136results about How to "Reduce discharge capacity" patented technology

A positive electrode active material having a lithium-excess lithium-transition metal composite oxide particle represented by the chemical formula Li1.2Mn0.54Ni0.13Co0.13O2. The lithium-excess lithium-transition metal composite oxide particle has an inner portion (1) having a layered structure and a surface adjacent portion (2) having a crystal structure gradually changing from a layered structure to a spinel structure from the inner portion (1) toward the outermost surface portion (3). The layered structure and the spinel structure have an identical ratio of the amount of Mn and the total amount of Ni and Co.

The invention discloses a method and system for estimating remaining available capacity of a lithium ion power battery pack. The method comprises the following steps: recording the current value in the charging process and the time used by charging, and calculating the total available capacity of the lithium ion battery at the starting time of discharging, thereby obtaining the total available capacity A of the lithium ion battery; recording the open-circuit voltage and the voltage drop delta V in the discharging process, selecting the curvilinear function used by calculating the remaining available capacity percentage through the voltage drop delta V, and obtaining the remaining available capacity percentage a of the lithium ion battery; obtaining the service efficiency of the remaining available capacity SOC of the battery at the current temperature by utilizing the relation between temperature and remaining available SOC; and adding A*a* of all the batteries to obtain the remaining available capacity of the lithium ion battery pack. The system for realizing the method comprises a voltage, current and temperature monitoring module for monitoring the battery pack information, the monitoring module feeds the monitored information back to the MCU, and the MCU outputs the estimated remaining available capacity of the lithium ion power battery.

The invention provides a method for preparing lithium iron phosphate / nanometer carbon composite anode material, which is characterized by comprising the steps as follows: 1) a precursor is pretreated, raw materials are weighed according to the components and weight percentage as follows: 0.2%-15% of catalyst, 5%-15% of lithium salt, 40%-60% of iron salt and 25%-45% of phosphate; the catalyst is one or several kinds of metal Fe, Co and Ni; the raw materials are added with dispersant and then are ball-milled in a ball grinder to prepare the precursor; 2) a carbon nano tube or carbon fiber grows; and 3) lithium iron phosphate or adulterant lithium iron phosphate is prepared. The invention solves the problem that the carbon nano tube is difficult to be dispersed in high-viscosity high-solid lithium iron phosphate slurry, and the invention provides the method for growing the carbon nano tube or the carbon fiber synchronously during the process of preparing the lithium iron phosphate and improves the specific capacity and the cycle life of the lithium iron phosphate under the condition of charging and discharging.

The invention discloses a lithium battery electrode preparation method including polymer material with a stable interface and the application of a lithium battery electrode in a solid lithium battery. The preparation method is characterized in that the polymer material with the stable interface is poly-vinylene carbonate (PVCA) or copolymers thereof. The free radical triggers the monomer to perform mass polymerization to obtain a polymer, the polymer material with the stable interface can form a cover film on the surface of the electrode, thus destruction on the electrode material and decomposition of the solid electrolyte on the surfaces of the positive and negative electrodes can be effectively restrained. Meanwhile, the polymer material can form a stable protection layer on the surface of lithium metal to inhibit the growth of the lithium dendrites, thus the cycle performance of the solid lithium battery is improved. The invention also provides a preparation method of the electrochemical stable polymer material, and the solid lithium battery assembled by using the polymer material.

A repeatedly bendable power storage device. A highly reliable power storage device. A long-life power storage device. A repeatedly bendable electronic device. A flexible electronic device. The power storage device includes a film, a positive electrode, and a negative electrode. The film includes a plurality of projections. A difference between the maximum height and the minimum height of a surface of the film is greater than or equal to 0.15 mm and less than 0.8 mm. The modulus of rigidity of the film is less than 6.5×109 N. The film includes a metal layer. The thickness of the metal layer is greater than or equal to 5 μm and less than or equal to 200 μm. The positive electrode and the negative electrode are surrounded by the film.

A sealed alkaline storage battery using, as a positive electrode active material, nickel oxyhydroxide including Mn as a solid-solution element and having a gamma ratio of 65 through 100%; a sealed alkaline storage battery using, as a positive electrode active material, nickel oxyhydroxide including as an additive or coated with a rare earth element and / or a rare earth compound in a ratio measured based on the rare earth element of 0.05 through 5 wt %; and a sealed alkaline storage battery including, as a positive electrode active material, nickel oxyhydroxide having a half-width of a peak in a lattice plane (003) in an X-ray diffraction pattern of 0.8° or more. The pressure within the battery is not largely increased for a long period of charge-discharge cycles, and hence, the electrolyte hardly leaks.

The invention provides a positive pole material and a lithium ion battery prepared from the positive pole material. The positive pole material contains a positive pole active substance and an additive. The additive is Li5Fe1-xAlxO4, wherein x is greater than or equal to 0.05 and less than or equal to 0.3. Through use of the specific additive Li5Fe1-xAlxO4 in the positive pole material, the irreversible capacity of active lithium of the additive Li5Fe1-xAlxO4 supplies lithium for a negative pole SEI film subjected to Li consumption. The additive has no requirement on the type of the positive pole active substance and has a wide application range. The lithium ion battery with the positive pole material has simple preparation processes, a low cost, high safety and high battery energy density.

The invention belongs to the technical field of corrosion and prevention, and in particular relates to a casting method of an aluminum alloy sacrificial anode. The casting method comprises the following steps: adding basic electrolytic molten aluminum to a resistance furnace; then adding a zinc ingot to obtain molten aluminum alloy; performing jet refining on the molten aluminum alloy by adopting an argon located refining agent; charging argon to refined aluminum alloy melt to degas; drossing oxidizing scum on the surface of the aluminum alloy melt through a drossing tool; adding a low melting point metallic element to drossed aluminum alloy melt; electromagnetically agitating the melt after pressing the low melting point metal; carrying out ceramic filtering; pouring and casting the aluminum alloy melt to a preheated iron anode mould at an even casting speed under the temperature of 700 to 740 DEG C until the mould is full of the aluminum alloy melt; and moving the aluminum alloy melt out of the mould after cooling, solidifying and molding, so as to obtain the aluminum alloy sacrificial anode. The casting method has the characteristics of being short in smelting time, small in loss of iron scale, high in degassing and purifying performances, and low in smelting cost.

The invention provides a cathode material of a lithium-ion secondary battery and a method for preparing the same. The cathode material is a lithium nickel cobalt oxide material doped with a boron element. The preparation method comprises the following steps of: firstly, mixing compounds containing nickel, cobalt and lithium or a mixture consisting of various compounds and compounds containing boron or a mixture consisting of various compounds containing the boron according to a ratio; secondly, pretreating the mixture at a temperature of between 300 and 600 DEG C in an air atmosphere for 1 to 10 hours; thirdly, performing high-temperature synthesis on the mixture at a temperature of between 700 and 850 DEG C in an oxygen atmosphere for 3 to 15 hours; and finally, cooling the mixture to the room temperature, and then grinding and screening the mixture to obtain the lithium nickel cobalt oxide material doped with the boron element. The cathode material has the advantages of high specific capacity, good circulation property and good safety; the cathode material has the advantages of good crystallization property, uniform surface coating, narrow grain distribution and large packing density, so that the battery possesses good electrochemical property; and the preparation method has the advantages of simple production process, fewer steps, low energy consumption, no pollution, zero emission and the suitability for industrialized production.

The invention discloses a lithium ion battery separator, a preparation method thereof and a lithium ion battery, and relates to the technical field of lithium ion batteries. The lithium ion battery separator comprises a PP / PE / PP porous film substrate and a cyclodextrin polymer layer. The preparation method of the lithium ion battery separator comprises the following steps of uniformly coating cyclodextrin polymer paste on the PP / PE / PP porous film substrate to form a cyclodextrin polymer layer, and obtaining the lithium ion battery separator after drying, wherein the cyclodextrin polymer pastecomprises a cyclodextrin polymer and water. By the lithium ion battery separator and the preparation method thereof, the defects that a traditional separator matrix material is not resistant to high temperature and is poor in safety and a ceramic coating separator is easy to damage are overcome, the cyclodextrin polymer layer of the lithium ion battery is difficult to fall off, and the coated separator has relatively good electrochemical performance and mechanical property, is low in thermal shrinkage rate and good in safety and is suitable for high-rate charging and discharging.

A powder which has a hexagonal crystal structure and is used as a positive active material for a non-aqueous electrolyte rechargeable battery, and wherein the nominal composition of the positive active material is represented by LiaNibCocMndAleO2, the values of a, b, c, d, and e in the nominal equation fall within the ranges of 0.05≦a≦1.20, 0.25≦b≦0.93, 0.05≦c≦0.35, 0.01≦d≦0.35, 0.01≦e≦0.15, and 0.9≦b+c+d+e≦1.1, respectively, and the tap density of the powder lies 1.6 to 3.0 g / ml.

The purpose of the present invention is to provide a lithium transition metal silicate type positive electrode active material which has excellent cycle properties and undergoes the decrease in discharge capacity to a reduced extent even when charge and discharge are performed repeatedly. The present invention provides a positive electrode active material characterized by comprising a lithium transition metal silicate which is represented by the general formula Li2-yFe1-xMxSi1-yXyO4 (wherein M represents at least one transition metal selected from the group consisting of Mn, Ti, Cr, V, Ni, Co, Cu, Zn, Al, Ge, Zr, Mo and W; X represents at least one element selected from the group consisting of Ti, Cr, V, Zr, Mo, W, P and B; 0 <= x <= 1; and 0 <= y<=0.25), and which has a mixed phase composed of an orthorhombic structure having a symmetric Pmn21 space group and a monoclinic structure having a symmetric P21 / n space group.

The invention relates to a grid type transverse air-intake turbulent flow type electric dust remover comprising a dust removing device and a vibrator, wherein the dust removing device uses mutliple rows of transverse turbulent flow air-intake grid plates as anode plates, the transverse turbulent flow air-intake grid plates are parallel to an air flow, a cathode wire and a gap used as a flue gas channel are arranged between the adjacent transverse turbulent flow air-intake grid plates in each row, the front ends of the flue gas channels formed by each row of transverse turbulent flow air-intake grid plates are provided with front seal plates at intervals to form a high-voltage electric field outlet channel, the back ends are provided with back seal plates at intervals to form a high-voltage electric field inlet channel, and the high-voltage electric field outlet channel is adjacent to the high-voltage electric field inlet channel. The invention adopts grid type transverse air intake to replace the longitudinal air intake of the conventional dust remover so that tail gas in the electric dust remover is changed into a novel turbulent flow state from the conventional basic layer flow state, the moving route and the running time of charged particles in the dust remover are prolonged so that the opportunity of capturing the charged particles close to or even directly contacting an easy-absorption pole is greatly increased, and meanwhile, a vibration system has a good effect to ensure that the polar plates of the dust remover are clean.

Low temperature discharge capability and high rate discharge capability are improved in an alkaline storage battery that uses as its negative electrode a hydrogen-absorbing alloy electrode employing hydrogen-absorbing alloy particles containing at least nickel and a rare-earth element. An alkaline storage battery uses as the negative electrode a hydrogen-absorbing alloy electrode employing hydrogen-absorbing alloy particles containing at least nickel and a rare-earth element. The hydrogen-absorbing alloy particles have a surface layer and an interior portion, the surface layer having a nickel content greater than that of the interior portion, and nickel particles having a particle size within a range of from 10 nm to 50 nm are present in the surface layer.

The invention discloses a slow-release heat supply device for a heat battery, and belongs to the technical field of heat battery application. The slow-release heat supply device comprises a battery shell, wherein a battery pile is arranged in the battery shell; the outer part of the battery pile is coated with a composite insulation heat insulation layer; the composite insulation heat insulation layer is attached to the battery pile; a spiral winding heat pipe is wound on the outer surface of the composite insulation heat insulation layer; a heating material is filled in the spiral winding heat pipe; sealing tapes are arranged at the two ends of the spiral winding heat pipe; a heat preservation layer is further arranged in the battery shell; and the heat preservation layer is located between the spiral winding heat pipe and the battery shell. By the adoption of the scheme, the heat utilization efficiency can be greatly improved, the thermal shock degree at the moment of activation of the battery pile is reduced, and the device is suitable for a thermal battery which works for a long time.

The invention relates to a preparation method for a positive electrode material of a lithium sulfur battery. Specifically, firstly a ZIF-67 nanomaterial is prepared; then a ZIF-67@GO / CNTS composite material is prepared from the ZIF-67 nanomaterial and a GO / CNTS mixed solution through a spray drying technology; and the composite material is carbonized and doped with sulfur to serve as the positiveelectrode material of the lithium sulfur battery. ZIF-67 is simple in preparation process, relatively high in yield and good in product morphology; a synergistic effect of graphene and a carbon nanotube can be improved through spray drying; the conductivity of a sample is improved; and formed balls are not easy to agglomerate. The spray-dried ZIF-67@GO / CNTS is carbonized, so that a porous structure can more easily carry sulfur, the capacity of the lithium sulfur battery is expanded, and the cycling stability of the lithium sulfur battery is enhanced.

The invention discloses a negative material of a zinc-nickel rechargeable battery which is a composite material containing Sn6O4(OH)4-surface-modified ZnO, metal Zn powder and nano-carbon fiber, the quality percentage is 85-95 percent and 4-13 percent for Sn6O4(OH)4-surface-modified ZnO and metal Zn powder respectively, and the rest is for nano-carbon fiber, wherein the quality percentage of Sn6O4(OH)4 in ZnO is 1-25 percent. PTFE, CMC and PVA are added in the present negative material as binder, stirred uniformly with deionized water and then coated in the current collector foam nickel, and by the processes of drying and pressing, a Zn cathode is fabricated. By using the material to fabricate zinc-nickel rechargeable batteries, the batteries have long service life, stable circulation performance, and can be applied to electric tools, transportation means, electric toys, household appliances, communication instruments and lighting equipment etc.

Disclosed is an Si-based-alloy anode material for a lithium ion secondary battery. The Si-based-alloy anode material comprises an alloy phase configured from an Si primary phase comprising Si, and a compound phase comprising at least two elements. The at least two elements include: at least one first added element (A) selected from the group consisting of Ti, V, Cr, Mn, Fe, Co, Ni, Cu, Zr, Nb, and Mg; and at least one low-melting-point second added element (B) selected from the group consisting of S, Se, Te, Sn, In, Ga, Pb, Bi, Zn, Al, and Ag. The compound phase: (i) contains a first compound phase comprising Si and a first added element (A), a second compound phase comprising a first added element (A) and a second added element (B), and a single phase of a second added element (B) and / or a third compound phase comprising at least two second added elements (B); or (ii) a compound phase comprising Si and a first added element (A), and a single phase of a second added element (B) and / or a compound phase comprising at least two second added elements (B). The average minor axis width of the Si primary phase is no greater than 4 [mu]m. By means of the anode material, it is possible to provide a secondary battery having favorable charging / discharging capacity and cycle life.

The present invention provides an electrode that can be used for a sodium secondary battery having a larger discharge capacity when charging and discharging are performed repeatedly than that of the prior art. This sodium secondary battery electrode contains tin (Sn) powder as an electrode active material. The electrode, particularly, further contains one or more electrode-forming agents selected from the group consisting of poly(vinylidene fluoride) (PVDF), poly(acrylic acid) (PAA), poly(sodium acrylate) (PAANa), and carboxymethylcellulose (CMC), thereby making it possible to provide a sodium secondary battery having even greater electrode performance.

An electrode mixture containing a particulate electrode active material, an electrically conductive material and a binder, wherein the electrode active material comprises a particulate core material and a coating material adhering in the form of particles or a layer to the surface of the core material, the core material is obtained by a method comprising a step of coprecipitating two or more transition metal elements, and the binder comprises a water-soluble macromolecule or a water-dispersible macromolecule or both. An electrode comprising the electrode mixture and an electrode collector. An electrode mixture paste containing the electrode mixture and water. A nonaqueous electrolyte secondary battery comprising a positive electrode, a negative electrode and an electrolyte, wherein the positive electrode is the electrode.

This invention relates to an electric-chemical energy storage cell, especially to a method for preparing diffusion layer of double effect oxygen eledtrode of regenerated fuel cells, 1, eliminating surface oxide film by processing an anti-erosion material with acid solution, 2, depositing a noble metal film on the surface of the anti-erosion material by plating or chemical plating or loading high efficient oxygen-releasing electric catalyst on it, 3, mixing the anti-erosion material after process with water repellent and pore forming agent in an alcohol solvent uniformly to prepare a precursor of a self supporting anti-erosion diffusion layer, 4, eliminating the surface oxide film to the collector by acid to deposit noble metal film by plating or chemical plating, 5, compacting the precursor and the collector together to bake and get a high ratio surface anti-erosion integrated diffusion layer.

The invention provides a medicine composition for treating calculus. The medicine composition consists of the following components in parts by weight: 5-20 parts of christina loosestrife herb, 5-20 parts of lygodium japonicum, 10-30 parts of rheum officinale, 2-10 parts of turmeric, 15-35 parts of semen plantaginis, 5-10 parts of liquorice, 10-30 parts of fructus kochiae, 10-35 parts of dianthus superbus and 2-10 parts of fennel. After nine medicinal materials such as christina loosestrife herb are combined, under the condition that the dosage is equal to or lower than that of a single medicine, the calculus discharging effect is obviously better than that of the single medicine, so that the nine combined medicines achieve a synergistic effect; test shows that the medicine composition has the effects of reducing the quantity of tissue calculus, reducing the content of tissue oxalic acid, suppressing calcium oxalate crystallization formation and stacking and enabling crystals to be loosened, minimized, smashed and easily discharged along with urine, and can further effectively improve symptoms, such as pain in the kidney, the bladder and the urethral canal part and hematuresis, which are caused by lithiasis, reduce injury to tissue organs and protect the tissue organs.

The invention provides a sandwich structure electrode. The sandwich structure electrode comprises a current collector and an electrode composition deposited on the current collector in a sandwich structure form, and the electrode composition comprises a positive / negative electrode active material, a binder and a conductive agent; the sandwich structure is composed of an electrode bottom layer close to the current collector, an electrode surface layer away from the current collector and an electrode middle layer clamped between the electrode bottom layer and the electrode surface layer; and theporosity is gradually increased from the electrode middle layer to the two ends of the electrode bottom layer and the two ends of the electrode surface layer respectively. According to the invention,the coatings with different porosities in the thickness range are utilized to form the sandwich structure electrode, the electrode bottom layer with high porosity guarantees the electrolyte retentioncapacity of the electrode close to the current collector side, the cycle performance of the thick electrode is improved, the infiltration capacity of the electrolyte to the whole electrode can be improved by increasing the porosity of the electrode surface layer, the porosity of the electrode middle layer is low, and it is guaranteed that the whole electrode has good energy density.

The invention relates to the field of lithium ion battery positive electrode materials, in particular to a preparation method of a high-capacity ternary material and application of the high-capacity ternary material in a lithium ion battery positive electrode material. The method comprises the following steps: (1) preparing precursor mixed raw stock; (2) preparing a precursor; (3) preparing precursor and lithium source mixed slurry; (4) preparing a ternary material; the ternary material prepared by the method is narrow in particle size distribution, uniform in particle morphology, high in energy density and excellent in electrochemical performance. Compared with the prior art, the material has the advantages that no organic solvent is used, and the influence of the pH value is avoided;andthe operation method has the advantages of simplicity, feasibility, environmental friendliness, low production cost, high yield, excellent electrochemical performance and the like.

A battery capable of ensuring storage characteristics and overcharge characteristics is provided. The battery comprising a cathode, an anode, and an electrolytic solution. The cathode has a cathode current collector and a cathode active material layer provided on the cathode current collector. The cathode active material layer includes an aromatic compound having three or more benzene rings. The electrolytic solution includes at least one of an ester carbonate containing a halogen and an ester carbonate containing an unsaturated bond.

The present invention relates to a method of chemically modifying a lithium-based oxide comprising at least one transition metal, which comprises, in succession:a step of bringing said oxide into contact with an aqueous solution comprising phosphate ions;a step of separating said oxide from the aqueous solution; anda step of drying said oxide.Use of the modified lithium transition metal oxide as active positive electrode material for a lithium secondary battery.

The invention relates to a method for ultrasonically repairing a lithium cobaltite material in a failed lithium ion battery. The method specifically comprises the following steps of: (1) separating lithium cobaltite powder waste from a used and failed waste lithium ion battery by using a mechanical separation method; (2) filling the lithium cobaltite powder waste in 1-2mol / L lithium hydroxide solution and performing ultrasonic radiation under a room temperature condition for 6-12 hours; (3) cleaning and filtering ultrasonically treated mixed solution by using de-ionized water to obtain black lithium cobaltite paste; and (4) drying under an environment of 50-80 DEG C for 6-10 hours to obtain a repaired lithium cobaltite material. By adopting the ultrasonic radiation method, regeneration ofthe failed lithium cobaltite material is realized, and the lithium cobaltite material can be newly used as a positive material to produce a new lithium ion battery. By adopting the method, the lithium cobaltite material which is produced in the waste lithium battery after use and failure can be effectively treated; and the method has the characteristics of simple process method, strong operability, no secondary pollution and the like, and has high social benefit, economic benefit and environmental benefit.

The invention provides a preparation method of an S@TiO2 / Ti2C composite material used for a lithium sulfur battery positive electrode, in particular comprising the steps of: using resorcinol; Formaldehyde resin spheres were prepared by coating resorcinol with butyl titanate. TiO2 hollow spheres were obtained by calcination of formaldehyde resin spheres. S @ TiO2 composite structure was obtained bya hot melting method. Ti2C was obtained by etching MXene material with hydrofluoric acid. S @ TiO2 and Ti2C were adsorbed in vacuum to form S @ TiO2 / Ti2C composite structure. The structure can effectively adsorb the polysulfide formed during the charge-discharge reaction of lithium sulfide battery, alleviate the volume expansion caused by S material, and improve the electrochemical performance oflithium sulfide battery.

The invention relates to a boron-doped lithium nickel cobaltate anode material. The chemical formula of the boron-doped lithium nickel cobaltate anode material is LiNiXCoYBZO2, wherein 0.7<X<0.9, 0.1<Y<0.3, 0<Z<0.1, and X+Y+Z=1. The preparation method of the boron-doped lithium nickel cobaltate anode material comprises the following steps: 1. proportionally mixing a compound containing nickel, cobalt and lithium and a compound containing boron; 2. in an air atmosphere, pretreating at 300-600 DEG C for 1-10 hours; 3. in an oxygen atmosphere, synthesizing at the high temperature of 700-850 DEG C for 3-15 hours; and 4. cooling to normal temperature, pulverizing, and screening to obtain the final product. In the boron-doped lithium nickel cobaltate anode material provided by the invention, boron is used instead of metal doping ions, thereby enhancing the first capacity, first discharging efficiency, cycle performance and safety of the material; and the method provided by the invention has the advantages of simple production technique, fewer steps, short production time, low energy consumption, no pollution and zero discharge, thereby being very suitable for industrial production.