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Composite electrode material for electrochemical devices Invention relates to the field of catalysis, namely to catalytic active porous composite materials, which can be used as carrying electrodes of electrochemical devices for obtaining hydrogen and/or oxygen or high- and medium-temperature solid oxide fuel elements (SOFE). The invention relates to a composite electrode material for electrochemical devices, which contains a metal component in the form of a two-component alloy of nickel with aluminium and a ceramic oxide component; as the two-component alloy used is aluminium-plated nickel, with aluminium content of 3-15 wt %, and as oxide component used is aluminium oxide. The material composition is characterised by a weigh ratio of the metal component to the oxide component in accordance with formula yNixAl100-x-(100-y)Al2O3, where x=85÷97; y=30÷60. |
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Lithium battery and method for its manufacturing Invention relates to electric engineering. The invention suggests the lithium battery that includes at least two volume electrodes divided by a separator and placed together with electrolyte containing anhydrous lithium salt in an organic polar solvent in the battery casing, each electrode has the minimum thickness of 0.5 mm and at least one of these electrodes contains a homogeneous pressed solution of an electroconductive component and active material that can absorb or set free lithium in the presence of electrolyte, at that porosity of the pressed electrodes is within the range of 25% - 90%, the active material has a hollow sphere structure with the maximum length of the wall of 10 micrometers or an aggregate or agglomerate structure with the maximum size of 30 micrometers, whereat the separator contains a high-porous electric insulating ceramic material with open pores and porosity from 30% up to 95%. |
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Method of producing lithium titanate Invention can be used in making lithium cells used in rechargeable batteries. Lithium titanate of formula Li4Ti5O12-x, where 0<x<0.02, is obtained by preparing a mixture of titanium oxide and a lithium-based component, wherein the lithium-based component and titanium oxide are present in the obtained mixture in amounts required to provide atomic ratio of lithium to titanium of 0.8. The lithium-based component includes lithium carbonate powder and lithium hydroxide powder. The obtained mixture is used as a calcination precursor. Further, the mixture is sintered in a gaseous atmosphere containing a reducing agent to form lithium titanate. The sintering step causes a solid-phase reaction between the lithium carbonate powder and titanium oxide and a liquid-solid-phase reaction between lithium hydroxide powder and titanium oxide. |
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Invention can be used in production of electrochemical devices such as batteries. Powder of titanium suboxides contains Ti4O7, Ti5O9 and Ti6O11. Ti4O7, Ti5O9 and Ti6O11 constitute in total more than 92 wt % of powder and Ti4O7 is present in amount higher than 30 wt % of entire powder mass. Powder of said composition is used for manufacturing electrodes and such moulded articles as tubes and plates. |
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Material for oxygen electrode of electrochemical devices Material for an oxygen electrode contains praseodymium and strontium oxide, copper and nickel oxide at the following ratios according to the following formula: Pr2-xSrxCu1-YNiYO4 where x=0.16; Y=0.9. |
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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. |
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Anode material for lithium electrolytic cell and method of preparing said material 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. |
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Active electrode material with oxide layers on multielement base and method of production thereof Invention concerns active electrode material containing layer of multicomponent oxide coating, method of production thereof and electrode containing the said electrode material. Also, invention concerns electrochemical device, preferentially lithium secondary battery, including the aforesaid electrode. According to invention, active electrode material contains (a) particles of lithium-containing compound oxide(s) providing lithium intercalation/deintercalation; and (b) layer of multicomponent oxide coating partially or completely produced on particle surfaces of lithium-containing compound oxide(s) and containing compound presented by the following formula, i.e. Al1-aPaXbO4-b where X is element-halogen, 0<a<1, and 0 <b<1. |
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Double-layer active electrode for electrochemical devices using solid electrolyte Introduced in first layer of double-layer active electrode used for electrochemical devices filled with solid electrolyte incorporating mixture of powdered La1 - xSrxFe1 - yCOyO3 and doped with CeO2 is nanometric powder CuO and/or Cu2O; CeO2 doped with samarium or gadolinium, proportion of ingredients being as follows, mass percent: La1-xSrxFe0.8CO0.2O3 (x = 0.2-0.4), 69.5-36; Ce1 - xSmxO2 - δ (x - 0.1-0.2), 30-60; CuO and/or Cu2O, 0.5-4. Second layer is made of mixture of powdered La2-xSrxMnO3 (x = 0.2-0.4) and copper oxides (CuO and Cu2O) in amount of 9.7-99.5 and 0.5-3 mass percent, respectively. Nanometric powder of PrO2 - δ in amount of 5-10 mass percent is uniformly distributed in both electrode layers. |
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Lithium-ion battery characterized in improved storage properties at high temperature 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. |
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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. |
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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. |
Another patent 2513596.