887results about "Lithium compounds" patented technology

A method for the synthesis of compounds of the formula C-LixM1-yM'y(XO4)n, where C represents carbon cross-linked with the compound LixM1-yM'y(XO4)n, in which x, y and n are numbers such as 0<=x<=2, 0<=y<=0.6, and 1<=n<=1.5, M is a transition metal or a mixture of transition metals from the first period of the periodic table, M' is an element with fixed valency selected among Mg<2+>, Ca<2+>, Al<3+>, Zn<2+> or a combination of these same elements and X is chosen among S, P and Si, by bringing into equilibrium, in the required proportions, the mixture of precursors, with a gaseous atmosphere, the synthesis taking place by reaction and bringing into equilibrium, in the required proportions, the mixture of the precursors, the procedure comprising at least one pyrolysis step of the carbon source compound in such a way as to obtain a compound in which the electronic conductivity measured on a sample of powder compressed at a pressure of 3750 Kg.cm<-2 >is greater than 10<-8 >S.cm<-1>. The materials obtained have excellent electrical conductivity, as well a very improved chemical activity.

Disclosed herein is a cathode active material coated with a fluorine compound for lithium secondary batteries. The cathode active material is structurally stable, and improves the charge-discharge characteristics, cycle characteristics, high-voltage characteristics, high-rate characteristics and thermal stability of batteries.

The invention relates to binary, ternary and quaternary lithium phosphates of general formula Li(FexM<1>yM<2>z)PO4 wherein M<1 >represents at least one element of the group comprising Sc, Ti, V, Cr, Mn, Co, Ni, Cu, Zn, Be, Mg, Ca, Sr, Ba, Al, Zr, and La; M<2 >represents at least one element of the group comprising Sc, Ti, V, Cr, Mn, Co, Ni, Cu, Zn, Be, Mg, Ca, Sr, Ba, Al, Zr, and La; x=between 0.5 and 1, y=between 0 and 0.5, z=between 0 and 0.5, provided that x+y+z=1, or x=0, y =1 and z=0. The said lithium phosphates can be obtained according to a method whereby precursor compounds of elements Li, Fe, M<1 >and/or M<2 >are precipitated from aqueous solutions and the precipitation product is dried in an inert gas atmosphere or a reducing atmosphere at a temperature which is between room temperature and approximately 200° C. and tempered at a temperature of between 300° C. and 1000° C. The inventive lithium phosphates have a very high capacity when used as cathode material in lithium accumulators.

Methods and systems for processing metal oxides from metal containing solutions. Metal containing solutions are mixed with heated aqueous oxidizing solutions and processed in a continuous process reactor or batch processing system. Combinations of temperature, pressure, molarity, Eh value, and pH value of the mixed solution are monitored and adjusted so as to maintain solution conditions within a desired stability area during processing. This results in metal oxides having high or increased pollutant loading capacities and/or oxidation states. These metal oxides may be processed according to the invention to produce co-precipitated oxides of two or more metals, metal oxides incorporating foreign cations, metal oxides precipitated on active and inactive substrates, or combinations of any or all of these forms. Metal oxides thus produced are, amongst other uses; suitable for use as a sorbent for capturing or removing target pollutants from industrial gas streams or drinking water or aqueous streams or for personal protective respirators.

A lithium metal oxide positive electrode material useful in making lithium-ion batteries that is produced using spray pyrolysis. The material comprises a plurality of metal oxide secondary particles that comprise metal oxide primary particles, wherein the primary particles have a size that is in the range of about 1 nm to about 10 μm, and the secondary particles have a size that is in the range of about 10 nm to about 100 μm and are uniformly mesoporous.

This invention discloses the method for preparing high-density spherical lithium ferric phosphate used as the positive material of lithium ion cell, which contains synthesizing the ferric iron salt aqueous solution, phosphorus source aqueous solution and alkali aqueous solution to form spherical or spheroid ferric phosphate precursor, uniformly mixed with lithium source, carbon source and doped metal compound after being washed and dried, high temperature heat treating at 600-900 degree centigrade for 8-48 hr under inertia or reducing atmosphere protection to obtain lithium ferric phosphate with mean grain size of 7-12 micrometer,2.0-2.2g/cm3 of tap density, high buck density of 140-155mAh/g first discharge ratio capacity at normal temperature, and high volume ratio capacity.

The invention generally relates to methods of selectively removing lithium from various liquids, methods of producing high purity lithium carbonate, methods of producing high purity lithium hydroxide, and methods of regenerating resin.

Composite compounds of tin and lithium, silicon and lithium, or tin, silicon, and lithium having tin and silicon nano-dispersed in a lithium-containing matrix may be used as electrode materials and particularly anode materials for use with rechargeable batteries. Methods of making the composite compounds include the oxidation of alloys, the reaction of stabilized lithium metal powder with tin and silicon oxides, and the reaction of inorganic salts of lithium with tin and silicon containing compounds.

The invention relates to a method for recovering and preparing lithium cobalt oxide by using a disused lithium battery, belonging to the technical field of recovery and recycle of electrode materials.The method comprises the steps of: discharging, disassembling, smashing, NMP processing and burning a disused lithium battery sequentially, to obtain a disused LiCoO2 material; ball-milling the disused LiCoO2 material and adding natural organic acid and hydrogen peroxide to obtain a solution of Li<+> and Co<2+>; adding lithium salt or cobalt salt after filtering, and then heating by water bath; dropwise adding ammonia water in the solution to prepare a xerogel; and performing secondary burning to obtain an electrode material of lithium cobalt oxide. The method has the advantages that the electrochemical properties of the electrode material of the disused lithium battery can be recycled with obvious effect as well as simple and easy operation; the natural organic acid used in the process of acid dipping has small damage to apparatus; and the method is environment friendly and efficient, and has low cost, simple technique, high recovery rate and industrialized promotion.

The invention provides a method for extracting lithium salts in lithium-containing brine. Lithium is extracted through a co-extraction agent, an extraction agent and a diluent, wherein the extract is a mixture of an amide compound and a neutral phosphorus oxide compound, the structural formula of the amide compound is shown in the specification, and the structural formula of the neutral phosphorus oxide compound is shown in the specification. The method provided by the invention further optimizes the properties of extracted lithium, so that the method is more applicable to the industrial application.

The nanofiltration process is suitable for Mg-Li separation and Li enriching of Li containing bittern or Li containing solution from salt lake to prepare lithium carbonate or lithium chloride with the Li enriching bittern. Nanofiltration membrane is used in separating and enriching lithium from lithium containing bittern, which contains Mg, Ca and other cations and sulfate radical and other anions and has Li ion concentration of 0.1-11.5 g/L and Mg/Li ion weight ratio 1-200, to obtain lithium enriched bittern suitable for preparing lithium carbonate or lithium chloride. The said process is effective, and can obtain lithium enriched bittern with Mg/Li ion weight ratio 0.6-5 and Li ion content of 0.6-20 g/L.

Disclosed is a positive active material for a rechargeable lithium battery. The positive active material includes at least one compound represented by formulas 1 to 4 andl a metal oxide or composite metal oxide layer formed on the compound. <table-cwu id="TABLE-US-00001"> <number>1</number> <tgroup align="left" colsep="0" rowsep="0" cols="3"> <colspec colname="OFFSET" colwidth="42PT" align="left"/> <colspec colname="1" colwidth="77PT" align="left"/> <colspec colname="2" colwidth="98PT" align="center"/> <row> <entry></entry> <entry></entry> </row> <row> <entry></entry> <entry namest="OFFSET" nameend="2" align="center" rowsep="1"></entry> </row> <row> <entry></entry> <entry>LixNi1-yMnyF2</entry> <entry>(1)</entry> </row> <row> <entry></entry> <entry>LixNi1-yMnyS2</entry> <entry>(2)</entry> </row> <row> <entry></entry> <entry>LixNi1-y-zMnyMzO2-aFa</entry> <entry>(3)</entry> </row> <row> <entry></entry> <entry>LixNi1-y-zMnyMzO2-aSa</entry> <entry>(4)</entry> </row> <row> <entry></entry> <entry namest="OFFSET" nameend="2" align="center" rowsep="1"></entry> </row> </tgroup> </table-cwu> (where M is selected from the group consisting of Co, Mg, Fe, Sr, Ti, B, Si, Ga, Al, Sc, Y, La, Ce, Pr, Nd, Pm, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, Lu, Ac, Th, Pa, U, Np, IPu, Am, Cm, Bk, Cf, Es, Fm, Md, No and Lr, 0.95<=x<=1.1, 0<=y<=0.99, 0<=,z<=0.5, and 0<=a<=0.5)

The invention discloses a preparation method of a spherical doped Al-Ni lithium cobalt oxide for lithium-ion battery. The preparation steps are that: first, sulfate, nitrate or chlorate of Al-Ni-Co react with strong alkali that is added with complex agent in liquid phase; the pH value, the temperature and the feeding speed of the reaction solution are controlled so as to produce a spherical precursor of Al-Ni-Co hydroxide; then the spherical precursor of Al-Ni-Co hydroxide is dried and evenly mixed with lithium hydroxide, lithium nitrate or lithium carbonate and dried; the obtained mixture is roasted into a spherical doped Al-Ni lithium cobalt oxide. The spherical doped Al-Ni lithium cobalt oxide has comparatively high tap density and remarkable cycle stability in the process of high-rate charge/discharge cycle, which improves over charge performance of Ni-Co substance and first obviously enhances charge/discharge efficiency; in addition, the preparation method of the spherical doped Al-Ni lithium cobalt oxide has the advantages of being simple, controllable and suitable for industrialized production with low energy consumption, high efficiency, short reaction time and low cost.

The present disclosure sets forth battery components for secondary and/or traction batteries. Described herein are new solid-state lithium (Li) conducting electrolytes including monolithic, single layer, and bi-layer solid-state sulfide-based lithium ion (Li⁺) conducting catholytes or electrolytes. These solid-state ion conductors have particular chemical compositions which are arranged and/or bonded through both crystalline and amorphous bonds. Also provided herein are methods of making these solid-state sulfide-based lithium ion conductors including new annealing methods. These ion conductors are useful, for example, as membrane separators in rechargeable batteries.

The invention provides a method for extracting lithium salts in lithium-containing brine through an extraction method. Lithium is extracted through a co-extraction agent, an extraction agent and a diluent, wherein the extract is a mixture of an amide compound and a neutral phosphorus oxide compound, the structural formula of the amide compound is shown in the specification, and the structural formula of the neutral phosphorus oxide compound is shown in the specification. The method provided by the invention further optimizes the properties of extracted lithium, so that the method is more applicable to industrial application.

This invention relates to a method for preparing a lithium aluminate intercalate (LAI) matrix solid and methods for the selective extraction and recovery of lithium from lithium containing solutions, including brines. The method for preparing the LAI matrix solid includes reacting aluminum hydroxide and a lithium salt for form the lithium aluminate intercalate, which can then be mixed with up to about 20% by weight of a polymer to form the LAI matrix.

The invention relates to a high-density lithium cobalt oxide power material with a super-large grain diameter. The method comprises the steps of mixing a cobalt compound, a lithium compound or meanwhile a small amount of doping element compounds; sintering for 3 to 30 hours at the high temperature of 950 to 1,100 DEG C to form a block sintered product; crushing and grading the product to obtain the lithium cobalt oxide power material (molecular formula is LiaCo1-bMbO2), wherein, when b is not equal to 0, the middle diameter of the lithium cobalt oxide containing the doping elements is larger than or equal to 15 Mum, and the tap density is higher than or equal to 2.5g/cm<3>; when b is equal to 0, the middle diameter of the lithium cobalt oxide without the doping elements is larger than 20 Mum, and the tap density is higher than or equal to 2.6g/cm<3>. the 3.6V platform capacity rate of the material as the anode active substance for a lithium battery is higher than or equal to 75%; in the thermal impact test in a 150 DEG C thermotank, the lithium battery with the material is free from leakage and does not catch fire or explode for 60 minutes; the 1C5A specific capacity of the material in the battery is larger than or equal to 135mAh/g.

The invention provides a method for using microwave method to produce LiFePO4 material, the character lies in: it uses microwave synthesis technology, uses the active carbon as the heating material for microwave receptor, thus the LiFePO4 material can be acquired. The process is: the Li2CO3 and FeC2O4íñ2H2O, (NH4) 2HPO4 are confected according to the resultant's proportion, they are put into the agate ball milling pot, uses the acetone as dispersant to ball grind for 4-12 hours, the mixed material are dried and pressed into pieces, and put into the aluminum crucible containing the active carbon and thermal retardation material, then the crucible is put into the household microwave stove, the frequency is 2.45GHz, the power is adjusted to the lower gear-middle gear, the time is 3-30 minutes, the synthesized product can be acquired. The merits of the invention lie in: the heating process is quick, the synthesizing time is short, and it prevents the crystal particle from growing; the energy consumption can be reduced.

This invention discloses a high-density ball ferric phosphate lithium and manganous phosphate iron lithium process method used in lithium ion battery positive electrode material in energy material process technique field. The process method comprises the following steps: to use ferric persulfate, phosphor or complex builder or manganese sulfate to process the mixture liquid; to react with the hartshorn solution to generate ball ferrous phosphate ammonium or manganese phosphate ferrous front driver; to mix it with lithium carbonate with mole proportion of one to one after washing and drying; under protection of nitrogen gas and after 600 to 900 degrees for 8 to 48 hours to get the ferric phosphate lithium or manganese phosphate ferrous.

The present invention provides a lithium-containing composite oxide for a positive electrode for a lithium secondary battery, which has a large volume capacity density and high safety, and excellent durability for charge and discharge cycles and charge and discharge rate property, and its production method.

The lithium-containing composite oxide is represented by the general formula Li_pN_xM_yO_zF_a (where N is at least one element selected from the group consisting of Co, Mn and Ni, M is at least one element selected from the group consisting of Al, Sn, alkaline earth metal elements and transition metal elements other than Co, Mn and Ni, 0.9≦p≦1.2, 0.965≦x<2.00, 0<y≦0.035, 1.9≦z≦4.2, and 0≦a≦0.05), wherein when a powder of the lithium-containing composite oxide is classified into small particles with an average particle size of 2 μm≦Ds₅₀≦8 μm and large particles with an average particle size of 10 μm≦Dl₅₀≦25 μm, a content of the small particles is from 15 to 40% by weight and a content of the large particles is from 60 to 85% by weight, and 0.01≦ys≦0.06, 0≦yl≦0.02 and 0≦yl/ys<1, where (ys) is a ratio of the M element in the above general formula in the small particles and (yl) is a ratio of the M element in the general formula in the Large particles.

Disclosed is a method for preparing a lithium-metal composite oxide, the method comprising the steps of: (a) mixing an aqueous solution of one or more transition metal-containing precursor compounds with an alkalifying agent and a lithium precursor compound to precipitate hydroxides of the transition metals; (b) mixing the mixture of step (a) with water under supercritical or subcritical conditions to synthesize a lithium-metal composite oxide, and drying the lithium-metal composite oxide; and (c) subjecting the dried lithium-metal composite oxide either to calcination or to granulation and then calcination. Also disclosed are an electrode comprising the lithium-metal composite oxide, and an electrochemical device comprising the electrode. In the disclosed invention, a lithium-metal composite oxide synthesized based on the prior supercritical hydrothermal synthesis method is subjected either to calcination or to granulation and then calcination. Thus, unlike the prior dry calcination method or wet precipitation method, a uniform solid solution can be formed and the ordering of metals in the composite oxide can be improved. Accordingly, the lithium-metal composite oxide can show crystal stability and excellent electrochemical properties.