RussianPatents.com
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Lithium-ion battery characterized in improved storage properties at high temperature. RU patent 2307430. |
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FIELD: electrical engineering. SUBSTANCE: proposed battery has cathode incorporating cathodic dope to improve storage properties of battery at high temperature. Novelty is that used as cathodic dope for battery cathode is metal hydroxide whose specific surface area is large. Lithium-ion battery has cathode, anode, and nonaqueous electrolyte. EFFECT: improved storage properties of battery at high temperature. 7 cl, 3 dwg, 3 tbl, 13 ex
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High electron conduction compound, electrochemical cell electrode incorporating this compound, method for electrode manufacture, and electrochemical cell / 2279148 Proposed high electron conduction compound is characterized in that it relates to ABCO(x - δ) type with potassium-nickel fluorite structure; x + y = 4, δ and ξ are ranging between -0.7 and +0.7. A has at least one metal chosen from group of Na, K, Rb, Ca, Ba, La, Pr, Sr, Ce, Nb, Pb, Nd, Sm, and Cd; B has at least one metal chosen from same group; C has at least one metal chosen from group of Cu, Mg, Ti, V, Cr, Mn, Fe, Co, Nb, Mo, W, and Zr, and/or metal chosen from group of Pt, Ru, Ir, Rh, Pd, and Ni. A and B are not identical, A and C are other than Nb at a time. Hal has at least one atom of halogen chosen from group of F, Cl, Br, and I. Proposed electrochemical cell electrode, method for manufacturing such electrode, and electrochemical cell produced using such electrode are also described in invention specification. |
Vanadium oxide bronze, method for preparation thereof, and use thereof as magnetic or electrode-active material / 2245846 Invention provides novel compound, namely perovskite-type vanadium oxide bronze expressed by empirical formula Mo0.25Cu0.75VO3, where M represents mono-, bi-, and trivalent metal. Preparation of this compound comprises heat treatment of mixture of all initial components in stoichiometric proportions at 1000-1300оС and pressure 60-90 kbar. |
Method for producing laminated-structure surface-modified cathode material for lithium and lithium-ion batteries / 2307429 Proposed method involves use of ball mills or mechanochemical activators for mixing and dispersing some metals and their surface modification with oxides of some metals using aqueous and alcohol solutions of hydroxides, oxyhydroxides, or salts of respective metals forming metal oxides when decomposed at temperatures higher than 600 °C at covering oxide content of 0.5 - 5 mole percent. Process is conducted in open air. |
Lithium storage battery using separator partially covered with gel-like polymer / 2305348 40 to 60% of total area of proposed storage battery separator is covered with gel-like polymer. This separator is characterized in that it enhances rate of plate impregnation with electrolyte and ensures its uniform impregnation thereby elongating active time, capacity, and ability of battery to withstand high discharge currents. In addition, this separator makes it possible to ensure uniform electrolyte reactions thereby preventing lithium precipitation. |
Anodic material for a high capacity secondary lithium element / 2304325 In accordance to invention, anodic material contains a layer of metallic or metalloid core, capable of repeating reaction of alloying/de-alloying by lithium; a layer of amorphous carbon, covering the surface of layer of metallic or metalloid core, and a layer of crystalline carbon, covering the layer of amorphous carbon. Anodic material demonstrates high charge/discharge capacity, due to advantage of metal-based anodic material, and prevents changing of volume of layer of metallic or metalloid core, resulting from repeating reaction of alloying/de-alloying by lithium, due to a layer of amorphous carbon and a layer of crystalline carbon. |
Negative electrode for nonaqueous secondary battery, method for manufacturing the negative electrode and a nonaqueous secondary battery / 2304324 Negative electrode is suggested for secondary chemical current source with nonaqueous electrolyte, including current collector and structure of active material, formed on one or both its surfaces, containing electro-conductive material with low capacity for connection to lithium, at least on one side of current collector, while aforementioned active material structure contains from 5 to 80% mass of active material particles, containing material with high capacity for forming connections with lithium. Such a structure of active material preferably includes a layer of active material, containing particles of active material, and surface covering layer, which is present on a layer of active material. |
Carbon-containing material for lithium-ion accumulator and lithium-ion accumulator / 2282919 Carbon-containing material for lithium-ion accumulator includes dispersed graphite and/or carbon nanostructures, processed by gas plasma in environment of non-organic gas or mixture of non-organic gases with frequency of electric discharge within range 13-40 MHz with power of electric discharge 0,01-0,1 Vt/cm3 and pressure of non-organic gas or mixture of non-organic gas in range 0,2-1,13 torr during 300-500 seconds. Lithium-ion accumulator includes positive electrode, negative electrode, electrolyte and separator, in which one of electrodes is made on basis of aforementioned carbon-containing material. Material does not require usage of complicated technology for its manufacture and cleaning, and during its utilization in electrodes of lithium-ion accumulator is provides significant increase of their specific electrical capacity. |
Rechargeable electrolytic cells of high energy density and nonaqueous electrolytes / 2277272 Novelty is use of nonaqueous electrolyte for proposed cell that incorporates at least one organic solvent and at least one electrolytic-active salt whose formula is as follows: M'(ZRnXq - n), where M' is chosen from group incorporating magnesium, calcium, aluminum, lithium, and sodium; Z is chosen from group incorporating aluminum and boron; R presents radicals chosen from following groups: alkyl-, alkenyl-, aryl-, phenyl-, benzyl-group; X is halogen (I, Br, Cl, F); n = 0 - 3; q = 4. Proposed rechargeable electrolytic cell characterized in high energy density has implanted cathode, metal anode, and electrolyte of mentioned composition. |
Vinylene carbonate mixture and method for its preparing / 2271356 Invention proposes a method for preparing vinylene carbonate mixture. Method involves interaction of monohaloethylene carbonate of the formula (II): wherein X means halogen atom with a dehydrohalogenating agent at temperature in the range 40-80°C but preferably at 60°C in organic solvent medium wherein ethylene carbonate is used as an organic solvent. As a dehydrohalogenating agent method involves using amine, in particular, trialkylamine but preferably triethylamine, and monochloroethylene carbonate is used as monohaloethylene carbonate preferably. Interaction is carried out in inert gas atmosphere preferably. Invention provides preparing vinylene carbonate mixture by a simple and economy method with the high content of vinylene carbonate in the end product. Method provides easily isolation of vinylene carbonate from the prepared mixture by distillation off, for example, under vacuum in the film evaporator. Also, invention relates to a crude vinylene carbonate mixture prepared by above described method that is designated as an additive for lithium-ionic batteries as a component of surface coating material as a monomer for preparing polyvinylene carbonate. |
Primary (non-rechargeable) and secondary (rechargeable) magnesium base batteries / 2269841 Proposed battery has at least one anode, at least one cathode, at least one electrolyte, and current collectors; at least anode of mentioned batteries is magnesium based and optionally cathode and electrolyte may also contain magnesium. These batteries provide for obtaining separate components and for introducing thin layer of magnesium base electrolyte between anode and cathode. |
Positive-plate active material for chemical current supplies and method for producing such materials / 2269185 Novelty is that proposed positive-plate active material has metal cores chosen out of group incorporating Sb, Bi, Cd, In, Pb, Ga, tin, and alloys on their bases; coating is produced from materials of group incorporating hydroxides and oxyhydroxides of metals turned into oxides. |
Fluoroalkyl phosphates, method for their preparing and electrolytes based on thereof / 2265609 Invention relates to new fluoroalkyl phosphates that can be used as electrolytes in primary current sources, secondary current sources, capacitors, super capacitors and/or galvanic units. Invention describes fluoroalkyl phosphates of the general formula (I): Mn+[PFx(CyF2y+1-zHz)6-x]n wherein 1 ≤ x ≤ 6, 1 ≤ y ≤ 8, 0 ≤ z ≤ 2y + 1, 1 ≤ n ≤ 5 and Mn+ means a monovalent, bivalent or trivalent cation, in particular: NR1R2R3R4, PR1R2R3R4, P(NR1R2)kR3 mR4 4-k-m (wherein k = 1-4; m = 0-3 and k + m ≤ 4), C(NR1R2)(NR3R4)(NR5R6), C(aryl)3, Rb or tropylium wherein R1-R8 mean hydrogen atom (H), alkyl or (C1-C8)-aryl that can be substituted partially for F, Cl or Br atoms and wherein Mn+ means Li+, Na+, Cs+, K+ and Ag+ are excluded. Except for, invention describes a method for preparing fluoroalkyl phosphates and electrolytes for primary current sources based on fluoroalkyl phosphates. Invention provides preparing new compounds possessing useful properties. |
Method for preparing lithium complex salts for using in chemical current source / 2246499 Invention relates to a method for preparing lithium complexes salts of the general formula (I): wherein each radical R3-R6 means hydrogen atom (H) or halogen atom (F, Cl or Br). Method involves mixing a) 3-, 4-, 5-, 6-substituted phenol of the formula (III): wherein R3-R6 have above given values with chlorosulfonic acid in acceptable solvent to yield compound of the formula (IV): ; b) intermediate product of the formula (IV) from the stage a) wherein R3-R6 have values given above is subjected for interaction with chlorotrimethylsilane to yield compound of the formula (II) given in the invention description and obtained product is filtered off and subjected for differential distillation; c) intermediate product (II) from the stage b) is subjected for interaction with tetramethanolate borate lithium (1-) in acceptable solvent and the end product (I) is isolated from it. Invention provides the development of a simple method for synthesis of lithium complex salts. |
Method for preparing electrolyte for li/so2 storage battery / 2248071 Novelty is that added to electrolyte solution LiAlCl4 · nSO2 (n = 3 to 9) doped with molecular bromine in the amount of 0.2 to 0.5 mass percent which is commonly used for Li/SO2 accumulators is 1- 2 M solution of LiAlCl4 in SOCL2 pre-saturated with 5 - 25 mass percent of SO2; concentration of solution LiAlCl4 in SOCL2 in electrolyte amounts to 10 - 30 mass percent. Proposed method for electrolyte preparation provides for enhancing storage battery capacity by 1.5 to 1.8 times. |
High-conductivity molded compositions and bipolar plates for fuel cells incorporating these compositions / 2248072 Proposed molded resin composition based on unsaturated molded polymer resistant to corrosion including acid flow induced corrosion at temperatures ranging between -40 and +140 0F (-40 to +60 0C) and capable of molding to produce parts of complex shape and small thickness has high content of conducting fillers. In addition this composition includes rheology modifying agents such as oxides and hydroxides of group II elements: carbodiamides, polyisocyanates, aziridines, polyisocyanates, polytetrafluoroethylene, perfluoropolyester, and polyethylene. This composition is used for molding parts used in electric cells such as fuel cells. |
Method for manufacturing positive plate of li/so2 battery / 2249885 Proposed method for manufacturing positive plates of Li/SO2 batteries includes application of cathode mass in the form of mixture of copper powder, soot, and binder onto current collector followed by sintering, whereupon plate is impregnated with saturated solution of lithium chloride in organic solvent for minimum 10 min.; then solvent is removed, and plate is calibrated in thickness, mass proportion of lithium chloride to copper powder being 0.45 to 0.65. |
Negative plate of lithium-ion cell / 2259616 Novelty is that negative plate of lithium-ion cell has current collector whose surface carries active layer based on mixture of modified graphite and acetylene black taken in proportion of 80 : 20 to 95 : 5, respectively. Content of modified graphite in the form of film, 0.05 - 0.1 μm thick, having specific surface area of 1500 to 2000 m2/g is 3 to 10 mg. |
Method for manufacturing li/liialcl4 nso2/cu, c system battery / 2259618 Novelty is that in the course of battery assembly lithium chloride porous plate, 0.2 - 0.5 mm thick, is placed into space between electrodes and cycling is conducted as follows: first cycle involves battery discharge by 10-20% of Crated and charge to 20-50% of Crated; second cycle involves battery discharge to 2V and its charge to 100-110% of Crated. |
Method for manufacturing rechargeable lithium-polymer batteries and battery manufactured by this method / 2262779 Proposed battery has following structure: collector film; active material of cathode incorporating intercalated transition metal oxide; conducting additive; and polymer that forms gel as it swells in electrolytic salt solution; gel-like polymeric electrolyte incorporating polymer forming gel as it swells in electrolytic salt solution; active material of anode incorporating intercalated material as active component and polymer that forms gel as it swells in electrolytic salt solution; and collector film. |
Fluoroalkyl phosphates, method for their preparing and electrolytes based on thereof / 2265609 Invention relates to new fluoroalkyl phosphates that can be used as electrolytes in primary current sources, secondary current sources, capacitors, super capacitors and/or galvanic units. Invention describes fluoroalkyl phosphates of the general formula (I): Mn+[PFx(CyF2y+1-zHz)6-x]n wherein 1 ≤ x ≤ 6, 1 ≤ y ≤ 8, 0 ≤ z ≤ 2y + 1, 1 ≤ n ≤ 5 and Mn+ means a monovalent, bivalent or trivalent cation, in particular: NR1R2R3R4, PR1R2R3R4, P(NR1R2)kR3 mR4 4-k-m (wherein k = 1-4; m = 0-3 and k + m ≤ 4), C(NR1R2)(NR3R4)(NR5R6), C(aryl)3, Rb or tropylium wherein R1-R8 mean hydrogen atom (H), alkyl or (C1-C8)-aryl that can be substituted partially for F, Cl or Br atoms and wherein Mn+ means Li+, Na+, Cs+, K+ and Ag+ are excluded. Except for, invention describes a method for preparing fluoroalkyl phosphates and electrolytes for primary current sources based on fluoroalkyl phosphates. Invention provides preparing new compounds possessing useful properties. |
Positive-plate active material for chemical current supplies and method for producing such materials / 2269185 Novelty is that proposed positive-plate active material has metal cores chosen out of group incorporating Sb, Bi, Cd, In, Pb, Ga, tin, and alloys on their bases; coating is produced from materials of group incorporating hydroxides and oxyhydroxides of metals turned into oxides. |
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