116 results about "High temperature storage" patented technology

The invention discloses a lithium manganese iron phosphate positive electrode material and a preparation method thereof, a positive electrode plate and a lithium ion battery, and relates to the technical field of lithium ion batteries. The lithium manganese iron phosphate positive electrode material comprises a lithium manganese iron phosphate inner core and a coating shell layer, the surface of the lithium manganese iron phosphate inner core is coated with the coating shell layer; the coating shell layer comprises lithium iron phosphate; the positive electrode material can solve the problem of poor high-temperature storage performance of the lithium manganese iron phosphate material, so that the lithium manganese iron phosphate material has high capacity and high-temperature storage stability.

The present invention belongs to the technical field of batteries, and provides a negative electrode active material, a secondary battery, and an electronic device. The negative electrode active material comprises a silicon-based material and an outer layer material, wherein the outer layer material comprises a conductive agent and a nitrile polymer. The infrared spectrum of the negative electrode active material comprises infrared characteristic peaks of a cyano group. The negative electrode active material comprises nitrogen and silicon; and based on the mass of the negative electrode active material, the mass content of nitrogen is D1%, the mass content of silicon is G%, and 0.02≤D1 / G≤0.5. By forming the outer layer material comprising the conductive agent and the nitrile polymer on the surface of the silicon-based material, the conductivity and the stability of the negative electrode active material can be improved, such that the secondary battery has an excellent cycle capacity retention rate and expansion inhibition performance, and the high-temperature storage performance of the secondary battery can be further improved.

In order to solve the problem that the existing electrolyte is difficult to give consideration to the high-temperature storage life and the improvement of the battery performance, the invention provides a non-aqueous electrolyte, the non-aqueous electrolyte comprises a non-aqueous organic solvent, an electrolyte salt, an additive and a stabilizer, the stabilizer comprises a compound as shown in a structural formula 1, and the additive comprises a compound as shown in a structural formula 2; in the structural formula 1, R1 is selected from C1-C5 halogenated alkyl; in the structural formula 2, n is 0 or 1, and R2 is selected from H, halogen, C1-C3 alkyl or C1-C3 halogenated alkyl. The invention also provides a secondary battery comprising the non-aqueous electrolyte. The non-aqueous electrolyte provided by the invention has a relatively long high-temperature storage life on the basis of improving the electrochemical performance of the secondary battery.

Provided is a nonaqueous electrolyte secondary battery which has a high capacity retention rate after high-temperature storage, a suppressed amount of stored gas after high-temperature storage, low resistance after high-temperature storage, little elution of metal from a positive electrode, and low calorific value at high temperatures. A non-aqueous electrolyte secondary battery provided with a positive electrode having a positive electrode active material capable of intercalating and deintercalating metal ions, a negative electrode having a negative electrode active material capable of intercalating and deintercalating metal ions, and a non-aqueous electrolyte, the positive electrode active material containing a lithium transition metal compound, the positive electrode active material containing at least Ni, Mn, and Co, the molar ratio of Mn / (Ni + Mn + Co) is greater than 0 and 0.32 or less, the molar ratio of Ni / (Ni + Mn + Co) is 0.45 or more, the plate density of the positive electrode is 3.0 g / cm3 or more, and the non-aqueous electrolyte solution contains a monofluorophosphate and / or a difluorophosphate.

Disclosed are an electrolyte and a battery including the electrolyte, the electrolyte includes a solvent, a lithium salt and an additive. The solvent is constituted by a fluorinated solvent, the fluorinated solvent includes fluorinated ethylene carbonate (FEC), and the additive includes diethyl 2-(thiophene methyl)phosphonate (DTYP). The content of DTYP is 0.01% to 1.2% based on the total mass of the electrolyte. The electrolyte of the present disclosure, on basis of using fluorinated solvent as solvent to provide the battery with good high voltage performance, also through the synergistic effect of FEC and DTYP with specific content, forms SEI and CEI films with excellent thermal stability at the positive and negative electrode interfaces, thus enabling the battery to have both good high-temperature storage performance and high-temperature cycling performance.

This invention relates to an electrolyte for lithium-ion batteries or lithium metal batteries, a method for preparing the electrolyte, and a lithium battery. The electrolyte comprises a lithium salt, an organic solvent, and functional additives, wherein the functional additives include aluminum alkoxide compounds. A battery containing the additives is also provided. Based on the discovery that ethylene carbonate (EC) degrades battery thermal safety under high-temperature thermal abuse conditions, aluminum isopropoxide is innovatively introduced as a functional additive. This additive is stable at room temperature, but under high-temperature thermal abuse scenarios, it can act as a Lewis acid catalyst, specifically catalyzing the ring-opening polymerization reaction of EC in the electrolyte to generate polymer segments. Compared with existing technologies, the electrolyte provided by this invention effectively improves the high-temperature storage performance and thermal shock resistance of the battery without sacrificing its room-temperature electrochemical performance.

An electrolyte solution of a lithium-ion battery and a lithium secondary battery. The electrolyte solution of a lithium-ion battery includes an organic solvent, a lithium salt and an additive, wherein the organic solvent includes fluorinated ethylene carbonate accounting for at least 5% of the total mass of the electrolyte solution, the additive comprises an additive A containing one or more compounds which have three or more carbon-carbon double bonds, and the electrolyte solution does not include a compound containing a sulfonyl group. The electrolyte solution of a lithium-ion battery is not only more environmentally friendly, but can also improve the swelling of the battery during the formation and high-temperature storage thereof, the discharge capacity of the battery, and the self-discharge performance of the battery under a high voltage.

A secondary battery and a preparation method therefor, and an electric apparatus. The secondary battery comprises a positive electrode plate, which positive electrode plate comprises a positive electrode current collector and a positive electrode film layer provided on at least one surface of the positive electrode current collector, wherein the positive electrode film layer comprises a positive electrode active material and a material containing a chalcogen element. The secondary battery and an electric apparatus including the secondary battery have improved cycle performance and high-temperature storage performance.

The invention relates to the technical field of batteries, in particular to a lithium supplement agent and a preparation method thereof, a positive pole piece and a lithium ion battery. The lithium supplementing agent comprises an inner core, the inner core comprises Li5Fe1-aMaO4-bXb, M comprises one or more of aluminum, titanium, zirconium, vanadium, manganese, cerium, calcium, copper, magnesium, niobium and zinc, X comprises one or more of nitrogen, fluorine, phosphorus, sulfur, chlorine, selenium, bromine and iodine, a is more than 0.005 and less than 0.05, b is more than 0 and less than 1, and a is more than 0 and less than 1; the carbon coating layer is arranged on at least part of the surface of the inner core. Compared with the prior art, through an anion bulk phase doping and coating strategy, the charge gram capacity which can be exerted by the lithium supplement agent is improved, the energy density is improved, meanwhile, the unit cell stability is improved, the decomposition voltage is reduced, electrolyte decomposition is inhibited, the air stability is improved, and the high-temperature storage gas production rate is remarkably reduced; the long-term storage performance and the safety performance of the battery are further improved, and the application cost and the maintenance cost are reduced.

A facility has an ambient zone (30); a lower temperature storage space; an intermediate temperature storage space (42); a higher temperature storage space (44); a plurality of HVAC systems (430, 432, 434) for controlling temperature and humidity in the storage spaces; automated equipment for moving material through the storage spaces and presenting the material for fulfillment of orders. The automated equipment moves in an automation zone (50, 52) above and traversing the storage spaces (42, 44).

A non-aqueous electrolyte for a lithium secondary battery and a lithium secondary battery including the same are disclosed herein. In some embodiments, a non-aqueous electrolyte for a lithium secondary battery includes a lithium salt, an organic solvent, and an additive comprising a compound represented by the following Chemical Formula 1:wherein Q is a single bond, or a substituted or non-substituted C1-C10 alkyl group, and each of A1, A2 and A3 independently represents hydrogen (H) or a substituted or non-substituted C1-C10 alkyl group. The non-aqueous electrolyte can scavenge decomposition products of lithium salt to maintain passivation of an SEI film during high-temperature storage. The non-aqueous electrolyte improves battery performance by improving self-discharge phenomenon caused by elution from a positive electrode and breakage of the SEI film at a negative electrode. The battery has improved initial efficiency by formation of an initial coating film to inhibit additional electrolyte decomposition.

A method for preparing a single-particle type positive electrode active material precursor includes (a) mixing a nickel-based hydroxide and an inactive lithium salt to prepare a mixture; and (b) performing a first heat treatment on the mixture to obtain a nickel-based oxide in a form of single particles. According to some example embodiments, a positive electrode active material precursor and a method for preparing the same, and a method for preparing a positive electrode active material including the same minimize or reduce the production process, thereby ensuring long cycle-life characteristics and improving high-temperature storage characteristics. A rechargeable lithium battery using the positive electrode active material can exhibit high initial charging and discharging capacity and efficiency, and can implement long cycle-life characteristics.

Provided are a positive electrode, a method for manufacturing the positive electrode, a positive electrode composition, and a rechargeable lithium battery including the positive electrode, the positive electrode including: a positive electrode current collector; and a positive electrode active material layer on the positive electrode current collector and including a positive electrode active material, a copolymer binder, and an amine. The copolymer binder includes a first structural unit including a carboxyl group and a non-ionic second structural unit, and the carboxyl group and the amine are present in the form of a salt. The positive electrode increases capacity while reducing production cost, thereby ensuring long cycle life characteristics and improving high voltage characteristics and high temperature storage characteristics. A rechargeable lithium battery including the positive electrode may exhibit high initial charge / discharge capacity and efficiency even under high voltage driving conditions, and may achieve long cycle life characteristics.

The present document describes techniques for extending battery life after long-term and high-temperature storage. These techniques delay charging of a battery to detect battery conditions and determine whether the battery was exposed to high temperatures while in an idle or low-power state for a long period of time. These techniques include a methodology to relax and refresh an anode surface of the battery, after high-temperature storage, through distinct and tailored discharges prior to beginning a normal charge profile. These techniques can be applied to a wide range of chemistry platforms, which may have kinetic (Li-ion) limitations, to extend the longevity of the battery by reducing lithium plating and capacity degradation caused by long-term, high-temperature storage.

Provided is a nonaqueous electrolyte solution for a lithium secondary battery, which includes: a lithium salt; a nonaqueous solvent; a compound represented by Chemical Formula 1; and a compound represented by Chemical Formula 2; wherein the volume ratio of the compound represented by Chemical Formula 1 and the compound represented by Chemical Formula 2 contained is 1:0.1 to 1:1.5. In addition, a lithium secondary battery having improved high-temperature storage safety is provided by containing the nonaqueous electrolyte solution for a lithium secondary battery.

This application relates to the field of electrochemical technology and provides a secondary battery, including a positive electrode, a negative electrode, and a separator. The positive electrode, negative electrode, and / or separator include a metal-organic compound, and the metal-organic compound includes M... a Zr6O m (OH) n (OL) 6‑(x+y) / 2 (sol) x (blank) y N b The unsaturated coordination defect rate of metal-organic composites is 15%~50.1%. Through the above settings, the rate performance, capacity utilization under high and low temperature conditions, internal resistance, cycle life, high temperature storage capacity retention and recovery rate of lithium-ion batteries can be improved.

The application discloses a kind of middle-high nickel low cobalt ternary positive electrode materials and preparation method thereof, belong to lithium ion battery technical field.The method is first with the Al, Zr and Y element of specific raw material single crystal doping, then after twice doping coating, introduce F, W, Ti and other elements to construct composite material, the product not only effectively solves the problem of poor rate performance of existing low cobalt ternary positive electrode material, simultaneously can effectively avoid the poor high-temperature storage of middle-high nickel ternary positive electrode material, prone to gas production phenomenon situation.The application also discloses the middle-high nickel low cobalt ternary positive electrode material prepared by the method and the application of power battery.

Disclosed is a rechargeable lithium battery including a positive electrode including a positive active material; a negative electrode including a negative active material; an electrolyte solution including a lithium salt and a non-aqueous organic solvent; and a separator between the positive and the negative electrodes, the separator including a porous substrate and a coating layer positioned on at least one side of the porous substrate. The negative active material includes a Si-based material; the non-aqueous organic solvent includes cyclic carbonate including ethylene carbonate, propylene carbonate, or combinations thereof, the cyclic carbonate being included in an amount of about 20 volume % to about 60 volume % based on the total amount of the non-aqueous organic solvent; and the coating layer includes a fluorine-based polymer, an inorganic compound, or combinations thereof. The rechargeable lithium battery has improved cycle-life and high temperature storage characteristics.

The invention relates to the technical field of batteries, in particular to a battery. The battery comprises a positive plate and electrolyte, the positive plate comprises a positive current collector, a bottom coating and a positive active layer, and the bottom coating is located between the positive active layer and the positive current collector; the positive electrode active layer comprises a cobalt-containing positive electrode material; the bottom coating comprises a lithium supplementing agent and silicon dioxide, the lithium supplementing agent comprises lithium-rich lithium nickelate and / or lithium-rich lithium ferrite, the lithium-rich lithium nickelate comprises a substance with the chemical formula of Lia1Nib1M1c1O2, and M1 comprises at least one of elements Mn, Co, Al and Mg; the lithium-rich lithium ferrite comprises a substance with a chemical formula of Lia2Feb2M2c2O2, and M2 comprises at least one of elements of Mn, Co, Al and Mg; the average particle size of the silicon dioxide is 5-50nm; the electrolyte comprises a nitrile additive. According to the battery, the high-temperature storage and mechanical safety performance can be improved while the initial coulombic efficiency is improved.

This application relates to the field of battery technology, providing a battery cell and its preparation method, a battery device, and an electrical device. The battery cell provided in this application includes a positive electrode sheet, which includes a positive current collector and a positive electrode film layer disposed on at least one side of the positive current collector. The positive electrode film layer includes a positive electrode material, a first binder, and a first conductive agent. The first binder has a fibrous structure, and based on the total mass of the positive electrode film layer, the content of the first binder is less than or equal to 1.2 wt%. In the battery cell of this application, the specific surface area of ​​the positive electrode sheet is controlled at a low level while the compaction density is controlled at a high level. This helps to improve the integrity of the positive electrode material, making it less likely for fresh interfaces to be generated due to particle breakage. This significantly suppresses side reactions in the battery, thereby significantly improving the battery's capacity retention rate, resulting in better high-temperature storage performance.

The invention discloses a fluorine-containing pyridyl compound electrolyte and application thereof, the electrolyte comprises 5-25 wt% of a main lithium salt, 70-90 wt% of a non-aqueous solvent and 0.5-15 wt% of an additive, the additive at least comprises a fluorine-containing pyridine compound and a fluorosulfonyl estersil additive, and the specific structure is shown in the specification; the fluorine-containing pyridine compound accounts for 0.02-5.0 wt% of the total mass of the electrolyte, and the fluorine sulfonyl estersil additive accounts for 0.1-5.0 wt% of the total mass of the electrolyte. According to the electrolyte, through the synergistic effect of the additives, the problems that the fluorine-containing pyridine compound is high in impedance and poor in normal-temperature and low-temperature performance are solved, and the high-temperature performance, especially the high-temperature storage performance, of the battery is further improved.

The invention discloses a battery monomer, a battery and a power utilization device. The battery monomer comprises a positive electrode, a negative electrode and an electrolyte, and the electrolyte comprises a solvent, a diluent and an electrolyte salt; the diluent comprises an inert solvent; and the electrolyte salt comprises sulfonamide lithium salt. According to the embodiment of the invention, the long cycle stability and high-temperature storage performance of the battery can be improved.

Provided are a negative electrode material and a preparation method thereof and a lithium ion battery. The negative electrode material includes natural graphite and a coating layer coated on the surface of the natural graphite, and the compression index K of the negative electrode material is: 30≤K≤80; in which the compression index K=100(V0-VF) / V0, where V0 is the apparent volume per unit mass in a loose state, and VF is the tapped volume per unit mass. The negative electrode material of an embodiment has suitable powder fluidity, reduced functional groups on the surface of negative electrode material particles, is easy to disperse during processing, and at the same time, fewer functional groups on the surface reduce side reactions during high temperature storage, thereby improving the high temperature storage performance of the negative electrode material.

The present application relates to a kind of lithium ion battery electrolyte and lithium ion battery, to solve the problem that lithium ion battery electrolyte in the prior art cannot simultaneously consider the normal temperature cycle performance, high temperature storage safety and low temperature discharge efficiency of lithium ion battery, the present application provides a kind of lithium ion battery electrolyte, it includes solvent, lithium salt and additive, wherein additive includes nitrobenzonitrile derivative, nitrobenzonitrile derivative is one or more of the compound shown in general formula (1), general formula (1) is: R1, R2 It is independently H, F, alkyl, fluoroalkyl, oxygen alkyl, sulfur alkyl, nitro or cyano, and nitrobenzonitrile derivative does not include p-nitrobenzonitrile.The lithium ion battery electrolyte of the present application has obvious improvement to the normal temperature cycle performance, high temperature storage performance and low temperature discharge performance of lithium ion battery.

The present application relates to a kind of lithium battery electrolyte and lithium ion battery, mainly solve the poor lithium ion battery normal temperature cycle performance, high temperature storage gas production and low temperature discharge efficiency problem.The electrolyte of the present application includes solvent, lithium salt and additive, additive includes phosphorus-containing additive, phosphorus-containing additive is one or more of the compound shown in general formula (1), general formula (1) is: R1, R2, R3, R4 independently be alkyl, fluoroalkyl, alkoxy, fluoroalkoxy, alkenyl, fluoroalkenyl, alkenyloxy, fluoroalkenyloxy, alkynyl, fluoroalkynyl, aryl, aryloxy, cyano, silane, ether silane group or amine group, A indicates structure formula 1: Structure formula 2: Or structure formula 3: m≥0, n≥0, R5 indicates H, F or alkyl, R6 indicates O, S or =C x H 2x , R7 indicates -C x H 2x - x≥1.The present application very good solution to the above-mentioned problems commonly encountered in lithium ion battery, can be used in the industrial production of lithium battery.

The present application relates to the technical field of lithium ion batteries, and provides a lithium ion battery, which comprises a battery cell and an electrolyte, and the battery cell comprises a positive electrode sheet, a diaphragm and a negative electrode sheet which are arranged in a stack, the positive electrode sheet body has a first surface and a second surface which are opposite to each other along the thickness direction, a plurality of protruding parts exist on the first surface of the positive electrode sheet, and corresponding recessed parts exist on the second surface, the electrolyte contains A wt% of a sulfur-containing additive, the sulfur-containing additive comprises at least one of a sulfonate, a sulfate and a sulfite, 0.3≤H / T≤6 and 0.1≤A≤6, wherein H is the height of the protruding part, the unit is μm, T is the thickness of the diaphragm, the unit is μm, 1≤D≤8, and / or 0.3≤Z=H / D≤80, 0.02≤A / Z≤4. The battery has good electrochemical performance and safety performance, can inhibit the generation of lithium dendrites of the negative electrode, and can improve the self-discharge performance and relieve the gas generation in high-temperature storage.

The utility model provides a wind-light fuel gas heat storage hydrogen production system based on elemental sulfur, which comprises a wind-light power generation unit used for collecting wind energy and solar energy, converting the wind energy and the solar energy into electric energy and transmitting the electric energy; the electric heater is connected with the wind-solar power generation unit so as to convert electric energy into heat energy; the heat storage unit comprises an elemental sulfur high-temperature storage tank and an elemental sulfur low-temperature storage tank; the water electrolysis hydrogen production unit is used for electrolyzing water to produce hydrogen; the heat exchanger comprises a first side which exchanges heat and is connected with the heat storage unit and a second side which is connected with the water electrolysis hydrogen production unit; the first sulfur circulating pump and the second sulfur circulating pump are used for providing circulating power for elemental sulfur; and the elemental sulfur high-temperature storage tank, the first sulfur circulating pump, the first side of the heat exchanger, the elemental sulfur low-temperature storage tank, the second circulating pump and the electric heater are sequentially connected to form an acting loop of elemental sulfur. According to the utility model, the utilization efficiency of energy can be improved.

The utility model provides a double-temperature automatic refrigeration house capable of achieving low-temperature and high-temperature alternate storage, relates to the technical field of automatic refrigeration houses, solves the problem that the size of a temperature zone cannot be adjusted when an existing double-temperature automatic refrigeration house is used, and comprises a double-temperature automatic refrigeration house body which comprises a house body and a partition plate. A first sliding groove is formed in the inner wall of the top of the garage body, second sliding grooves are formed in the inner walls of the two sides of the garage body, a first sliding block is installed on the top of the partition plate and located in the first sliding groove, and second sliding blocks are installed on the surfaces of the two sides of the partition plate and located in the second sliding grooves. And grooves are formed in the surfaces of the partition plate, the first sliding block and the second sliding block. According to the device, through cooperative use of the first sliding groove, the second sliding groove, the first sliding block, the second sliding block, the groove, the inflatable sealing gasket and the fixing mechanism, the size of a temperature zone in the refrigeration house can be rapidly adjusted, and practicability is improved.

An anode active material for a lithium secondary battery according to an embodiment of the present invention includes a first anode active material and a second anode active material, each of which includes a carbon-based active material and has a crystallite size in a range from 50 nm to 60 nm. An XRD orientation ratio of the first anode active material is in a range from 0.9 to 1.2, and an XRD orientation ratio of the second anode active material is in a range from 1 to 5. High-temperature storage and life-span properties are improved while maintaining high capacity using the combination of the first and second anode active materials.