, thus reducing the impedance of SEI films, improving the stability of SEI films, and improving the cycling performance and high-temperature storage performance of batteries.

A non-aqueous electrolyte for a lithium-ion cell includes a base electrolyte consisting of lithium hexafluorophosphate or lithium bis(fluorosulfonyl)imide or a combination thereof in methyl propionate; about 2 to about 15 parts by weight, preferably about 6 to about 15 parts by weight of vinylene carbonate; and about 0.5 to about 5 parts by weight, preferably about 2 to about 5 parts by weight of an additive comprising lithium difluorophosphate, lithium difluoro(oxalate)borate, lithium bis(oxalate)borate, or a combination thereof, wherein the content of the vinylene carbonate and the additive are each based on a total weight of the base electrolyte, the vinylene carbonate, and the additives.

The invention relates to the technical field of electrolytes, and discloses a sulfonate additive containing a silicon-oxygen bond, an electrolyte and an electrochemical device, the additive is a sulfonate organic compound containing the silicon-oxygen bond, the additive is added into the electrolyte, the gas production effect of battery formation can be inhibited, and the high-temperature cycle performance of a battery can be improved. According to the sulfonate additive containing the silicon-oxygen bond, the use amount of a high-risk substance 1, 3-propane sultone in an electrolyte can be reduced, the use amount of the 1, 3-propane sultone can be remarkably reduced on the premise that the formation gas production effect and the high-temperature cycle performance of a battery are not remarkably changed, and the use amount of the 1, 3-propane sultone can be remarkably reduced on the premise that the high-temperature cycle performance of the battery is remarkably improved. The 1, 3-propane sultone belongs to a high-risk cancerogenic substance, and the safety risk of the battery can be remarkably reduced by reducing the dosage of the 1, 3-propane sultone in the electrolyte.

The present application provides a battery cell, a battery, and an electrical device, belonging to the field of battery technology. The battery cell includes a positive electrode sheet and an electrolyte solution. A coating mass of a positive electrode active material layer on a single side of the positive electrode sheet is 410 mg / 1540.25 mm2 to 550 mg / 1540.25 mm2, and a membrane resistance of the positive electrode sheet is ≥1Ω. A conductivity of the electrolyte solution is ≤14 mS / cm. The battery cell has thick coated electrode sheets, where the lower membrane resistance of the positive electrode sheet indicates its higher conductivity, which is conducive to reducing solid-state ohmic resistance of the battery cell. The higher conductivity of the electrolyte solution is conducive to reducing liquid-phase ohmic impedance of the battery and alleviating concentration polarization to some extent.

A method for a tightness test of a test object filled with a liquid, said test object having an internal pressure which is lower than atmospheric pressure, comprising the following steps: inserting the test object into a test chamber, evacuating the test chamber to a pressure which is lower than the internal pressure inside the test object, drawing off the test chamber residual gas components together with gas components desorbing from a wall of the test chamber and parts of the liquid escaping from the test object through a leak in the latter without any carrier gas being fed to the test chamber from outside, transporting the drawn-off residual gas components together with the parts of the liquid escaped from the test object to a detector, and detecting parts of the liquid escaped through a leak in the test object by means of a detector.

The invention provides a sodium ion battery, an energy storage device and an energy storage system. The sodium ion battery comprises a positive pole piece, a diaphragm, a negative pole piece and an electrolyte, the negative pole piece comprises a carbon material, the specific surface area of the carbon material is x, the carbon material comprises mesopores, the number percentage of the mesopores in the carbon material is y, and the electrolyte comprises an organic solvent, an electrolyte salt, an organic additive and a sodium salt additive, the organic solvent comprises cyclic carbonate and chain carbonate, the mass fraction of the cyclic carbonate in the electrolyte is a, the mass fraction of the chain carbonate in the electrolyte is b, the mass fraction of the organic additive in the electrolyte is c, and the mass fraction of the sodium salt additive in the electrolyte is d; the sodium ion battery meets the relational expression of 0.4 < = a / y < = 0.8; 0.5 < = a / b < = 1.3; 0.4 < = c / x < = 1.2; and 0.1 < = d / c < = 0.5.

The present disclosure provides a method of manufacturing an electrode using a continuous coating line for applying an electrode coating layer on a substrate surface of a substrate, the continuous coating line comprising a coating apparatus comprising a coating head and a coating fluid supply system, and at least one oven comprising a heating element, and a substrate carrier for carrying the substrate, the method comprising continuously carrying the substrate through the continuous coating line using the substrate carrier; continuously applying a battery electrode slurry composition from the coating head to the substrate surface to form a wet coated substrate, wherein the battery electrode slurry composition is continuously fed into the coating head by the coating fluid supply system; and heating the wet coated substrate in the oven to form a dried coating on the substrate.

A positive electrode material of the present disclosure includes: a positive electrode active material; and a first solid electrolyte material coating at least partially a surface of the positive electrode active material, wherein the first solid electrolyte material includes Li, Ti, M1, and F, and the M1 is at least one element selected from the group consisting of Ca, Mg, Al, Y, and Zr.

The invention provides a positive electrode active material, positive electrode slurry, a positive plate, a battery and a vehicle, and belongs to the technical field of batteries, the positive electrode active material comprises lithium manganese iron phosphate and nickel cobalt lithium manganate; wherein the mass ratio of the lithium manganese iron phosphate to the nickel cobalt lithium manganate is (50-95): (5-50); the chemical general formula of the nickel cobalt lithium manganate is LiNiaCobMn (1-a-b) O2, a is more than or equal to 0.6 and less than 1, b is more than 0 and less than 0.5, and a + b is more than 0 and less than 1. According to the present invention, the lithium manganese iron phosphate and the nickel cobalt lithium manganate are compounded to serve as the positive electrode active material, and the mass ratio of the lithium manganese iron phosphate to the nickel cobalt lithium manganate is controlled within the range of (50-95): (5-50), such that when the positive electrode active material is applied to the battery, the high safety performance can be provided while the high energy density is provided so as to improve the comprehensive performance.

A non-aqueous electrolyte solution for a lithium secondary battery and a lithium secondary battery including the same are disclosed herein. In some embodiments, a non-aqueous electrolyte solution includes a lithium salt, an organic solvent, and a compound represented by Formula 1 as an additive. A lithium secondary battery including the non-aqueous electrolyte solution has improved high-rate charge and discharge characteristics at high temperature.

Disclosed are an ionic liquid, an electrolyte including the ionic liquid, and a lithium secondary battery including the same. The ionic liquid is capable of forming a film having high ionic conductivity on an anode upon reductive decomposition of cations contained therein, and delaying the decomposition of anions.

The lithium secondary battery is characterized in that the negative electrode is a lithium metal element or an alloy containing the same, and the lithium secondary battery uses an electrolyte solution for lithium secondary batteries containing an acrylic acid ester represented by general formula (1): # imgabs0 # formula (1) in which X is a hydrogen atom, a fluorine atom, a chlorine atom, a bromine atom, an iodine atom, or a CFX1X2 group (wherein X1 and X2 are the same or different and are hydrogen atoms, fluorine atoms, or chlorine atoms). ), a cyano group, a linear or branched fluoroalkyl group having 1-21 carbon atoms, a substituted or unsubstituted phenyl group, or a linear or branched alkyl group having 1-20 carbon atoms; y represents a directly linked bond, a C1-10 hydrocarbon group which may have an oxygen atom or a sulfur atom, or a-CH2CH2N (R1) SO2-group (wherein R1 represents a C1-4 alkyl group); ),-CH2CH (OY1) CH2-(In the formula, Y1 represents a hydrogen atom or an acetyl group. ), or-(CH2) nSO2-group (n is 1-10); and Rf is a linear or branched perfluoroalkyl group having 2 to 7 carbon atoms.

The invention provides a secondary battery and electronic equipment, the secondary battery comprises a negative electrode plate and an electrolyte, the negative electrode plate comprises a negative electrode active material layer, the negative electrode active material layer comprises graphite and a silicon carbon material, and the average sphericity of the silicon carbon material is 0.81-0.95; the electrolyte comprises ethylene carbonate, propylene carbonate, ethyl propionate and propyl propionate, based on the mass of the electrolyte, the mass percentage content of ethylene carbonate is a%, the mass percentage content of propylene carbonate is b%, the mass percentage content of ethyl propionate is c%, the mass percentage content of propyl propionate is d%, and the range of (a + b) / (c + d) is 0.23-1.51. According to the invention, the discharge performance and the safety performance of the secondary battery at low temperature can be improved.

The invention provides a battery monomer, a battery device, a power utilization device and an energy storage device. The single-side coating mass of the negative electrode active material layer is 80 mg / 1540.25 mm < 2 > to 150 mg / 1540.25 mm < 2 >, and based on the total mass of the negative electrode film layer active material layer, the mass ratio of the silicon element is 0.5% to 5%; and the viscosity of the electrolyte at the normal temperature is 2.3 mPa.s to 3.5 mPa.s. And the battery monomer gives consideration to improvement of energy density, fast charging performance and cycling stability, and comprehensive improvement of battery performance is realized.

The present invention relates to electrodes formed with a polymer having stabilizing film(s), methods of providing the stabilizing film(s) and electrolyte compositions which can form the stabilizing film(s).

The invention provides a battery monomer, a battery device, a power utilization device and an energy storage device. The size of the positive electrode active material layer in the length direction of the electrode assembly is 300 mm to 950 mm; in the length direction of the electrode assembly, the difference value between the size of the negative electrode active material layer and the size of the positive electrode active material layer is OH1, and OH1 is larger than 1 mm and smaller than 5 mm; in the width direction of the electrode assembly, the difference value between the size of the negative electrode active material layer and the size of the positive electrode active material layer is OH2, and OH2 is larger than 1 mm and smaller than or equal to 4 mm; based on the total mass of the electrolyte, the mass ratio of the carboxylic ester solvent is 8%-57%, and the mass ratio of the fluorine-containing sulfimide lithium salt is 3%-8%. The battery monomer gives consideration to improvement of energy density, fast charge performance, cycle stability under fast charge and safety performance, and comprehensive improvement of battery performance is realized.

The invention discloses an electrolyte additive composition, an electrolyte, a battery and an electric device. The electrolyte additive composition comprises an impedance stabilizing additive and an isocyanate additive in a weight ratio of (0.1-0.8): 1. According to the electrolyte additive composition, the impedance stabilizing additive and the isocyanate additive are compounded, and the content ratio of the impedance stabilizing additive and the isocyanate additive is regulated, so that the stability of the impedance stabilizing additive in the electrolyte can be improved, the DCR of a battery cell is reduced, the stability of the DCR of the battery cell in the charging, discharging and storage processes is improved, and the service life of the battery cell is prolonged. Therefore, the RTE of the battery in the service period is improved. The electrolyte contains the electrolyte additive composition, and the battery contains the electrolyte. The electric device comprises the battery.

The invention discloses an electrolyte, an electrochemical device comprising the electrolyte and a vehicle. The electrolyte comprises a solvent, a first additive and a second additive, the solvent comprises chain carboxylic ester, and the first additive comprises a sulfonate compound or / and a sulfate compound; the second additive comprises vinylene carbonate or / and fluoroethylene carbonate. According to the electrolyte disclosed by the invention, the chain carboxylic ester solvent, the first additive containing the sulfonate compound or / and the sulfate compound and the second additive containing the vinylene carbonate or / and the fluoroethylene carbonate are matched for use; the rapid charging capability and the high-temperature cycle performance of a lithium iron phosphate system battery with high safety performance can be improved, and the application of lithium iron phosphate in a power battery is further widened.

The invention provides a lithium ion secondary battery, a battery cell and an electric device. The lithium ion secondary battery comprises a positive pole piece, a negative pole piece and an electrolyte, a negative active layer of the negative pole piece comprises a silicon-based material, the electrolyte comprises a lithium salt, a solvent and a first additive, the solvent comprises a fluoro-carbonic ester solvent, the first additive comprises a reductive negative pole film-forming additive, and in the electrolyte, the first additive comprises a silicon-based material and a silicon-based material. The mass percent of the reducing negative electrode film-forming additive is 0%-4.5%; the electrolyte further comprises a second additive, and the second additive comprises a deacidification additive. The lithium ion secondary battery has a relatively long cycle life.

The invention provides an electrolyte, a secondary battery and an electric device. The electrolyte comprises a cyclic sulfate compound as shown in a formula I and a metal ion additive. And the cyclic sulfate compound and the metal ion additive contribute to formation of a stable SEI film, and further contribute to improvement of the rate capability of the battery.

The present invention provides a non-aqueous electrolyte characterized by comprising: a lithium salt; an organic solvent; and an additive, wherein the additive includes a compound represented by a specific chemical formula. The non-aqueous electrolyte according to the present invention can suppress the deterioration of a positive electrode, reduce side reactions between the positive electrode and the electrolyte, and form a stable SEI film on a negative electrode, and thus can improve the high-temperature cycle characteristics and high-temperature storage characteristics of a lithium secondary battery comprising the non-aqueous electrolyte.

The present invention relates to a high-voltage lithium metal battery, characterized by its non-flammability due to the high flash point and high thermal stability of its specifically designed electrolyte, thereby ensuring its safe operation. In particular, the battery comprises an electrolyte with lithium salts and a novel diether compound with asymmetrical fluorination, developed based on electrolyte molecular design, synthesis and thermophysical properties characterization. The electrolyte with the asymmetrically fluorinated diether compound exhibits high thermal stability through high boiling point and high flash point, while also having a high working voltage, allowing high energy density designs and simultaneously optimizing operation safety by minimizing flammability and flash risks.

An organofunctional silicone or silane compound suitable for use as an electrolyte is provided. The organofunctional silicone or silane compound may be used to provide an electrolyte composition suitable for use in an electrochemical device. The organofunctional silicone or silane compound can be used as an electrolyte additive, co-solvent, solvent used in an electrolyte formulation which may be suitable for electrochemical devices.

The embodiment of the invention provides a sodium-ion battery and electric equipment, the sodium-ion battery comprises a positive electrode, a negative electrode, a diaphragm and an electrolyte, and the electrolyte comprises a cyclic carbonate solvent and / or a carboxylic ester solvent; the ratio of the mass ratio of the cyclic carbonate solvent in the electrolyte to the sum of the D50 particle size of the positive electrode active material and the D50 particle size of the negative electrode active material is (0.005: 1)-(0.2: 1); the ratio of the mass ratio of the carboxylic ester solvent in the electrolyte to the sum of the D50 particle size of the positive electrode active material and the D50 particle size of the negative electrode active material is 0.002: 1 to 0.1: 1; wherein the unit of the D50 particle size is [mu] m. According to the sodium-ion battery, by reasonably designing the specific incidence relation between the D50 particle size of the positive and negative electrode active materials and the electrolyte solvent, the ion transmission and ion diffusion capability in the charging and discharging process of the battery can be effectively balanced, the low-temperature dynamic performance of the battery is improved, and meanwhile, the high-temperature performance is considered.

The invention discloses a low-temperature zinc ion battery high-entropy eutectic electrolyte and a preparation method and application thereof, and relates to the field of batteries, the electrolyte comprises a hydrogen bond donor, a hydrogen bond acceptor and a solvent; the hydrogen bond donor is at least one of methyl sulfonamide, thioformamide, butyramide, asparagine, tert-butylamine, dimethyl propane diamine, oxalyl diamine, benzamide, sulfamide and ethyl sulfonamide; the hydrogen bond receptor is at least one of aspartic acid, glutamic acid, methionine, zinc chloride, zinc perchlorate, zinc fluoborate and zinc acetate; the preparation method comprises the following steps: mixing a hydrogen bond donor and a hydrogen bond acceptor, and heating to convert a solid into a liquid phase; and adding a solvent, and uniformly mixing to obtain the product. The invention also provides a zinc ion battery containing the electrolyte. The high-entropy eutectic electrolyte has the beneficial effects that-NH2 and halogen or carboxyl form hydrogen bonds to perform eutectic reaction, the freezing point of the eutectic solution is lower than that of a reactant, and the solvent is added to improve the confusion degree of the electrolyte, so that the high-entropy eutectic electrolyte is prepared.