CN102332566A - Low-sodium and low-potassium lithium manganate material for lithium ion battery anode and preparation method for lithium manganate material - Google Patents
Low-sodium and low-potassium lithium manganate material for lithium ion battery anode and preparation method for lithium manganate material Download PDFInfo
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- CN102332566A CN102332566A CN201110314423A CN201110314423A CN102332566A CN 102332566 A CN102332566 A CN 102332566A CN 201110314423 A CN201110314423 A CN 201110314423A CN 201110314423 A CN201110314423 A CN 201110314423A CN 102332566 A CN102332566 A CN 102332566A
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- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
Abstract
The invention discloses a low-sodium and low-potassium lithium manganate material for a lithium ion battery anode and a preparation method for the lithium manganate material. The lithium manganate material has a spherical shape, the average particle size of 5 to 30 micrometers, the tap density of 1.8 to 2.5g/m<3> and the specific surface area of 0.5 to 1.5m<2>/g, and each 1 kg of lithium manganate material comprises less than 15mg of Na and K ions and less than 10mg of impurities except the Na and K ions. The preparation method mainly comprises the following steps of: performing mechanical activation on a synthetic raw material, performing solid phase sintering on the activated material, sintering sulfur-containing gas to prepare manganese sulfate solution, purifying the manganese sulfate solution, and preparing high-purity manganese sulfate. The lithium manganate material has the characteristics that the manganese-based raw material source forms a closed cycle, energy is saved, emission is reduced and environment friendliness is achieved, and solves the problems that a raw material manganese compound has high impurity content, particularly a product difficultly reaches the standard stably because the Na and K ions are difficult to remove in the conventional solid phase sintering method; meanwhile, the defect that conditions such as solution pH, temperature, stirring rotating speed, reactant concentration and the like have rigorous matching requirements in the process of preparing a precursor by the conventional liquid phase precipitation method is overcome.
Description
Technical field:
The present invention relates to the anode material for lithium-ion batteries technical field, particularly a kind of lithium manganate material that is used for lithium ion cell positive and preparation method thereof.
Background technology:
Exploitation is to solve the energy-intensive important channel based on the new forms of energy power set of lithium battery, and along with the expansion of field of lithium battery application and the development of power vehicle, the anode material of lithium battery industry is just becoming the industry of most active and tool investment value; And wherein high-performance, low cost and eco-friendly LiMn2O4 are the positive electrodes of tool prospect; It has, and price is low to be held concurrently, and fail safe is good, and multiplying power discharging property is superior; Therefore advantages such as non-environmental-pollution are the heat subjects of studying both at home and abroad.At present preparation method's reported in literature of relevant LiMn2O4 is a lot, mainly contains two kinds of methods: (1) high temperature solid-phase sintering method, and under 500 ℃～900 ℃ temperature, divide 2 to 3 temperature sections to calcine generation in the mixture of lithium compound and manganese compound; (2) liquid phase synthesizing method is dissolved in lithium salts and manganese salt in the mixed solution of polynary organic monoacid and polyalcohol, through solation and gelation process and form gel precipitation, makes LiMn2O4 through the heat treatment gel precipitation again.Above-mentioned traditional liquid-phase precipitation method requires harsh in preparation presoma process to condition couplings such as the pH of solution, temperature, speed of agitator, reactant concentrations, still fail to drop into commercial production at present.The conventional high-temperature solid-phase sintering method is easy and simple to handle, has realized suitability for industrialized production, but LiMn2O4 that the conventional high-temperature solid-phase sintering method is processed and chemical stability thereof are all unresolved with long-term cyclical stability; Reason is that traditional solid-phase sintering method raw material manganese compound impurity content is high; Particularly Na, K ion are difficult to remove, out-of-shape, and particle size distribution is wide; Active low, can't the good LiMn2O4 product of processability.
Summary of the invention:
The purpose of this invention is to provide lithium manganate material of a kind of superior performance and preparation method thereof; High-leveled and difficult to overcome the impurities of materials content that prior art exists with stably reaching standard, or the condition couplings such as pH, temperature, speed of agitator, reactant concentration of solution require shortcoming such as harshness with not enough in the preparation presoma process.
Lithium cell anode material lithium manganate provided by the invention is spherical pattern, 5～30 microns of average grain diameters, tap density 1.8～2.5g/m
3, specific area 0.5～1.5m
2/ g, Na and K ion total content are less than 15mg/kg, and the impurity content except that Na and K is all less than 10mg/kg.
Lithium cell anode material lithium manganate provided by the invention, its preparation method mainly may further comprise the steps:
(1) mechanical activation; The high purity manganese sulfate of LITHIUM BATTERY is measured than after mixing according to the corresponding chemical of end product LiMn2O4 with the high purity lithium based compound; Add organic activator and in milling apparatus, grind, under the organic activator effect, make the full and uniform admixture activation of two solid phase powders;
(2) solid-phase sintering is sent the raw material behind the mechanical activation into calciner, and the control temperature is at 600 ℃～1200 ℃, and calcining is 1～5 hour under vacuum or nitrogen atmosphere, promptly prepares the lithium manganate material that is used for lithium ion cell positive;
(3) prepare manganese sulfate solution, the sulfurous gas of solid-phase sintering generation is drawn from calciner send into pyrolusite pulp sulfur dioxide absorption reactor thermally, produce manganese sulfate solution with the sulfur dioxide that pyrolusite pulp absorbs in the gas;
(4) manganese sulfate solution purification and impurity removal; In the manganese sulfate solution of processing to be clean, induce and generate hydroxyl radical free radical OH with strong oxidizing property; The manganese dioxide or the mangano-manganic oxide that generate nascent state with manganese ion reaction in hydroxyl radical free radical OH and the manganese sulfate solution are as the original position adsorbent; Impurity in the absorption manganese sulfate solution forms manganese oxides precipitate, and precipitate and separate is removed manganese oxides precipitate, obtains to satisfy LITHIUM BATTERY manganese based raw material and produces required high-purity sulphuric acid manganese solution;
(5) high purity manganese sulfate preparation; The high-purity sulphuric acid manganese solution that the high-temperature calcination gas that produces with step (2) solid-phase sintering is produced step (4) heats, concentrates, crystallization obtains high purity manganese sulfate, and the high purity manganese sulfate that makes is turned back to step (1) as the raw material of producing lithium manganate material.
In above-mentioned technology of preparing scheme, the solid-phase sintering preferred calcination temperature is 750 ℃～900 ℃; Said organic activator is preferentially selected the organic substance of alcohol, ketone and aldehyde for use; The addition of organic activator is preferably the scope of high purity manganese sulfate and high purity lithium based compound total weight 0.05～2.00%; The adding of organic activator can add in the mixing of high purity manganese sulfate and high purity lithium based compound, and also can in process of lapping, add; Potassium in said high purity manganese sulfate and the high purity lithium based compound crystal, the total content of sodium impurity elements are lower than 10mg/kg, and the total content of calcium, magnesium, iron, aluminium, cobalt, nickel, copper, zinc, lead, cadmium, arsenic, sila prime element is lower than 8mg/kg.
Anode material for lithium-ion batteries provided by the invention hangs down sodium potassium LiMn2O4 preparation method; Directly adopt high purity manganese sulfate and one step of lithium-based compound sintering to generate LiMn2O4; The high-temperature calcination gas that produces with solid-phase sintering is thermal source; The high-purity sulphuric acid manganese solution that the sulfur-bearing calcining gas that produces with solid-phase sintering is produced heats, concentrates, crystallization obtains as the high purity manganese sulfate that hangs down one of sodium potassium lithium manganate material synthesis material; Constitute closed cycle, energy-saving and emission-reduction, the eco-friendly process route of manganese based raw material, and technological process is brief.It is high that the present invention has overcome traditional solid sintering technology raw material manganese compound impurity content, and particularly Na, K ion are difficult to remove the problem that the product that brings is difficult to stably reaching standard.Avoid condition couplings such as pH that traditional liquid-phase precipitation method prepares solution in the presoma process, temperature, speed of agitator, reactant concentration simultaneously and required harsh drawback.
Description of drawings
Accompanying drawing 1 is a technological process schematic block diagram of the present invention.
Embodiment:
Specify the present invention through embodiment below.
Embodiment 1
High purity manganese sulfate and the pure Lithium Carbonate that will meet quality standard is organic activator according to the corresponding chemical metering of end product LiMn2O4 than the ethanol that adds high purity manganese sulfate and high purity lithium based compound total weight 1.00% after mixing again; In the ball mill machine, ground about 3 hours then; Raw material behind the mechanical activation is sent into calciner, feed nitrogen, the control temperature is at 850 ℃～900 ℃; Calcining is 5 hours under nitrogen atmosphere, generates satisfactory LiMn2O4 powder.To calcine the sulfurous gas that produces synchronously and draw the manganese sulfate solution that contains impurity with pyrolusite pulp absorption generation.Specifically the producing of manganese sulfate solution can adopt the authorized patented technology of patent applicant of the present invention to carry out that (ZH200510021926.X is the method that composite absorber carries out exhuast gas desulfurization with pyrolusite and pH buffer; ZH200910058061.2 is applicable to the reactor of leaching sulfur dioxide gas out of pyrolusite; ZH200910058062.7 prepares the method for manganese sulfate solution with leaching sulfur dioxide gas out of pyrolusite, and ZH200910060313.5 suppresses the method that manganous dithionate generates in the process of leaching sulfur dioxide gas out of pyrolusite).The manganese sulfate solution that contains impurity; Induce through physical method or chemical method and to generate hydroxyl radical free radical OH with strong oxidizing property; The manganese dioxide or the mangano-manganic oxide that generate nascent state with manganese ion reaction in hydroxyl radical free radical OH and the manganese sulfate solution are as the original position adsorbent; Impurity in the absorption manganese sulfate solution forms manganese oxides precipitate; Precipitate and separate is removed manganese oxides precipitate, obtains to satisfy LITHIUM BATTERY manganese based raw material and produces required high-purity sulphuric acid manganese solution (referring to " a kind of method of producing the high-purity sulphuric acid manganese solution " of filing an application on the same day with the present invention).The high-purity manganese sulphate soln using calcining high-temperature tail gas heating that obtains, concentrated, crystallization obtain to meet the high purity manganese sulfate that this method requires, Returning utilization once more.
Embodiment 2
High purity manganese sulfate and the High Purity Hydrogen lithia that will meet quality standard is organic activator according to the corresponding chemical metering of end product LiMn2O4 than the acetone that adds high purity manganese sulfate and high purity lithium based compound total weight 1.50% after mixing again; About 3.5 hours then in grinding in ball grinder; Raw material behind the mechanical activation is sent into calciner; The control temperature is at 750 ℃～850 ℃, and calcining is 4 hours under vacuum atmosphere, generates satisfactory LiMn2O4 powder.To calcine the sulfurous gas that produces synchronously and draw the manganese sulfate solution that contains impurity with pyrolusite pulp absorption generation.The producing of high impurity manganese sulfate solution, high impurity manganese sulfate solution purify produces the method that high-purity sulphuric acid manganese solution and high-purity sulphuric acid manganese solution are produced satisfactory high purity manganese sulfate, all same with embodiment 1.
Embodiment 3
High purity manganese sulfate and the High Purity Hydrogen lithia that will meet quality standard is organic activator according to the corresponding chemical metering of end product LiMn2O4 than the acetaldehyde that adds high purity manganese sulfate and high purity lithium based compound total weight 1.00% after mixing again; Then grinding in ball grinder 4 hours; Raw material behind the mechanical activation is sent into calciner; The control temperature is at 600 ℃～650 ℃, and calcining is about 4 hours under vacuum atmosphere, generates satisfactory LiMn2O4 powder.To calcine the sulfurous gas that produces synchronously and draw the manganese sulfate solution that contains impurity with pyrolusite pulp absorption generation.The producing of high impurity manganese sulfate solution, high impurity manganese sulfate solution purify produces the method that high-purity sulphuric acid manganese solution and high-purity sulphuric acid manganese solution are produced satisfactory high purity manganese sulfate, all same with embodiment 1.
Embodiment 4
High purity manganese sulfate and the High Purity Hydrogen lithia that will meet quality standard is organic activator according to the corresponding chemical metering of end product LiMn2O4 than the glycerine that adds high purity manganese sulfate and high purity lithium based compound total weight 2.00% after mixing again; Then grinding in ball grinder 5 hours; Raw material behind the mechanical activation is sent into calciner; The control temperature is at 1000 ℃～1200 ℃, and calcining is 4 hours under vacuum atmosphere, generates satisfactory LiMn2O4 powder.To calcine the sulfurous gas that produces synchronously and draw the manganese sulfate solution that contains impurity with pyrolusite pulp absorption generation.The producing of high impurity manganese sulfate solution, high impurity manganese sulfate solution purify produces the method that high-purity sulphuric acid manganese solution and high-purity sulphuric acid manganese solution are produced satisfactory high purity manganese sulfate, all same with embodiment 1.
Claims (7)
1. low sodium potassium lithium manganate material that is used for lithium ion cell positive, it is characterized in that: the pattern of lithium manganate material is spherical, 5～30 microns of average grain diameters, tap density 1.8～2.5g/m
3, specific area 0.5～1.5m
2/ g, Na and K ion total weight content are less than 15mg/kg, and the impurity weight content beyond Na and the K is all less than 10mg/kg.
2. the preparation method of the said low sodium potassium lithium manganate material of claim 1 is characterized in that mainly may further comprise the steps:
(1) mechanical activation; The high purity manganese sulfate of LITHIUM BATTERY is measured than after mixing according to the corresponding chemical of end product LiMn2O4 with the high purity lithium based compound; Add organic activator and in milling apparatus, grind, under the organic activator effect, make the full and uniform admixture activation of two solid phase powders;
(2) solid-phase sintering is sent the raw material behind the mechanical activation into calciner, and the control temperature is at 600 ℃～1200 ℃, and calcining is 1～5 hour under vacuum or nitrogen atmosphere, promptly prepares the lithium manganate material that is used for lithium ion cell positive;
(3) prepare manganese sulfate solution, the sulfurous gas of solid-phase sintering generation is drawn from calciner send into pyrolusite pulp sulfur dioxide absorption reactor thermally, produce manganese sulfate solution with the sulfur dioxide that pyrolusite pulp absorbs in the gas;
(4) manganese sulfate solution purification and impurity removal; In the manganese sulfate solution of processing to be clean, induce and generate hydroxyl radical free radical OH with strong oxidizing property; The manganese dioxide or the mangano-manganic oxide that generate nascent state with manganese ion reaction in hydroxyl radical free radical OH and the manganese sulfate solution are as the original position adsorbent; Impurity in the absorption manganese sulfate solution forms manganese oxides precipitate, and precipitate and separate is removed manganese oxides precipitate, obtains to satisfy LITHIUM BATTERY manganese based raw material and produces required high-purity sulphuric acid manganese solution;
(5) high purity manganese sulfate preparation; The high-purity sulphuric acid manganese solution that the high-temperature calcination gas that produces with step (2) solid-phase sintering is produced step (4) heats, concentrates, crystallization obtains high purity manganese sulfate, and the high purity manganese sulfate that makes is turned back to step (1) as the raw material of producing lithium manganate material.
3. low sodium potassium lithium manganate material preparation method according to claim 2, the calcining heat that it is characterized in that solid-phase sintering is 750 ℃～900 ℃.
4. according to claim 2 or 3 described low sodium potassium lithium manganate material preparation methods, it is characterized in that said organic activator is the organic substance that is selected from alcohol, ketone and aldehyde.
5. low sodium potassium lithium manganate material preparation method according to claim 4 is characterized in that said organic activator addition is 0.05～2.00% of high purity manganese sulfate and a high purity lithium based compound total weight.
6. according to claim 2 or 3 described low sodium potassium lithium manganate material preparation methods; It is characterized in that the potassium in said high purity manganese sulfate and the high purity lithium based compound crystal, the total content of sodium impurity elements are lower than 10mg/kg,, the total content of calcium, magnesium, iron, aluminium, cobalt, nickel, copper, zinc, lead, cadmium, arsenic, sila prime element is lower than 8mg/kg.
7. low sodium potassium lithium manganate material preparation method according to claim 5; It is characterized in that the potassium in said high purity manganese sulfate and the high purity lithium based compound crystal, the content of sodium impurity elements are lower than 10mg/kg, the total content of calcium, magnesium, iron, aluminium, cobalt, nickel, copper, zinc, lead, cadmium, arsenic, sila prime element is lower than 8mg/kg.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108063247A (en) * | 2017-12-23 | 2018-05-22 | 清远佳致新材料研究院有限公司 | A kind of method that compound manganese ore prepares manganate cathode material for lithium |
| CN109256595A (en) * | 2018-08-06 | 2019-01-22 | 株洲冶炼集团股份有限公司 | A kind of method that the useless powder pyrogenic method directly reparation of LiFePO4 prepares battery-grade iron phosphate lithium |
| CN109911946A (en) * | 2017-12-13 | 2019-06-21 | 中国科学院过程工程研究所 | The method of saggar recovery processing is discarded in a kind of cobalt acid lithium battery material preparation process |
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| CN101456597A (en) * | 2009-01-08 | 2009-06-17 | 四川大学 | Method for preparing manganese sulfate solution by using sulphur dioxide gas leach manganese dioxide ore |
| CN101764233A (en) * | 2009-11-13 | 2010-06-30 | 山东东岳高分子材料有限公司 | Cross-linking perfluorinated sulfonic acid ion exchange membrane and preparation method thereof |
| CN101786666A (en) * | 2010-02-10 | 2010-07-28 | 彭天剑 | High-purity manganese dioxide and preparation method thereof as well as lithium manganese oxide anode material and preparation method thereof |
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- 2011-10-17 CN CN201110314423A patent/CN102332566A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101456597A (en) * | 2009-01-08 | 2009-06-17 | 四川大学 | Method for preparing manganese sulfate solution by using sulphur dioxide gas leach manganese dioxide ore |
| CN101764233A (en) * | 2009-11-13 | 2010-06-30 | 山东东岳高分子材料有限公司 | Cross-linking perfluorinated sulfonic acid ion exchange membrane and preparation method thereof |
| CN101786666A (en) * | 2010-02-10 | 2010-07-28 | 彭天剑 | High-purity manganese dioxide and preparation method thereof as well as lithium manganese oxide anode material and preparation method thereof |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109911946A (en) * | 2017-12-13 | 2019-06-21 | 中国科学院过程工程研究所 | The method of saggar recovery processing is discarded in a kind of cobalt acid lithium battery material preparation process |
| CN108063247A (en) * | 2017-12-23 | 2018-05-22 | 清远佳致新材料研究院有限公司 | A kind of method that compound manganese ore prepares manganate cathode material for lithium |
| CN109256595A (en) * | 2018-08-06 | 2019-01-22 | 株洲冶炼集团股份有限公司 | A kind of method that the useless powder pyrogenic method directly reparation of LiFePO4 prepares battery-grade iron phosphate lithium |
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