CN108069459A - A kind of LiMn2O4 mangano-manganic oxide and its industrial production process - Google Patents
A kind of LiMn2O4 mangano-manganic oxide and its industrial production process Download PDFInfo
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- C01G45/1242—Manganates or manganites with a manganese oxidation state of Mn(III), Mn(IV) or mixtures thereof of the type [Mn2O4]-, e.g. LiMn2O4, Li[MxMn2-x]O4
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- H01M4/505—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of manganese of mixed oxides or hydroxides containing manganese for inserting or intercalating light metals, e.g. LiMn2O4 or LiMn2OxFy
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Abstract
The invention discloses a kind of LiMn2O4 mangano-manganic oxide and its industrial production process, this method includes will be after high pure metal manganese powder dry milling to 5 μm of 50 μm of grain sizes, input has been added in the reactor of pure water and ammonium salt, blowing air aoxidizes, reaction temperature is controlled at 70 ± 20 DEG C, mixing speed is 300~450r/min, is passed through air mass flow as 100 300m3/ h, reaction to 8 20 it is small when after add in adhesion promoter continue stirring 0.5 1 it is small when, then soluble manganese salt is added in, is sufficiently stirred, adds aqueous slkali, pH value is controlled 10 13, the reaction was continued 35 hours terminates to reaction, then washed, and mangano-manganic oxide product is obtained after dry, the LiMn2O4 that the mangano-manganic oxide made from the above method synthesizes can avoid the generation of caking phenomenon, and LiMn2O4 is made to maintain higher compacted density.
Description
Technical field
The invention belongs to anode material of lithium battery preparing technical field, more particularly to a kind of LiMn2O4 mangano-manganic oxide
And its industrial production process.
Background technology
LiMn2O4 (LiMn2O4) with its abundant raw material, good cost performance, the good feature of environmental protection and security performance,
Major anode material of lithium battery price all high today, its exclusive advantage is gradually shown.
Although current domestic industry production LiMn2O4 (LiMn2O4) main still using electrolytic manganese dioxide (EMD) as manganese
Source, but constantly there is new research (to keep refined, Wu Xianming, Chen Shang, Liu Zhixiong, fourth its morning mangano-manganic oxides see document one is old
Spinel lithium manganate and Electrochemical Properties are prepared, [J] application chemical industry, 2015,44 (10):1791-1795.；Two Qin of document
Big, Wei Hua is sweet eternally happy, Wen Yanxuan, and the Study of optimization of grain sea cutting edge of a knife or a sword lithium carbonates and mangano-manganic oxide synthetic lithium manganate is inorganic
Salt industrial, [J] inorganic chemicals industries, 2009,41 (4):15-17.) show with mangano-manganic oxide (Mn3O4) instead of EMD prepare mangaic acid
Lithium has apparent advantage compared to synthetic lithium manganate is carried out using EMD as manganese source.The manganese synthesized using mangano-manganic oxide as manganese source
Sour lithium electrical property has compared with EMD as the LiMn2O4 that manganese source synthesizes in terms of the electrical properties such as capacity, multiplying power, cycle life substantially to be carried
It is high.But it is compared using mangano-manganic oxide as manganese source synthetic lithium manganate using EMD as manganese source also synthetic lithium manganate in industrial production
On there is also one by question of common concern in the industry, be exactly compared to EMD, mangano-manganic oxide synthetic lithium manganate, it is easier to lead
Caking is caused, so as to need to increase broken process in the industrial production.Entire LiMn2O4 production technology can be increased by increasing broken process
Complexity, also improve cost.Crushing process improves the energy consumption of entire production technology, while in shattering process inevitably
A certain amount of fine powder can be produced, industry generally reflects that crushed product yield is 95% or so, causes to waste.
Also there is patent ZL201380052160.4 to mention and using these lithium manganese systems composite oxides of mangano-manganic oxide
It is easy to generate so-called necking in the manufacturing method of (such as LiMn2O4), that is, the welding phenomenon between particle in calcining, by
In necking, with the grain size for the lithium manganese systems composite oxides that these manufacturing methods obtain, grain shape is uneven, in order to will not
Uniform lithium manganese systems composite oxides are made as uniform, it is necessary to which the lithium manganese systems composite oxides after calcining are crushed or crushed；
The few lithium manganese systems composite oxides of the welding phenomenon that can be made up of process between the particle as caused by calcining (such as manganese
Sour lithium LiMn2O4), but after LiMn2O4 is made in the mangano-manganic oxide being prepared, compacted density is relatively low, in its 9 embodiments and
In 2 comparative examples, highest compacted density is only 2.8g/cm3, generally believe that the compacted density of LiMn2O4 should be in the industry at present
3.0g/cm3More than, and positive electrode compacted density is to influence an important indicator of lithium battery energy density.
The content of the invention
It is an object of the present invention in view of the above-mentioned problems, provide a kind of LiMn2O4 mangano-manganic oxide and its industrially prepared
Method, this method have following features：
1) mangano-manganic oxide that the method is produced during high temperature solid-state method synthetic lithium manganate for can avoid caking phenomenon
It generates, that is, need not be crushed after the completion of being sintered, it is only necessary to it is simply sieved and can obtain qualified LiMn2O4 product,
Therefore, the broken process of current mangano-manganic oxide synthetic lithium manganate technique is eliminated, so as to reduce mangano-manganic oxide synthesis mangaic acid
Lithium production cost；
2) mangano-manganic oxide that the method is produced maintains higher compacted density as the LiMn2O4 that manganese source synthesizes：≥
3.0g/cm3。
To achieve the above object, the technical solution adopted by the present invention is as follows：
The present invention relates to a kind of preparation methods of mangano-manganic oxide, which is characterized in that this method includes：By high pure metal manganese
After powder dry milling to 5 μm of -50 μm of grain sizes, input has been added in the reactor of pure water and ammonium salt, blowing air oxidation, reaction temperature
At 70 ± 20 DEG C, mixing speed is 300~450r/min for degree control, is passed through air mass flow as 100-300m3/ h, reaction 8-20 are small
When after add in adhesion promoter continue to stir 0.5-1 it is small when, then add in soluble manganese salt, be sufficiently stirred, add aqueous slkali,
In 10-13, the reaction was continued 3-5 hour terminates to reaction, then washed, and mangano-manganic oxide product is obtained after drying for pH value control.
More specifically, the ammonium salt is the one or more in ammonium chloride, ammonium sulfate, ammonium nitrate, and ammonium salt addition is
The 1%-10% of manganese powder quality is preferably 1%-8%, is preferably 1%-5%, more preferably 1.5%-3%.
The adhesion promoter is sodium n-alkylbenzenesulfonate, sodium sulfate of polyethenoxy ether of fatty alcohol, fatty alcohol polyoxy
Ethylene ether ammonium sulfate, sldium lauryl sulfate, lauroyl glutamate, nonylphenol polyoxyethylene ether, diglycollic amide, two rings are
Amine, glycerol stearate monoesters, dimethyl acetamide, 12 for sodium alkyl sulfate, tetra- sodium of EDTA, ethylene glycol, n-butanol, carboxylic acid first
One or more in base sodium cellulosate, adhesion promoter addition are the 0.1%-10% of manganese powder quality, are preferably
0.1%-8% is preferably 0.1%-6%, is preferably 0.1%-4%, more preferably 0.1%-2%, more preferably 0.1%-
1%.
The soluble manganese salt is manganese chloride, manganese sulfate, the one or more in manganese nitrate, and soluble manganese salt adds in
It measures as the 30%-60% of manganese powder quality, preferably 35%-55%, more preferably 40%-50%.
The aqueous slkali is NaOH, KOH, the one or more in ammonium hydroxide.
Further, the invention further relates to mangano-manganic oxides prepared by any of the above-described the method.
Preferably, the BET specific surface area of mangano-manganic oxide prepared by any of the above-described the method is 5-7m2/g。
Further, the invention further relates to a kind of LiMn2O4, the mangano-manganic oxide prepared by any of the above-described the method
It is synthesized with lithium compound.Wherein, the lithium compound for can with the lithium salts of mangano-manganic oxide synthetic lithium manganate, it is excellent
Elect the one or more in lithium carbonate, lithia, lithium hydroxide as；The preferred high temperature solid-state method of synthetic method.
Moreover, it relates to LiMn2O4 prepared by any of the above-described the method is preparing lithium ion cell positive material
Application in material.
The present invention is using electrolytic manganese metal as the highdensity mangano-manganic oxide core of Material synthesis to ensure the pressure of final products
Real density is in 3.0g/cm3More than, then aoxidized on the core with solvable manganese salt and aqueous slkali coprecipitation generation high-ratio surface four
Three manganese layers with ensure final products have higher specific surface.The mangano-manganic oxide obvious characteristic that the method is produced is to be made with it
It is manganese source so that the generation of welding phenomenon can be avoided during high temperature solid-state method synthetic lithium manganate, while the compacting for keeping LiMn2O4 higher is close
Degree.
Inventor also found, the welding when volume size of mangano-manganic oxide surface pores directly affects high temperature solid state reaction
Whether the generation of phenomenon, the volume size of the surface pores of the mangano-manganic oxide obtained in the method referred in this patent can be used
BET specific surface area is characterized, BET 5-7m2During/g, prevent that the effect that welding is generated between particle is best.
Description of the drawings
The present invention is further described below in conjunction with the accompanying drawings.
Fig. 1 is the scanning electron microscope (SEM) photograph of the mangano-manganic oxide obtained by embodiment 1；
Fig. 2 is the scanning electron microscope (SEM) photograph of the LiMn2O4 obtained by embodiment 1；
Fig. 3 is the scanning electron microscope (SEM) photograph of the mangano-manganic oxide obtained by embodiment 2；
Fig. 4 is the scanning electron microscope (SEM) photograph of the LiMn2O4 obtained by embodiment 2；
Fig. 5 is the scanning electron microscope (SEM) photograph of the mangano-manganic oxide obtained by embodiment 3；
Fig. 6 is the scanning electron microscope (SEM) photograph of the LiMn2O4 obtained by embodiment 3.
The LiMn2O4 sample particle of Fig. 2,4,6 that mangano-manganic oxide sample shown in Fig. 1,3,5 obtains after sintering is clear, not
Generation welding adhesion can obtain qualified products without broken.
Specific embodiment
With reference to embodiment, the present invention is further described.
Embodiment 1
By high pure metal manganese powder dry milling to 10 μm of median, 50 μm or more particles are removed through air current classifying, are taken
More than manganese powder 1000kg inputs have added in 4m3Blowing air oxidation simultaneously in the reactor of pure water and 15kg ammonium sulfate.Reaction temperature
Control is at 70 ± 20 DEG C, and air flow control is in 250m3/ h, mixing speed control is in 300r/min, after reacting 20h, addition 8kg
Sldium lauryl sulfate adds in 500kg manganese chlorides after being sufficiently stirred 30 minutes, metering pump addition 20%NaOH is molten after stirring 10min
Liquid adjust pH to 10 the reaction was continued 5 it is small when, after reaction slurry by sheet frame wash, with spray drying dry after obtain four oxygen
Change three manganese products 1.
By mangano-manganic oxide 1 and lithium carbonate, calcining 10 is small at 900 DEG C after Li/Mn=0.55 is sufficiently mixed in molar ratio again
When obtain LiMn2O4 1.
Mangano-manganic oxide product median made from the method is 10.1um, BET specific surface area 5.21m2/g.It is obtained
1 performance of LiMn2O4 is shown in Table 1.
Embodiment 2
By high pure metal manganese powder dry milling to 20 μm of median, 70 μm or more particles are removed through air current classifying, are taken
More than manganese powder 1000kg inputs have added in 4m3Blowing air oxidation simultaneously in the reactor of pure water and 15kg ammonium chlorides.Reaction temperature
Control is at 70 ± 20 DEG C, and air flow control is in 150m3/ h, mixing speed control is in 350r/min, after reacting 8h, addition 2kg
Tetra- sodium of sldium lauryl sulfate and 5kgEDTA adds in 500kg manganese chlorides after being sufficiently stirred 30 minutes, metering pump adds after stirring 10min
Enter 20%NaOH solution adjust pH to 12 the reaction was continued 4 it is small when, after reaction slurry by sheet frame wash, with spray drying do
Mangano-manganic oxide product 2 is obtained after dry.It is synthesized according to the identical method mangano-manganic oxide 2 of embodiment 1 instead of mangano-manganic oxide 1
LiMn2O4 2.
Mangano-manganic oxide product median made from the method is 9.9um, BET specific surface area 5.87m2/g.It is obtained
2 performance of LiMn2O4 is shown in Table 1.
Embodiment 3
By high pure metal manganese powder dry milling to 30 μm of median, 80 μm or more particles are removed through air current classifying, are taken
More than manganese powder 1000kg inputs have added in 4m3Blowing air oxidation simultaneously in the reactor of pure water and 15kg ammonium sulfate.Reaction temperature
Control is at 70 ± 20 DEG C, and air flow control is in 250m3/ h, mixing speed control is in 300r/min, after reacting 15h, addition 2kg
Tetra- sodium of sldium lauryl sulfate and 5kgEDTA adds in 500kg manganese chlorides after being sufficiently stirred 30 minutes, metering pump adds after stirring 10min
Enter 20%NaOH solution adjust pH to 13 the reaction was continued 3 it is small when, after reaction slurry by sheet frame wash, with spray drying do
Mangano-manganic oxide product 3 is obtained after dry.It is synthesized according to the identical method mangano-manganic oxide 3 of embodiment 1 instead of mangano-manganic oxide 1
LiMn2O4 3.
Mangano-manganic oxide product median made from the method is 10.3um, BET specific surface area 6.82m2/g.It is obtained
3 performance of LiMn2O4 is shown in Table 1.
The performance of 1 LiMn2O4 1~3 of table
| Performance | LiMn2O4 1 | LiMn2O4 2 | LiMn2O4 3 |
| With the presence or absence of welding phenomenon | It is no | It is no | It is no |
| Compacted density | 3.11 | 3.10 | 3.06 |
As it can be seen from table 1 mangaic acid is synthesized in high temperature solid-state method with mangano-manganic oxide made of method provided by the invention
The generation of welding phenomenon between particle can be prevented during lithium well, and LiMn2O4 of its synthesis has good compacted density.
More than content is only to examples of the invention and explanation, and affiliated those skilled in the art are to being retouched
Various modifications may be made or supplement for the specific embodiment stated, and design without departing from the present invention or surmounts the claims and is defined
Scope, be within the scope of protection of the invention.
Claims (10)
1. a kind of preparation method of mangano-manganic oxide, which is characterized in that this method includes：By high pure metal manganese powder dry milling
To 5 μm of -50 μm of grain sizes, input has been added in the reactor of pure water and ammonium salt, blowing air oxidation, reaction temperature control 70 ±
20 DEG C, mixing speed is 300~450r/min, is passed through air mass flow as 100-300m3/ h, reaction 8-20 it is small when after add in attachment
Accelerating agent continue to stir 0.5-1 it is small when, then add in soluble manganese salt, be sufficiently stirred, add aqueous slkali, pH value control exists
10-13, the reaction was continued 3-5 hours terminates to reaction, then washed, and mangano-manganic oxide product is obtained after dry.
2. preparation method as described in claim 1, it is characterised in that：The ammonium salt is ammonium chloride, in ammonium sulfate, ammonium nitrate
One or more, ammonium salt addition be manganese powder quality 1%-10%, be preferably 1%-8%, be preferably 1%-5%,
More preferably 1.5%-3%.
3. preparation method as described in claim 1, it is characterised in that：The adhesion promoter is linear alkyl benzene sulfonic acid
Sodium, sodium sulfate of polyethenoxy ether of fatty alcohol, fatty alcohol polyoxyethylene ether ammonium sulfate, sldium lauryl sulfate, lauroyl glutamate,
Nonylphenol polyoxyethylene ether, diglycollic amide, bicyclohexylamine, glycerol stearate monoesters, dimethyl acetamide, 12 are alkyl sulfide
Sour sodium, tetra- sodium of EDTA, ethylene glycol, n-butanol, the one or more in carboxylic acid methyl sodium cellulosate, adhesion promoter addition
It is preferably 0.1%-8% for the 0.1%-10% of manganese powder quality, is preferably 0.1%-6%, is preferably 0.1%-4%, more
Preferably 0.1%-2%, more preferably 0.1%-1%.
4. preparation method as described in claim 1, it is characterised in that：The soluble manganese salt be manganese chloride, manganese sulfate, nitre
One or more in sour manganese, soluble manganese salt addition are the 30%-60% of manganese powder quality, are preferably 35%-
55%, more preferably 40%-50%.
5. preparation method as described in claim 1, it is characterised in that：The aqueous slkali is one in NaOH, KOH, ammonium hydroxide
Kind is a variety of.
6. mangano-manganic oxide prepared by the method according to any one of Claims 1 to 5.
7. mangano-manganic oxide as claimed in claim 6, BET specific surface area 5-7m2/g。
8. a kind of LiMn2O4, mangano-manganic oxide and lithium compound close made of by any one of Claims 1 to 5 the method
Into into.
9. LiMn2O4 as claimed in claim 8, which is characterized in that the lithium compound is lithium carbonate, lithia, hydroxide
One or more in lithium.
10. a kind of application of LiMn2O4 as claimed in claim 8 in anode material for lithium-ion batteries is prepared.
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| CN108585049A (en) * | 2018-06-15 | 2018-09-28 | 中钢集团安徽天源科技股份有限公司 | A kind of mangano-manganic oxide and preparation method thereof |
| CN109336184A (en) * | 2018-10-31 | 2019-02-15 | 胡义华 | A method of mangano-manganic oxide is prepared using two sections of dry method roastings of manganese sulfate |
| CN110336016A (en) * | 2019-07-16 | 2019-10-15 | 中钢集团南京新材料研究院有限公司 | A kind of preparation method for mixing aluminium LiMn2O4 |
| CN110422881A (en) * | 2019-08-15 | 2019-11-08 | 湖南特种金属材料有限责任公司 | A kind of preparation method of trimanganese tetraoxide with high activity |
| CN111994960A (en) * | 2020-07-31 | 2020-11-27 | 湖南双富新材料科技有限公司 | Preparation method of manganese precursor of lithium manganate ion battery positive electrode material |
| CN115180651A (en) * | 2022-09-09 | 2022-10-14 | 河南科隆新能源股份有限公司 | Preparation method of manganous-manganic oxide material with controllable particle size for lithium manganate |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108585049A (en) * | 2018-06-15 | 2018-09-28 | 中钢集团安徽天源科技股份有限公司 | A kind of mangano-manganic oxide and preparation method thereof |
| CN109336184A (en) * | 2018-10-31 | 2019-02-15 | 胡义华 | A method of mangano-manganic oxide is prepared using two sections of dry method roastings of manganese sulfate |
| CN110336016A (en) * | 2019-07-16 | 2019-10-15 | 中钢集团南京新材料研究院有限公司 | A kind of preparation method for mixing aluminium LiMn2O4 |
| CN110422881A (en) * | 2019-08-15 | 2019-11-08 | 湖南特种金属材料有限责任公司 | A kind of preparation method of trimanganese tetraoxide with high activity |
| CN110422881B (en) * | 2019-08-15 | 2022-03-11 | 湖南特种金属材料有限责任公司 | Preparation method of high-activity trimanganese tetroxide |
| CN111994960A (en) * | 2020-07-31 | 2020-11-27 | 湖南双富新材料科技有限公司 | Preparation method of manganese precursor of lithium manganate ion battery positive electrode material |
| CN115321601A (en) * | 2022-08-09 | 2022-11-11 | 贵州金瑞新材料有限责任公司 | Process for preparing high-purity trimanganese tetroxide from manganese sulfate solution |
| CN115180651A (en) * | 2022-09-09 | 2022-10-14 | 河南科隆新能源股份有限公司 | Preparation method of manganous-manganic oxide material with controllable particle size for lithium manganate |
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