Auxiliary lithium ion battery and production method for auxiliary lithium-ion battery
SUBSTANCE: invention relates to the auxiliary lithium ion battery and method of its production. The auxiliary lithium ion battery includes: a positive electrode sheet that includes a layer of a positive electrode active material comprising particles of positive electrode active material; a negative electrode sheet; and a non-aqueous electrolytic solution which comprises a compound containing fluorine, wherein the surface of the particles of the positive electrode active material includes a film containing fluorine and phosphorus, and the Cf/Cp ratio meets value of 1.89≤Cf/Cp≤2.61, where Cf represents the number of fluorine atoms in the film, and Cp represents the number of phosphorus atoms in the film.
EFFECT: invention is designed to increase the battery capacity under the cyclical impact of charging and discharging.
9 cl, 10 dwg, 5 tbl
SUBSTANCE: invention relates to production of anode material with spinel structure for lithium-ion storage batteries. This process comprises mixing of lithium salt Li2CO3, titanium (IV) oxide TiO2 and chromium oxide (III) Cr2O3 in stoichiometric ratio, as carbon precursor. Mixed particles are minced in ball mill and subjected to heat processing. Starch is used as said carbon precursor. Mincing is performed in argon medium while heat processing temperature makes 800-850°C.
EFFECT: high specific capacity and reversible cycling.
1 ex, 1 dwg
SUBSTANCE: active material of positive electrode for electric device comprises the first active material and the second active material. The first active material contains transition metal oxide represented by the formula (1): Li1.5[NiaCobMnc[Li]d]O3 …(1), where in the formula (1) a, b, c and d meet the following ratios: 0<d<0.5; a+b+c+d=1.5; and 1.0<a+b+c<1.5. The second active material consists of transition metal oxide of spinel type represented by the formula (2) and having crystalline structure referred to space group Fd-3m: LiMa'Mn2-a'O4 …(2), where in the formula (2) M is metal element with valency 2-4, and a' meets the following ratio: 0≤a'<2.0. Relative content of the first active material and the second active material meets by weight ratio the ratio represented by the following formula (3): 100:0<MA:MB<0:100…(3) (where in the formula (3) MA is mass of the first active material and MB is mass of the second active material).
EFFECT: improving charge-discharge efficiency of the accumulator battery made of the above material.
13 cl, 4 dwg, 6 tbl
SUBSTANCE: invention relates to cathode organic-inorganic hybrid material for secondary lithium-ionic sources of current with composition (C6H4N)*xV2O5*yH2O, where x=0.10-0.12, y=0.7-0.9 in form of nanorolls from 100 to 500 nm long and diameter from 10 to 20 nm with surface area 60 m2/g and pore diameter 20-30 nm. Invention also relates to versions of material obtaining.
EFFECT: claimed material possesses improved mechanical properties, high specific capacity and stability in time.
3 cl, 2 ex, 4 dwg
SUBSTANCE: in the named pressed and rolled stock the binder is the conducting thermoexpanded graphite, and the disperse filler additive is high-disperse carbon and/or mineral powders. The optimum content of the disperse filler additive is 2.5-37.5 wt %. The method of obtaining composite carboniferous material includes the moulding of homogenised mix under the minimum pressure 140 kg/cm2 with the subsequent rolling. The functionally used binder for the process of moulding by pressing and rolling is thermoexpanded graphite.
EFFECT: material prime cost decrease.
14 cl, 1 tbl
SUBSTANCE: invention relates to a cathode material for solid oxide fuel cells (SOFC) based on nickel-containing perovskite-like layered oxides. As perovskite-like oxide, taken is a compound of the general formula Pr2-xSrxNi1-yCoyO4-z, where 0.0<x<1.0; 0.0<y<1.0; -0.25≤z≤0.25.
EFFECT: cathode material possesses simultaneously high oxygen-ion conductivity, which has the value of the thermal expansion coefficient (TEC), close to TEC of the SOFC electrolyte.
1 ex, 2 dwg
SUBSTANCE: invention relates to manufacture of batteries. The device for manufacture of packaged electrodes according to the present invention contains: a pair of cylindrical rotating bodies located with the respective external peripheral surfaces facing to each other, each of which is designed with a possibility to transport a separator due to rotation, holding the separator on the external peripheral surface; the electrode transportation section designed with a possibility to transport the electrode with pre-set form in the direction, tangent with reference to the cylindrical rotating bodies, to the gap between pair of cylindrical rotating bodies; and the connection section, which connects separators together, with the electrode enclosed between a pair of separators transported by the pair of cylindrical rotating bodies. Also the electrode is packaged with separators by means of simultaneous delivery and lamination of the pair of separators from the rotating cylindrical bodies to both surfaces of the electrode transported by the electrode transportation section, and connecting together of the pair of separators delivered to both surfaces of the electrode by means of the connection section.
EFFECT: increase of rate of manufacture of battery electrodes.
4 cl, 21 dwg
SUBSTANCE: invention relates to lithium-carrying iron phosphate in the form of micrometric mixed aggregates of nanometric particles, to an electrode and element, formed from them, to a method of their production, characterised by the stage of nano-milling, at which the micrometric mixed aggregates of the nanometric particles are formed by means of micro-forging. The invention also relates to electrodes and a Li-ionic electrochemical element.
EFFECT: application of claimed invention makes it possible to produce electrode materials making it possible to achieve practical energy density, which is higher than 140 W h/kg, in the lithium-ionic element which can be used to form thick electrodes at the industrial scale.
26 cl, 7 dwg, 1 tbl, 6 ex
SUBSTANCE: positive electrode has an active material of positive electrode which operates at the potential 4.5 V or higher with reference to lithium; and liquid electrolyte contains the fluorinated simple ether represented by the following formula (1), and the cyclic sulphonate represented by the following formula (2): (1). And in the formula (1) R1 and R2, both independently, designate alkylene group or the fluorinated alkylene group, and, at least, either R1 or R2 is the fluorinated alkylene group; and (2) where in the formula (2) A and B, both independently, designate alkylene group or the fluorinated alkylene group, and X designates unary bond or the group - OSO2-.
EFFECT: battery includes a positive electrode which can absorb and emit lithium, and liquid electrolyte.
10 cl, 1 dwg, 5 tbl, 35 ex
SUBSTANCE: method includes formation of porous structure by annealing powder of lanthanum strontium manganite at synthesis temperature not less than 1300°C. At first annealing of lanthanum strontium manganite is carried out at temperature of 1100°C and 1200°C in the air with isothermal exposure of 14 and 10 hours respectively, then the produced powder is pressed using 1% solution of polybutyl methacrylate in acetone as a binder in quantity of 0.2 ml per 5 g of powder, final synthesis is carried out at temperature of 1450°C in the air during 10 hours. Usage of pore agent is not envisaged in the claimed method.
EFFECT: produced oxides have approximately the same porosity.
SUBSTANCE: to obtain lithium titanate of composition Li4Ti5O12 with structure of spinel solution of titanium salt is prepared. As titanium salt chloride and/or sulfate is applied. Ammonium hydroxide is introduced into solution of titanium salt with obtaining hydrated ammonium titanate in solid phase. Solid and liquid phases are separated by filtration. Hydrated ammonium titanate is processed with solution of lithium hydroxide at molar ratio Li:Ti=(1.0-1.04):1.0 and temperature 75-95°C for not longer than 1 hour with obtaining lithium-titanium-containing compound. Separation of said compound is carried out by filtration, with the following incineration at temperature 650-800°C for 0.5-2.0 hours. Obtained lithium titanate is washed with deionised water.
EFFECT: invention makes it possible to reduce lithium hydroxide consumption, reduce duration and power consumption of the process of high pure lithium titanate obtaining, ensure high characteristics of lithium accumulator electrodes, stable at multiple number of charge-discharge cycles.
3 cl, 5 ex
FIELD: chemical current supplies; thionyl-chloride lithium cell cathodes.
SUBSTANCE: proposed cathode of primary thionyl-chloride lithium cell has current collector in the form of metal grid with 3 to 10 mg of modified powdered oxide-coated graphite in the form of active layer provided on one square centimeter of its surface. Each particle of modified oxide-coated graphite is, essentially, film, 0.05-0.1 μm thick, 1500 to 2000 m2/g in specific surface area, that incorporates following ingredients, mass percent: carbon, 80-82; oxygen, 14-16; iron, 0.3-05; silicon, 0.5-1.0; aluminum, 0.1-0.2; chlorine, 1.0.
EFFECT: enhanced discharge-time specific energy.
FIELD: electrical engineering; fuel cells needing in-service regulation of polymeric-electrolyte membrane hydration level.
SUBSTANCE: heat-sensing polymer is introduced in proposed fuel cell to maintain optimal hydration of polymeric-electrolyte membrane. Heat-sensing polymer is disposed near membrane-electrode assembly so that gaseous fuel or oxidant is passed through heat-sensing polymer to membrane-electrode assembly. Heat-sensing polymer swells or shrinks in response to variations in membrane-electrode assembly temperature thereby varying intensity of gaseous-fuel or oxidant flow through heat-sensing polymer.
EFFECT: ability of maintaining optimal hydration of polymeric-electrolyte membrane, enhanced reliability of fuel cell mechanical design.
7 cl, 5 dwg
FIELD: electrical engineering.
SUBSTANCE: invention relates to electrical engineering, particularly to the method of making a catalytic layer for a fuel cell. The method involves dispersion of an alcohol solution of platinum black by passing it through a hollow metallic needle-anode into an electric field between an anode and an annular control electrode which is coaxial with the anode. A potential difference ΔU is applied across the said electrodes. The formed jet of platinum black solution is deposited on the surface of a carrier catalytic layer, placed on a substrate-cathode, at potential difference between the annular control electrode and the cathode ΔU1. Values ΔU and ΔU1 are defined by the expression: 1.5·105r1/2 ln(R/r)≤ΔU≤Ucr, B; ΔU1≈ΔU(L/RC)1/2, V; where r - is the radius of the hole in the needle, m; R - is the radius of the hole in the control electrode, m, L - is the distance between the extractor and the surface of the carrier catalytic layer, m; RC - is the radius of the spot of catalytic layer on the surface the anode, m; Ucr - is the critical value of potential difference between the control electrode and the anode, V, at which flow changes over to multi-jet mode.
EFFECT: easier formation of catalytic layer on the surface a proton-conducting membrane or graphite paper, as well as possibility of controlling structural parametres of the catalytic layer.
4 cl, 4 dwg
SUBSTANCE: electrode for lithium secondary battery has a sheet-like current collector and a layer of active material deposited on said current collector. The layer of active material can absorb and release lithium and contains several columnar particles having at least one bend. The angle θ1 formed by the direction of growth of the columnar particles from the base to the first bend of the columnar particles and the direction of the normal to the current collector is preferably 10° or more and less than 90°. When θn+1 is the angle formed by direction of growth of columnar particles from the n-th bend counted from the base of the columnar particles to the (n+1)th bend and by the direction of the normal to the current collector, and n is an integer which is equal to or greater than 1, θn+1 is preferably 0° or more and less than 90°.
EFFECT: high capacitance, improved charging and discharging periodic characteristics of the lithium secondary battery.
23 cl, 13 dwg, 7 tbl, 5 ex
SUBSTANCE: anode material based on a lithium-titanium spinel contains doping components - chromium and vanadium in equivalent amounts, having chemical formula Li4Ti5-2y(CryVy)O12-x, where x is stoichiometric deviation in the range 0.02<x<0.5, y is the stoichiometric coefficient in the range 0<y<0.1. The method of preparing the anode material involves preparation of a mixture of initial components which contain lithium and titanium and sources of doping chromium and vanadium through homogenisation and grinding, which is carried out until obtaining particles with size not greater than 0.5 mcm, and subsequent step by step thermal treatment with a prepared mixture in a controlled atmosphere of inert argon and reducing acetylene in the ratio of gases in the argon stream: acetylene between 999:1 and 750:250 respectively using the following procedure: at the first step the mixture of components is heated to temperature which is not above 350°C; at the second step heating is continued in the range 350-750°C at a rate of not more than 10°C/min, which enables solid-phase interaction of components; at the third step temperature is raised to 840-850°C and the obtained product is kept at this temperature for not less than 1 hour; at the fourth step temperature is lowered to 520-580°C at a rate of 5°C/min and the obtained anode material is kept at this temperature for not less than 2 hours; at the final step the ready anode material is blown with pure argon while cooling to 40-60°C and then packed.
EFFECT: high electrochemical capacitance (165±5 mA-h/g), high electron conductivity (2·10-2 Ohm-1·cm-1), obtaining anode material from readily available components using conventional equipment.
2 cl, 1 tbl
SUBSTANCE: cathode active material contains a nuclear part of secondary lithium metal oxide particles formed by the aggregation of primary lithium metal oxide particles formed; and an enclosure formed by coating the secondary particles of said nuclear part with olivinic lithium iron phosphate.
EFFECT: improved safety, high recharge characteristics.
14 cl, 15 dwg, 9 ex, 3 tbl
FIELD: process engineering.
SUBSTANCE: invention relates to the method of jointing diverse materials with different plasticity, to composite of diverse materials and electrochemical device. Proposed method comprises two main stages: decorating the surface of higher plasticity material by lower plasticity material particles to produce composite, and jointing produced composite with lower plasticity element by sintering. Said method is suitable for jointing diverse chemically mutually inert materials (for example, metal ceramics) and allows producing firm bond with sharp interface between said materials. Jointed materials can very in shape or size of particles. It is suitable for jointing diverse materials, for example ceramics, metals, glass, glass-ceramics, polymers, cermet, semiconductors, etc., in various forms, e.g. powders, fibres, etc.
EFFECT: jointing materials with different plasticity.
31 cl, 6 dwg, 1 ex
SUBSTANCE: active cathode material for lithium secondary batteries has a nucleus made from secondary particles of a lithium metal oxide, and a shell formed by coating the secondary particles of the nucleus with barium titanate and a metal oxide.
EFFECT: higher safety, thermal stability and improved recharging characteristics.
15 cl, 9 dwg, 3 tbl, 8 ex
SUBSTANCE: anode material for lithium secondary batteries contains a core made from hydrocarbon-containing material and cladding formed on top of the core through dry coating the core part from carbon-based material with a lithium-titanium spinel type oxide.
EFFECT: improved conductivity, high output density and excellent electrical properties.
9 cl, 7 dwg, 7 ex, 3 tbl
SUBSTANCE: in manufacturing method of lithium-ferrum phosphate, which consists in the fact that iron oxide is mixed with ammonium dihydrogen phosphate and lithium hydroxide on dry basis with further mechanical activation and two-stage heat treatment at temperature of 400°C during 4 hours, at temperature of 600°C during 4 hours, according to invention at the first stage iron oxide is mixed with ammonium dihydrogen phosphate and lithium hydroxide is added during plastic flow at torsion at pressure of not less than 2.0 GPa and relative deformation values of 20-22.
EFFECT: simplifying the process for obtaining lithium-iron phosphate, improving its degree of dispersion, capacity and service life of cathodes on its basis.