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60results about How to "Lower valence" patented technology
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High-property absorption and wave absorption type catalyst for VOCs (Volatile Organic Chemicals) catalytic oxidation and preparation of catalyst
InactiveCN103736515ALarge saturated adsorption capacityEvenly distributedMolecular sieve catalystsDispersed particle separationMolecular sievePtru catalyst
The invention provides a high-property absorption and wave absorption type catalyst for VOCs (Volatile Organic Chemicals) catalytic oxidation. The high-property absorption and wave absorption type catalyst has a structural formula: a Cu-Mn-Ce / TiO2-molecular sieve or a CNDs-Cu-Mn-Ce / TiO2-molecular sieve, wherein CNDs serve as a modifier; Cu and Mn serve as catalytic activity components; Ce serves as a promoted catalytic metal; a TiO2-molecular sieve serves as a carrier. The invention further provides a preparation method of the catalyst. According to the catalyst and the preparation method of the catalyst provided by the invention, the treatment cost is greatly reduced and energy is utilized at maximum through the advantages of the combination of a plurality of materials, so that the relatively good VOCs catalytic oxidation effect can be realized under the microwave irradiation.
Owner:XI'AN UNIVERSITY OF ARCHITECTURE AND TECHNOLOGY
Synthesis of lithium ion battery anode material vanadium lithium phosphate using sol-gel method
InactiveCN1785798ALower valenceReduce pollutionCell electrodesPhosphorus compoundsLithium carbonatePhysical chemistry
The present invention relates to method for synthesizing positive electrode material vanadium lithium phosphate of lithium ion cell by using sol-gel process. Said method includes the following steps: adopting sol-gel reaction, using vanadium pentoxide or vanadium trioxide, ammonium dihydrogen phosphate, lithium carbonate and citric acid as raw material to synthesize precursor body of lithium ion cell positive electrode material Li3V2(PO4)3, then under the protection of inert gas roasting said precursor body to make V5+ be completely reduced into V3+ and simultaneously produce product Li3V2(PO4)3.
Owner:NANKAI UNIV
High-strength gas purifying and separating adsorbent as well as preparation and application thereof
ActiveCN101927152AEasy to separateGood dispersionOther chemical processesDispersed particle separationSorbentMixed gas
The invention relates to the fields of separation of mixed gas and purification of feed gas and discloses a high-strength gas purifying and separating adsorbent. CeO2 is introduced into a porous carrier, clay and a caking agent which are loaded with main active components to effectively disperse the main active components. The creative improvement point of the invention is that the CeO2 is effectively introduced into the adsorbent so as to improve the dispersibility of the main active component of Cu<+> or Cu<++> ion, improve the occupation ratio of a metal active center on the surface of the carrier, promote the effective complexation of Cu<+> with CO in the reaction and effectively improve the separation performance of the adsorbent. The CeO2 is introduced to promote an effective silicon and aluminum hydroxyl network to be formed among the carrier, the clay and the caking agent, promote the tight combination among the main active components of the metal ion, the carrier and the caking agent, strengthen the bonding of silicon and aluminum hydroxyl and effectively improve the strength which can reach over 100N. The adsorbent has favorable strength, is beneficial to being applied to a pressure swing adsorption (PSA) device and has improved practicability of wide application.
Owner:DALIAN HAIXIN CHEM IND
Method for preparing anode material vanadium lithium fluorinated phosphate of lithium ion secondary battery
InactiveCN1803593AIncrease discharge voltageHigh charge and discharge capacityCell electrodesPhosphorus compoundsLithiumHydrogen
The invention relates to a preparaiton method for vanadic lithium fluoride phosphate as anode material of lithium cell. Wherein, with low-temperature solid phase reaction, mixing the hydrogen peroxides solution and vanadic oxide to obtain hydrogel; using the ydrogel, ammonium monoacid phosphate, lithium fluoride and acetylene black to compose the predecessor of LiVPO4F; baking the predecessor at inertia gas to reduce V5+ into V3+ completely and obtain the LiVPO4F. This invention simplifies operation, reduces reaction temperature and time and cost. The product has well performance and application future.
Owner:NANKAI UNIV
Lithium ion battery positive electrode active material and preparation method thereof
InactiveCN107342398AInhibit side effectsInhibit thickeningCell electrodesSecondary cellsOxygen atomMo element
The invention relates to the technical field of a lithium ion battery material, and particularly discloses a lithium ion battery positive electrode active material and a preparation method thereof. The lithium ion battery positive electrode active material is characterized in that the average constituent is Li<1+a>Ni<x>Co<1-x-y>Mn<y>MoO2, wherein 0.01<=a<=0.1, 0.6<=x<=0.9, 0.1<=y<=0.2, 0.1<=(x+y)<=0.2, and 0.005<=b<=0.03; and in particle of the positive active material, the concentration of Mo element is continuously and gradiently changed from inside to surface of the particle, and the Mo concentration is gradiently raised from a body phase to surface of the particle. By doping the Mo element into a ternary material in gradient distribution mode, the Mo element in the Li<1+a>Ni<x>Co<1-x-y>Mn<y>MoO2 particle is promoted to be gradiently raised from the body phase to the surface, and the bonding effect between a transition metal element and an oxygen atom is enhanced.
Owner:SHANDONG YUHUANG NEW ENERGY TECH
Method of reclaiming brine solutions using an organic chelant
ActiveUS7144512B2Lower valenceUnwanted impuritySolid sorbent liquid separationSedimentation separationSaline waterSulfur
A method of reclaiming a well completion brine solution by using an organic chelant that is capable of discriminating between (i) iron and non-zinc heavy metals; and (ii) calcium and zinc. The chelant contains a functional group selected from the group —CO2H or —PO(OH)R20 or a salt or ester thereof, —C(O)—, —OE, —SE, —N═C(R2)R3, EO—N═C(R2)R3, —N(R2)R3, and —N(C(O)R1)R2 group optionally substituted with a —COOH or —PO(OH)R20 or a salt or ester thereof, —SE or —OE group, wherein R2 and R3 are independently selected from E or forms, with nitrogen, phosphorous, oxygen or sulfur, a heterocyclic ring; E is R1 or —H; R1 is a C1–C30 alkyl or aralkyl group or a derivative thereof and R20 is —OH or R1.
Owner:BAKER HUGHES INC
A preparation method of cerium oxide nanoparticles and its anti-oxidation application
ActiveCN102285678ALow cytotoxicityStrong cytotoxicityNanotechnologyRare earth metal compoundsSodium acetateAcetic acid
The invention discloses a method for preparing cerium oxide nano particles and antioxidation use thereof and belongs to the field of biological nano materials. The method for preparing the cerium oxide nano particles comprises: adding glacial acetic acid into aqueous solution of a cerate and sodium acetate, uniformly stirring and mixing, heating the mixed solution for 5 to 60 hours, centrifuging,washing and drying an obtained yellow precipitate, and obtaining cerium oxide nano particles. Meanwhile, based on the subunit desorption and re-polymerization of proteins, the cerium oxide nano particles are filled into cavities of apoferritin which is a spherical cavity protein by controlling the opening and closing of the shell of the spherical protein, and thus, the biocompatible nano antioxidant is obtained. The method can improve the biocompatibility of the cerium oxide nano particles, lower the cytotoxicity of the cerium oxide nano particles and improve the antioxidant activity of the cerium oxide nano particles obviously.
Owner:PEKING UNIV
Production method of composite metal oxide functional electrode
ActiveCN110818031AEfficiently achieve reductive removalEfficacy of synergistic reduction treatmentWater contaminantsWater/sewage treatment using germicide/oligodynamic-processNitrate saltsCopper nitrate
The invention provides a production method of a composite metal oxide functional electrode. The production method comprises the following steps: dissolving cobalt nitrate hexahydrate, copper nitrate trihydrate and urea in methanol to obtain a precursor solution, impregnating a carbon cloth in the precursor solution, and carrying out a hydrothermal reaction on the mixture of the carbon cloth and the precursor solution at 160-200 DEG C for 2-4 h to obtain an electrode precursor; and calcining the electrode precursor at 250-350 DEG C for 2-4 h to obtain a Co3O4 / CuO electrode loaded on the carboncloth, impregnating and reducing the carbon cloth loaded with the Co3O4 / CuO electrode in a sodium borohydride solution for 5-15 min to obtain a carbon cloth loaded with a CoO / Cu2O functional electrode, and performing vacuum drying. The CoO / Cu2O functional electrode obtained by the production method has the advantages of excellent reduction catalysis performance, efficient realization of reductionremoval of nitrates, low concentration of intermediate byproducts, and wide engineering application prospect.
Owner:YANSHAN UNIV
Metal oxide doped cerium oxides, method for the preparation thereof, resin composition and cosmetic composition therewith
InactiveUS6623858B1Strong ultraviolet ray shielding abilityHigh transparencyCosmetic preparationsMaterial nanotechnologyCerium(IV) oxideAqueous solution
The present invention relates to the metal oxide doped cerium oxide which has an excellent ultraviolet ray shielding effect and a transparency and whose catalytic activity is reduced. More in detail, relates to the metal oxide doped cerium oxide composed of cerium oxide in which metal ion having larger ion radius than that of Ce<4+> and / or lower valence metal ion than Ce<4+>, such as Ca<2+>, Y<3+>, La<3+>, Nd<3+>, Eu<3+>, Tb<3+>, Sm<3+>, Mg<2+>, Sr<2+>, Ba<2+>, Ce<3+> and so on are doped. Said metal oxide doped cerium oxide can be prepared at the temperature lower than 60° C. and in the condition of pH higher than 5 by reacting aqueous solution of cerium salt, aqueous solution of metal ion having larger ion radius than that of Ce<4+> and / or lower valence metal ion than Ce<4+> and alkali, then adding oxidizing agent. Further, said metal oxide doped cerium oxide can be blended to resin composition or cosmetic composition and can display and ultraviolet shielding effect without spoiling transparency at visible ray region.
Owner:KOBAYASHI KOSE CO LTD +1
Method of reclaiming brine solutions using an organic chelant
ActiveUS20050014654A1Solubility valence stateUnwanted impuritySolid sorbent liquid separationSedimentation separationSaline waterSulfur
A method of reclaiming a well completion brine solution by using an organic chelant that is capable of discriminating between (i) iron and non-zinc heavy metals; and (ii) calcium and zinc. The chelant contains a functional group selected from the group —CO2H or —PO(OH)R20 or a salt or ester thereof, —C(O)—, —OE, —SE, —N═C(R2)R3, EO—N═C(R2)R3, —N(R2)R3, and —N(C(O)R1)R2 group optionally substituted with a —COOH or —PO(OH)R20 or a salt or ester thereof, —SE or —OE group, wherein R2 and R3 are independently selected from E or forms, with nitrogen, phosphorous, oxygen or sulfur, a heterocyclic ring; E is R1 or —H; R1 is a C1-C30 alkyl or aralkyl group or a derivative thereof and R20 is —OH or R1.
Owner:BAKER HUGHES INC
Fuel reactor device for chemical-looping combustion
InactiveCN101995097ALower valenceAchieve separationExothermal chemical reaction heat productionExothermal chemical reactions for heatingHydrogenCarrying capacity
The invention discloses a fuel reactor device for chemical-looping combustion. The device consists of a mixing and reaction chamber, an overflow groove, a transition section, a riser and a carbon dioxide separator, wherein the riser is connected with the mixing and reaction chamber through the transition section; the lower end of the riser is provided with a feed port, and the upper end of the riser is connected with the upper end of the carbon dioxide separator; the lower end of the carbon dioxide separator is connected with the mixing and reaction chamber through the overflow groove; the lower end of the mixing and reaction chamber is provided with a grid plate; the lower end of the mixing and reaction chamber is provided with a solid fuel inlet; a discharge port is formed on the outer side of the mixing and reaction chamber; and a loose air port is formed at the lower end of the overflow groove. Due to the large change of cross sections of the riser and the mixing and reaction chamber change, and the selection of the position of the feed port, the device has the advantages of improving the oxygen carrying capacity of oxygen carrier and guarantees discharge of clean carbon dioxide in chemical-looping combustion, and solving the problem that clean carbon dioxide cannot be obtained during hydrogenation in chemical-looping hydrogenation.
Owner:SOUTHEAST UNIV
Conversion of alkanes to liquid oxygenates
InactiveUS20060009662A1Raise the average valenceLower valenceOxygen-containing compound preparationIron compoundsAlkaneAlkyl bromide
A process is provided for converting an alkane to an oxygenated product by passing an alkane gas over a first fixed bed containing a higher valence bromide salt to produce an alkyl bromide, a hydrobromic acid, and a lower valence bromide salt. The alkyl bromide and hydrobromic acid are conveyed as a gas to a second fixed bed containing a metal oxide and are passed over the second fixed bed to produce the first bromide salt and the oxygenated product. The metal oxide in the second fixed bed is regenerated by passing oxygen over the second fixed bed producing the metal oxide and bromine. The bromine is conveyed as a gas from the second fixed bed to the first fixed bed. The first bromide salt of the first fixed bed is regenerated by passing the bromine over the first fixed bed producing the first bromide salt.
Owner:MARATHON OIL CO
Method for regenerating cathode material of waste lithium ion battery through electrolysis of molten alkali
InactiveCN109825846ALower valenceIncrease the amount of dissolutionWaste accumulators reclaimingElectrode shape/formsElectrolysisHydrogen atmosphere
The invention provides a method for regenerating a cathode material of a waste lithium ion battery through electrolysis of molten alkali. The method includes the following steps: 1) mechanically disassembling the waste lithium ion battery, separating a mixture of the cathode material, and reducing the cathode material of the waste lithium ion battery in an argon and hydrogen atmosphere; 2) mixinghydroxide with the molten alkali, taking the pre-reduced cathode material of the waste lithium ion battery in the step 1) as a raw material, and preparing a high-quality lithium ion battery cathode material by a one-step electrolysis method. The method has the advantages that through pre-reduction, the valence state of transition metal elements in the waste lithium battery is reduced, the dissolution quantity of the transition metal elements is increased, and the problem that high-valence cathode materials are insoluble is solved. Compared with the prior art, the method has the advantages thatthe use of hydrogen peroxide and organic acids is avoided, and the recovery rate is reduced.
Owner:NANJING UNIV
Method of reclaiming brine solutions using an organic chelant
InactiveUS20070131623A1Easy to controlLower valenceSolid sorbent liquid separationSedimentation separationSulfurNitrogen
A method of reclaiming a well completion brine solution by using an organic chelant that is capable of discriminating between (i) iron and non-zinc heavy metals; and (ii) calcium and zinc. The chelant contains a functional group selected from the group —CO2H or —PO(R21)R20 or a salt or ester thereof, —C(O)—, —OE, —SE, —N═C(R2)R3, EO—N═C(R2)R3, —N(R2)R3, and —N(C(O)R1)R2 group optionally substituted with a —COOH or —PO(R21)R20 or a salt or ester thereof, —SE or —OE group, wherein R2 and R3 are independently selected from E or forms, with nitrogen, phosphorous, oxygen or sulfur, a heterocyclic ring; E is R1 or —H; R1 is a C1-C30 alkyl or aralkyl group or a derivative thereof and R20 and R21 are independently selected from —OH, —OR1 and R1.
Owner:BAKER HUGHES INC
Method for separating and producing rare earth from iron-containing rare earth raw ore
The invention belongs to the field of firing and wet comprehensive smelting of rare earth ore and particularly relates to a method for separating and producing rare earth from iron-containing rare earth raw ore. An iron bead product and a rare earth product are obtained through steps as follows: grinding, mixing, agglomerating, distribution in a rotary hearth furnace, smelting separation in the rotary hearth furnace, roasting, water leaching and the like. Under the condition of relatively lower cost, production efficiency and rare earth leaching rate are greatly increased.
Owner:UNIV OF SCI & TECH BEIJING
Lithium silicate coated lithium-rich manganese-based positive electrode material and preparation method and application thereof
InactiveCN110808363ALower valenceIncrease energy densitySecondary cellsPositive electrodesLithiumHalogen
The invention provides a lithium silicate coated lithium-rich manganese-based positive electrode material and a preparation method and application thereof. The chemical general formula of the positiveelectrode material is Li2Mn0.5M0.5O2X / Li2SiO3, M is a + 4-valent transition metal, and X is a halogen element. By introducing + 4-valent transition metal ions and halogen element ions, the valence state of Mn in the obtained modified lithium-rich manganese-based positive electrode material is reduced, and the reaction activity of O is reduced, so that the reversible specific capacity and the cycling stability of the material are improved; meanwhile, the lithium silicate is used for compounding the lithium-rich manganese-based positive electrode material, so that the formation of intercrystalline cracks of the material in a high-pressure process is inhibited, and the capacity retention ratio of the material is improved.
Owner:INST OF PROCESS ENG CHINESE ACAD OF SCI +1
Preparation method of sodium chlorate generator electrode
ActiveCN107034483AChlorine evolution potential is lowHigh oxygen evolution potentialElectrodesSodium chlorateElectrolysis
The invention discloses a preparation method of a sodium chlorate generator electrode. The preparation method comprises the following steps of (1) matrix treatment, (2) preparation of inner-layer active coating liquid, (3) preparation of inner-layer metal oxide, (4) preparation of outer-layer active coating liquid, and (5) preparation of the electrode. According to the novel preparation method of the sodium hypochlorite generator electrode, the prepared electrode has the advantages of being low in chlorine evolution potential, high in oxygen evolution potential, energy-saving, environmentally friendly, long in service life and high in electrolytic efficiency.
Owner:AWS ENVIRONMENT TECH LTD
Open framework fluoride positive electrode material for potassium/sodium ion battery, and preparation method thereof
ActiveCN107104248AAvoid occupyingLower valenceCell electrodesSecondary cellsElectrical batteryOpen framework
The present invention relates to an open framework fluoride positive electrode material for a potassium / sodium ion battery, wherein the open framework fluoride positive electrode material is MxFeF3, M is K or Na, x is more than 0 and is less than or equal to 1, and MxFeF3 is a tetragonal tungsten bronze structure and has an open tunnel structure. According to the present invention, the open framework fluoride adopts potassium ions or sodium ions as the channel supporting filler, and the applications of a class of the tetragonal tungsten bronze structures in the energy storage materials are firstly achieved; and by using the migration ion filler to replace the electrically neutral crystal water molecules, the occupation of the crystal water on the open framework channel is avoided, and the reduction of the valence of the transition metal is achieved so as to easily combine with the non-sodium or non-potassium negative electrode.
Owner:SHANGHAI INST OF CERAMIC CHEM & TECH CHINESE ACAD OF SCI
Method of reclaiming brine solutions using an organic chelant
InactiveUS7674384B2Lower valenceUnwanted impuritySolid sorbent liquid separationSedimentation separationSaline waterSulfur
A method of reclaiming a well completion brine solution by using an organic chelant that is capable of discriminating between (i) iron and non-zinc heavy metals; and (ii) calcium and zinc. The chelant contains a functional group selected from the group —CO2H or —PO(R21)R20 or a salt or ester thereof, —C(O)—, —OE, —SE, —N═C(R2)R3, EO—N═C(R2)R3, —N(R2)R3, and —N(C(O)R1)R2 group optionally substituted with a —COOH or —PO(R21)R20 or a salt or ester thereof, —SE or —OE group, wherein R2 and R3 are independently selected from E or forms, with nitrogen, phosphorous, oxygen or sulfur, a heterocyclic ring; E is R1 or —H; R1 is a C1-C30 alkyl or aralkyl group or a derivative thereof and R20 and R21 are independently selected from —OH, —OR1 and R1.
Owner:BAKER HUGHES INC
Method for recovering valuable metal from waste ternary lithium-ion anode material
ActiveCN110029226AEffective oxidative decompositionPromote oxidative decompositionWaste accumulators reclaimingProcess efficiency improvementKeroseneReaction temperature
The invention discloses a method for recovering valuable metal from waste ternary lithium-ion battery powder. Firstly, the waste ternary lithium-ion battery powder is put into a pit furnace into whichoxygen is fed to be subjected to oxidizing roasting, a roasted product is obtained, the content of carbon in the roasted product is reduced by 99% or above, then, the roasted product is dissolved inan ammonia-ammonium chloride solution system to be put into a reaction still, hydrazine hydrate with the volume fraction being 1.6% is added to serve as a reducing agent, a pH value of an obtained lixivium is adjusted to be 8.00, according to the ratio of O / A being 2, the lixivium is added into an extraction agent, the volume fraction of Versatic 911 is 20%, the volume fraction of sulfonated kerosene is 80%, the reaction temperature is controlled to be 30 DEG C, 5 minutes later after the reaction, raffinate and an organic phase are obtained through separation, and through 3 levels of counter-current extraction, the extraction rate of cobalt is 98% or above. According to the method, adopted equipment is simple, the investment running cost is low, the process energy consumption is remarkablyreduced, and the recovery rate of the valuable metal is high.
Owner:重庆棱镜能源科技有限公司
Production process of potassium humate synergistic fertilizer
InactiveCN108424310ASimple structureIncrease organic matterCalcareous fertilisersBio-organic fraction processingPotassiumRelease time
The invention discloses a production process of a potassium humate synergistic fertilizer. The production process comprises the steps of fermenting, spraying, core making, granulating, coating curing, coating, and finally obtaining the potassium humate synergistic fertilizer. According to the production process in the invention, the limitation of the traditional granulation manner is broken, a granulation method is innovatively provided according to the slow-release requirements, and the potassium humate synergistic fertilizer disclosed by the invention is stable in fertilizer efficiency andhigh in slow-release time controllability.
Owner:拉多美(宁陵)化肥有限公司
Modified mineral-microorganism coupled water purifying material and preparation method thereof
ActiveCN109354209AEasy to cleanIncreased ion exchange rateBacteriaMicroorganism based processesOrganic matterSuspended matter
The invention discloses a modified mineral-microorganism coupled water purifying material and a preparation method thereof. The water purifying material is prepared from the following raw materials inparts by mass: 75-85 parts of a carrier material component A, 15-20 parts of a carrier material component B, 5-10 parts of a carrier material component C, 1-3 parts of a modifying agent and 0.1-0.3 part of a microbial preparation. Effects of minerals and effects of microorganisms are coupled into the water purifying material, by Fe3+ and Al3+ which are loaded on the modified carrier body, the surfaces of particles of the carrier material have positive charge, suspended matters with negative charges in polluted water can be adsorbed effectively, and after precipitates are adsorbed, organic pollutants in the precipitates can provide energy for growth of the microorganisms in the early stage; and after organic matters are dispelled completely, under the effect of the microorganisms, the valence state of loaded high-price cations is reduced, along with generation of H+, H+ can be used as biological energy for the microorganisms, therefore, a bottom mud mineralization process is promoted,and finally, a steady-state foundation bed is formed.
Owner:CCCC ROAD & BRIDGE SPECIAL ENG
A modified nickel-cobalt-manganese ternary cathode material and a preparation method thereof
ActiveCN109244446ALow equipment requirementsLow reaction conditionsCell electrodesSecondary cellsNiobiumManganese
The invention provides a preparation method of a modified nickel-cobalt-manganese ternary cathode material, comprising the following steps: 1) preparation of the modified nickel-cobalt-manganese and 2) preparation of the niobium doped nickel-cobalt-manganese ternary cathode material. The invention also discloses a modified nickel-cobalt-manganese ternary cathode material prepared according to thepreparation method of the modified nickel-cobalt-manganese ternary cathode material and a lithium ion battery using the modified nickel-cobalt-manganese ternary cathode material as the cathode material. Compared with the traditional Ni-Co-Mn ternary cathode material in the prior art, the modified Ni-Co-Mn ternary cathode material prepared by the invention has the advantages of lower production cost, higher gram capacity, higher cycle stability and energy density, more excellent electrochemical performance, longer cycle service life, higher first charge-discharge efficiency, and safer and environmentally friendly use.
Owner:ZHEJIANG WELLY ENERGY CORP
Preparing method of air-permeable chlorine-evolution electrode
ActiveCN107419292AChlorine evolution potential is lowLow running costElectrode shape/formsSodium hypochloriteOperating cost
The invention discloses a preparing method for an air-permeable chlorine-evolution electrode. The preparing method comprises the following steps of (1) base body treatment, (2) precursor deposition bath preparing, (3) deposited layer preparing, (4) thin film middle layer preparing, (5) active solution preparing, and (6) sintering. The preparing method for the air-permeable chlorine-evolution electrode of a novel sodium hypochlorite generator is low in chlorine evolution potential, long in service life, high in electrolytic efficiency and low in operating cost.
Owner:AWS ENVIRONMENT TECH LTD
4.7 V-grade lithium cobalt oxide positive electrode material, preparation method thereof and corresponding battery
PendingCN113603152AIncrease capacityImprove cycle stabilitySecondary cellsPositive electrodesPhysical chemistryBattery cell
The invention discloses a 4.7 V-grade lithium cobalt oxide positive electrode material, a preparation method thereof and a corresponding battery, and belongs to the technical field of lithium ion batteries. The positive electrode material is of a core-shell structure, and the core is lithium cobalt oxide; the shell layer is rare earth metal doped lithium cobalt oxide, the position of Li < + > is replaced by rare earth metal ions, and the doping depth is 1-200nm on the surface of the lithium cobalt oxide; the rare earth metal ions have 4f orbits. The preparation method comprises the following steps: (1) preparing a rare earth metal source, a cobalt source and a lithium source in proportion to form a mixture; (2) calcining the mixture at 800-1200 DEG C for 4-24 hours to obtain a primary calcined product; (3) crushing the primary calcined product, and performing secondary calcination at 800-1200 DEG C for 4-24 hours to obtain a lithium cobalt oxide crude product; and (4) crushing the lithium cobalt oxide crude product to obtain a finished product. The first reversible capacity of the positive electrode material reaches up to 240.1 mAh / g under the charging cut-off voltage of 4.7 V, and the cycling stability is good.
Owner:珠海兴辰研创科技有限公司
Multi-element lithium-rich manganese-based positive electrode material and preparation method and application thereof
InactiveCN110808371ASimple processHigh activityCell electrodesSecondary cellsChemical physicsPhysical chemistry
The invention relates to a multi-element lithium-rich manganese-based positive electrode material and a preparation method and application thereof. The chemical formula of the multi-element lithium-rich manganese-based positive electrode material is expressed as Li2MnaMxM'yM''zO2B, a is greater than or equal to 0.5 and less than 1, x is greater than 0 and less than 1, y is greater than 0 and lessthan 1, and z is greater than 0 and less than 1; B is a halogen element; M is a +4 valence metal; M' is a +5 valence metal; M'' is a +6 valence metal, and Mn is +2 valence. According to the multi-element lithium-rich manganese-based positive electrode material provided by the invention, various high-valence cations are introduced at the same time, and halogen elements are introduced, so that the valence state of Mn and the reaction activity of O are reduced, the stability of the obtained lithium ion battery positive electrode material is improved, and the obtained lithium ion battery positiveelectrode material has the advantages of high voltage and high reversible specific capacity.
Owner:INST OF PROCESS ENG CHINESE ACAD OF SCI +1
Method for controlling valence state equilibrium of electrolyte in energy storage module of all-vanadium liquid flow battery
InactiveCN109841875ALower valenceWill not affect workElectrolyte stream managementElectric energyEngineering
Owner:ZHANGJIAKOU WIND & SOLAR POWER ENERGY DEMONSTRATION STATION CO LTD +1
Electrocatalyst for electrochemical reduction of carbon dioxide, and preparation and application thereof
ActiveCN107841762ALower valenceReduce intensityElectrolytic organic productionElectrodesElectronic structureReactive site
The invention relates to an electrocatalyst for electrochemical reduction of carbon dioxide and a preparation method thereof. The electrocatalyst for electrochemical reduction of carbon dioxide is composed of one or more than two selected from metallorganic compounds and one or more than two selected from aromatic compounds containing -OH. The aromatic compounds interact with the metallorganic compounds via -OH to reduce the valence, C-N bond strength and electronic structure of the metallorganic compounds, so the amount of active sites is increased, and the adsorption strength of reactants and intermediates on the surface of the electrocatalyst are regulated; and thus, the activity and selectivity of the electrocatalyst are improved.
Owner:DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
Preparation method of catalyst for alkane oxidation
ActiveCN103920516AImprove conversion rateGood choiceOrganic compound preparationCatalyst activation/preparationAlkaneAcetic acid
The invention discloses a catalyst for alkane oxidation, wherein the phosphorus-vanadium atom ratio is 1: (0.9-1.0), the phosphorus-molybdenum atom ratio is 1: (0.001-0.1), the phosphorus-aluminum atom ratio is 1: (0.9-1.1), and the phosphorus-oxygen atom ratio is 1: (7-10). A preparation method of the catalyst comprises the following steps: synthetizing a phosphorus-vanadium-oxygen precursor, synthetizing immobilized ammonium molybdate, synthetizing the catalyst, and activating the catalyst. The catalyst is used for preparing acetic acid through ethane oxidation, preparing crylic acid through dimethylmethane oxidation, and preparing fumaric acid and / or cis-butenedioic anhydride through butane oxidation. The preparation method has the advantages of simple technology, low production cost, nontoxicity, and low energy consumption and environment friendless during the production process.
Owner:大连进化科技有限公司
Rheological phase method for modifying lithium ion cathode material Li3V2(PO4)3 by adopting PEG composite system
InactiveCN102522554ATake advantage ofLower valenceCell electrodesLithium hydroxidePolyethylene glycol
The invention relates to a rheological phase method for modifying a lithium ion cathode material Li3V2(PO4)3 by adopting a PEG composite system. The rheological phase method comprises the steps of: mixing an aqueous hydrogen peroxide solution with vanadium pentoxide for reacting to obtain a vanadium pentoxide hydrogel; further synthesizing a precursor of the lithium ion cathode material Li3V2(PO4)3 by using the vanadium pentoxide hydrogel, diammonium hydrogen phosphate, lithium hydroxide and polyethylene glycol as raw materials; and roasting the precursor on the protection of an inert gas to ensure that V<+> is completely reduced into V<3+> and a product Li3V2(PO4)3 is generated. The rheological phase method has the characteristics of convenience, simpleness, easy control and low cost; and synthesis processes are simplified and charge and discharge properties and cycle performance of a sample are improved.
Owner:GUILIN UNIVERSITY OF TECHNOLOGY
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