CN103746113A - Preparation method of coated spinel lithium manganate composite cathode material - Google Patents
Preparation method of coated spinel lithium manganate composite cathode material Download PDFInfo
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- CN103746113A CN103746113A CN201310753167.0A CN201310753167A CN103746113A CN 103746113 A CN103746113 A CN 103746113A CN 201310753167 A CN201310753167 A CN 201310753167A CN 103746113 A CN103746113 A CN 103746113A
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/36—Selection of substances as active materials, active masses, active liquids
- H01M4/48—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides
- H01M4/52—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of nickel, cobalt or iron
- H01M4/525—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of nickel, cobalt or iron of mixed oxides or hydroxides containing iron, cobalt or nickel for inserting or intercalating light metals, e.g. LiNiO2, LiCoO2 or LiCoOxFy
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01G—COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSES C01D OR C01F
- C01G45/00—Compounds of manganese
- C01G45/12—Manganates manganites or permanganates
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01G—COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSES C01D OR C01F
- C01G53/00—Compounds of nickel
- C01G53/40—Nickelates
- C01G53/42—Nickelates containing alkali metals, e.g. LiNiO2
- C01G53/44—Nickelates containing alkali metals, e.g. LiNiO2 containing manganese
- C01G53/50—Nickelates containing alkali metals, e.g. LiNiO2 containing manganese of the type [MnO2]n-, e.g. Li(NixMn1-x)O2, Li(MyNixMn1-x-y)O2
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/36—Selection of substances as active materials, active masses, active liquids
- H01M4/48—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides
- H01M4/50—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of manganese
- 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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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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Abstract
The invention discloses a preparation method of a coated spinel lithium manganate composite cathode material, which mainly comprises the following steps: dissolving soluble nickel salts and soluble manganese salts so as to obtain a mixed solution A with a certain concentration; preparing a precipitator B with a certain concentration; uniformly mixing a lithium manganate precursor with pure water, and putting the obtained mixture into a coprecipitation reaction kettle; simultaneously adding the solutions A and B into the coprecipitation reaction kettle to carry out a precipitation reaction, so as to obtain coated lithium manganate precursor slurry; and washing and drying so as to obtain a coated precursor; uniformly mixing lithium salts with the coated precursor in a molar ratio of (Li: M) being 0.48-0.6, wherein M refers to the total metal content of the coated precursor; and carrying out high-temperature calcination on the obtained mixture, cooling the obtained object to room temperature, and then crushing and sieving the obtained product so as to obtain the lithium ion battery cathode material. The spinel lithium manganate cathode material prepared according to the preparation method disclosed by the invention has an excellent high-temperature cycle performance, and is of great practical significance.
Description
Technical field
The present invention relates to lithium ion battery manganate cathode material for lithium field, relate in particular to preparation method's technical field of spinel lithium manganate composite positive pole.
Background technology
Lithium manganate having spinel structure LiMn
2o
4it is the positive electrode with three-dimensional lithium ion passage that first Hunter made in 1981, so far receive lot of domestic and international scholar and researcher's very big concern always, it as electrode material have that price is low, current potential is high, environmental friendliness, security performance advantages of higher, be to be hopeful to replace cobalt acid lithium LiCoO most
2become the positive electrode of lithium ion battery of new generation.
But the obtained secondary lithium battery of prior art condition lithium manganate having spinel structure is in the lower cycle charge discharge electric process of high temperature (50-60 ℃), there is following problem: because electrolyte is poor in the compatibility of higher-pressure region and lithium manganate having spinel structure, electrolyte is easily at its Surface disintegration, and reduce the transmitting medium amount in packaged battery, the Mn in lithium manganate having spinel structure
3+disproportionated reaction easily occurs and generate Mn2+ and Mn4+, wherein Mn2+ is soluble in electrolyte and constantly reduces, thereby impels reaction to carry out to the direction of decomposing, and makes the Mn in lithium manganate having spinel structure
3+a large amount of loss, and then reduced the capacitance of battery.
In addition, spinel lithium manganate (LiMn
2o
4) also there is inherent problem, cycle performance is poor, and capacity attenuation is very fast, it has been generally acknowledged that main cause is that the existence of Mn3+ has produced Jahn-Teller effect, and there is distortion of lattice in material, cause volume contraction or expansion in charge and discharge process.
Summary of the invention
Object of the present invention solves above-mentioned relevant spinel lithium manganate (LiMn exactly
2o
4) shortcoming that exists, provide a kind of preparation method of spinel lithium manganese oxide anode material of cladded type, to reach the object of the cycle performance that improves spinel lithium manganate.
For solving above technical problem, the present invention takes following technical scheme:
The preparation method who proposes a kind of cladded type spinel lithium manganate composite positive pole, is characterized in that comprising the following steps:
(1) the soluble manganese salt that is 3:1 by mol ratio and soluble nickel salt are dissolved and are obtained certain density mixed solution A with pure water;
(2) prepare certain density precipitation reagent B;
(3) manganate precursor for lithium and pure water are stirred, put into coprecipitation reaction still;
(4) above-mentioned two kinds of solution A, B are added to coprecipitation reaction still simultaneously, under suitable pH value, temperature, mixing speed, carry out precipitation reaction, obtain the manganate precursor for lithium slurry of cladded type, then washing, dry, obtain coated presoma;
(5) lithium salts and above-mentioned coated presoma are mixed to evenly Li:M=0.48～0.6 in molar ratio, wherein M refers to the total metal contents in soil of cladded type presoma;
(6) sintering: the mixture obtaining is carried out to high-temperature calcination, temperature range 700-1000 ℃, calcination time 2-24 hour, is then cooled to room temperature, pulverizes, and sieves and obtains anode material for lithium-ion batteries.
The concentration range of described mixed solution A is at 0.05-2mol/L.
The concentration range of described precipitation reagent B is 0.05-2mol/L.
Wherein clad material LiNi
0.5mn
1.5o
4with nuclear material LiMn
2o
4mol ratio be 0.01-0.2.
In described step (3), manganate precursor for lithium is selected from the one in manganese dioxide, mangano-manganic oxide, manganese sesquioxide managnic oxide, manganous hydroxide, manganese carbonate.
Soluble nickel salt involved in the present invention is selected from one or more in nickelous sulfate, nickel nitrate, nickel chloride, described soluble manganese salt is selected from one or more in manganese sulfate, manganese nitrate, manganese chloride, and described precipitation reagent is selected from one or more in NaOH, sodium carbonate, sodium acid carbonate, carbonic hydroammonium.Described lithium salts is selected from one or more in lithium carbonate, lithium hydroxide, lithium fluoride.
Preparation scheme similar with existing field compared, the present invention has following advantage: by coated LiNi0.5Mn1.5O4, the operating voltage of spinel lithium manganate is 4.0V, the lithium nickel manganese oxide LiNi0.5Mn1.5O4 of spinel structure equally, operating voltage is 4.6V, and Mn is positive tetravalence in LiNi0.5Mn1.5O4, can there is not Jahn-Teller effect.The material of high workload current potential is coated on to the material outside of low operating potential, intercepting encapsulated material reacts with electrolyte, greatly improve the high temperature cyclic performance of spinel lithium manganate, the while can not cause by coated inert matter as large in the polarization that aluminium oxide etc. causes, the problem of difference of magnification.
brief Description Of Drawings:
Fig. 1 is the lithium ion battery cathode material spinel lithium manganese Electronic Speculum figure of the embodiment of the present invention one obtained cladded type.
Fig. 2 is the lithium ion battery cathode material spinel lithium manganese Electronic Speculum figure of the embodiment of the present invention two obtained cladded types.
Fig. 3 is the lithium ion battery cathode material spinel lithium manganese Electronic Speculum figure of the embodiment of the present invention three obtained cladded types.
Fig. 4 is comparative example one lithium ion battery cathode material spinel lithium manganese LiMn2O4 Electronic Speculum figure.
Fig. 5 is comparative example two lithium ion battery cathode material spinel lithium manganese LiMn2O4 Electronic Speculum figure.
Fig. 6 is the lithium battery cyclic curve figure of the lithium ion battery cathode material spinel lithium manganese preparation of the embodiment of the present invention one obtained cladded type.
Fig. 7 is the lithium battery cyclic curve figure of the lithium ion battery cathode material spinel lithium manganese preparation of the embodiment of the present invention two obtained cladded types.
Fig. 8 is the lithium battery cyclic curve figure of the lithium ion battery cathode material spinel lithium manganese preparation of the embodiment of the present invention three obtained cladded types.
Fig. 9 is the lithium battery cyclic curve figure of the lithium ion battery cathode material spinel lithium manganese LiMn2O4 preparation of comparative example one.
Figure 10 is the lithium battery cyclic curve figure of comparative example two lithium ion battery cathode material spinel lithium manganese LiMn2O4 preparations.
Embodiment:
Below in conjunction with embodiment and Figure of description, technical scheme of the present invention is described in detail:
[embodiment mono-]
Manganese sulfate, nickelous sulfate, according to mol ratio 3:1 deionized water dissolving, are prepared into the salting liquid A of 0.1mol/L;
Weigh the precipitation reagent B that appropriate NaOH deionized water is configured to 0.2mol/L;
After weighing 1000g manganese dioxide and 10L pure water stir, put into coprecipitation reaction still;
Getting the 10L salting liquid A that configures and 10L precipitation reagent B adds and in coprecipitation reaction still, carries out coating reaction with certain flow rate with pump simultaneously, control ph value of reaction 10.0, after having reacted, by the slurries filtration obtaining, with deionized water, wash 5 times and be dried afterwards, obtain coated presoma.
By lithium carbonate and above-mentioned coated presoma in molar ratio Li:M=0.52 in mixer, be mixed to evenly.
Mixture is put into sintering kiln, sintering cool to room temperature after 10 hours at 900 ℃, grinding is sieved, and obtains the lithium ion battery cathode material spinel lithium manganese of cladded type.
The lithium ion battery cathode material spinel lithium manganese Electronic Speculum figure of the embodiment of the present invention one obtained cladded type is as Fig. 1.
The lithium battery cyclic curve of the lithium ion battery cathode material spinel lithium manganese preparation of the present embodiment cladded type as shown in Figure 6.
The clad material of the present embodiment is LiNi0.5Mn1.5O4, and nuclear material is LiMn2O4, LiNi0.5Mn1.5O4 and LiMn2O4 and mol ratio be 0.1:0.9.
The material obtaining, in button cell, discharges and recharges under 60 ℃, 0.5C multiplying power, and first run capacity can reach 110mAh/g.50 take turns circulation after capability retention be 98%(table 1).
[embodiment bis-]
Manganese sulfate, nickelous sulfate, according to mol ratio 3:1 deionized water dissolving, are prepared into the salting liquid A of 0.1mol/L.
Weigh the precipitation reagent B that appropriate NaOH deionized water is configured to 0.2mol/L.
After weighing 1000g manganese dioxide and 10L pure water stir, put into coprecipitation reaction still.
Getting the 6L salting liquid A that configures and 6L precipitation reagent B adds and in coprecipitation reaction still, carries out coating reaction with certain flow rate with pump simultaneously, control ph value of reaction 10.0, after having reacted, by the slurries filtration obtaining, with deionized water, wash 5 times and be dried afterwards, obtain coated presoma.
By lithium carbonate and above-mentioned coated presoma in molar ratio Li:M=0.52 in mixer, be mixed to evenly.
Mixture is put into sintering kiln, sintering cool to room temperature after 10 hours at 900 ℃, grinding is sieved, and obtains the lithium ion battery cathode material spinel lithium manganese of cladded type.
The lithium ion battery cathode material spinel lithium manganese Electronic Speculum figure of the embodiment of the present invention two obtained cladded types is as Fig. 2.
The lithium battery cyclic curve of the lithium ion battery cathode material spinel lithium manganese preparation of the present embodiment cladded type as shown in Figure 7.
The clad material of the present embodiment is LiNi0.5Mn1.5O4, and nuclear material is LiMn2O4, LiNi0.5Mn1.5O4 and LiMn2O4 and mol ratio be 0.05:0.95.
The material obtaining, in button cell, discharges and recharges under 60 ℃, 0.5C multiplying power, and first run capacity can reach 115mAh/g.50 take turns circulation after capability retention be 96.5%(table 1).
[comparative example one]
By lithium carbonate and manganese dioxide in molar ratio Li:M=0.52 in mixer, be mixed to evenly.
Mixture is put into sintering kiln, sintering cool to room temperature after 10 hours at 900 ℃, grinding is sieved, and obtains lithium ion battery cathode material spinel lithium manganese LiMn2O4.
The lithium ion battery cathode material spinel lithium manganese LiMn2O4 Electronic Speculum figure of comparative example one is as Fig. 4.
The lithium battery cyclic curve of the lithium ion battery cathode material spinel lithium manganese LiMn2O4 preparation of comparative example one as shown in Figure 9.
The material obtaining, in button cell, discharges and recharges under 60 ℃, 0.5C multiplying power, and first run capacity can reach 118mAh/g.100 take turns circulation after capability retention be 82%(table 1).
[embodiment tri-]
Manganese sulfate, nickelous sulfate, according to mol ratio 3:1 deionized water dissolving, are prepared into the salting liquid A of 0.1mol/L.
Weigh the aqueous slkali B that appropriate sodium carbonate deionized water is configured to 0.1mol/L.
After weighing 1000g mangano-manganic oxide and 10L pure water stir, put into coprecipitation reaction still.
Getting the 12L salting liquid A that configures and 12L aqueous slkali B adds and in coprecipitation reaction still, carries out coating reaction with certain flow rate with pump simultaneously, control ph value of reaction 10.0, after having reacted, by the slurries filtration obtaining, with deionized water, wash 5 times and be dried afterwards, obtain coated presoma.
By lithium hydroxide and above-mentioned coated presoma in molar ratio Li:M=0.52 in mixer, be mixed to evenly.
Mixture is put into sintering kiln, sintering cool to room temperature after 10 hours at 900 ℃, grinding is sieved, and obtains the lithium ion battery cathode material spinel lithium manganese of cladded type.
The lithium ion battery cathode material spinel lithium manganese Electronic Speculum figure of the embodiment of the present invention three obtained cladded types is as Fig. 3.
The present embodiment make cladded type lithium ion battery cathode material spinel lithium manganese lithium battery cyclic curve as shown in Figure 8.
The clad material of the present embodiment is LiNi0.5Mn1.5O4, and nuclear material is LiMn2O4, LiNi0.5Mn1.5O4 and LiMn2O4 and mol ratio be 0.15:0.85.
The material obtaining, in button cell, discharges and recharges under 60 ℃, 0.5C multiplying power, and first run capacity can reach 103mAh/g.50 take turns circulation after capability retention be 100%(table 1).
[comparative example two]
By lithium hydroxide and mangano-manganic oxide in molar ratio Li:M=0.52 in mixer, be mixed to evenly.
Mixture is put into sintering kiln, sintering cool to room temperature after 10 hours at 900 ℃, grinding is sieved, and obtains lithium ion battery cathode material spinel lithium manganese LiMn2O4.
Comparative example two lithium ion battery cathode material spinel lithium manganese LiMn2O4 Electronic Speculum figure are as Fig. 5.
The lithium battery cyclic curve of the lithium ion battery cathode material spinel lithium manganese LiMn2O4 preparation of this comparative example as shown in figure 10.
The material obtaining, in button cell, discharges and recharges under 60 ℃, 0.5C multiplying power, and first run capacity can reach 125mAh/g.100 take turns circulation after capability retention be 80%(table 1).
Table 1 charging and discharging lithium battery performance data table
Claims (6)
1. a preparation method for cladded type spinel lithium manganate composite positive pole, is characterized in that comprising the following steps:
(1) the soluble manganese salt that is 3:1 by mol ratio and soluble nickel salt are dissolved and are obtained certain density mixed solution A with pure water;
(2) prepare certain density precipitation reagent B;
(3) manganate precursor for lithium and pure water are stirred, put into coprecipitation reaction still;
(4) above-mentioned two kinds of solution A, B are added to coprecipitation reaction still simultaneously, under suitable pH value, temperature, mixing speed, carry out precipitation reaction, obtain cladded type manganate precursor for lithium slurry, then washing, dry, obtain coated presoma;
(5) lithium salts and above-mentioned coated presoma are mixed to evenly Li:M=0.48～0.6 in molar ratio, wherein M refers to the total metal contents in soil of cladded type presoma;
(6) sintering: the mixture obtaining is carried out to high-temperature calcination, temperature range 700-1000 ℃, calcination time 2-24 hour, is then cooled to room temperature, pulverizes, and sieves and obtains anode material for lithium-ion batteries.
2. the preparation method of cladded type spinel lithium manganate composite positive pole according to claim 1, is characterized in that: the concentration range of described mixed solution A is at 0.05-2mol/L.
3. the preparation method of cladded type spinel lithium manganate composite positive pole according to claim 1, is characterized in that: the concentration range of described precipitation reagent B is 0.05-2mol/L.
4. the preparation method of cladded type spinel lithium manganate composite positive pole according to claim 1, is characterized in that: wherein clad material LiNi
0.5mn
1.5o
4with nuclear material LiMn
2o
4mol ratio be 0.01-0.2.
5. the preparation method of cladded type spinel lithium manganate composite positive pole according to claim 1, is characterized in that: in described step (3), manganate precursor for lithium is selected from the one in manganese dioxide, mangano-manganic oxide, manganese sesquioxide managnic oxide, manganous hydroxide, manganese carbonate.
6. the preparation method of cladded type spinel lithium manganate composite positive pole according to claim 1, it is characterized in that: described soluble nickel salt is selected from one or more in nickelous sulfate, nickel nitrate, nickel chloride, described soluble manganese salt is selected from one or more in manganese sulfate, manganese nitrate, manganese chloride, described precipitation reagent is selected from one or more in NaOH, sodium carbonate, sodium acid carbonate, carbonic hydroammonium, and described lithium salts is selected from one or more in lithium carbonate, lithium hydroxide, lithium fluoride.
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104953109A (en) * | 2015-05-11 | 2015-09-30 | 中信国安盟固利电源技术有限公司 | Core-shell-structure lithium manganate capable of improving high temperature resistance performance, and synthesis method of core-shell-structure lithium manganate |
| CN105244475B (en) * | 2015-11-14 | 2018-03-09 | 福建师范大学 | A kind of composite spinelle material and its preparation method and application |
| CN108390050A (en) * | 2018-04-28 | 2018-08-10 | 北京鼎鑫钢联科技协同创新研究院有限公司 | A kind of method for coating of lithium battery lithium manganate having spinel structure positive electrode |
| CN108455676A (en) * | 2018-03-28 | 2018-08-28 | 山东省科学院能源研究所 | A kind of preparation method of anode material for lithium-ion batteries nano spinel LiMn2O4 |
| CN113782722A (en) * | 2021-08-31 | 2021-12-10 | 深圳市泽塔电源系统有限公司 | Preparation process of spherical lithium manganate cathode material |
| CN114388812A (en) * | 2022-03-23 | 2022-04-22 | 宜宾锂宝新材料有限公司 | Nickel-manganese spinel type positive electrode material and preparation method and application thereof |
| CN115528228A (en) * | 2022-09-28 | 2022-12-27 | 安徽博石高科新材料股份有限公司 | Lithium molybdate coated modified lithium manganate material and preparation method and application thereof |
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| CN101284684A (en) * | 2008-05-29 | 2008-10-15 | 金川集团有限公司 | Preparing method for nickel-cobalt-lithium manganate precursor of lithium ionic cell positive material |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104953109A (en) * | 2015-05-11 | 2015-09-30 | 中信国安盟固利电源技术有限公司 | Core-shell-structure lithium manganate capable of improving high temperature resistance performance, and synthesis method of core-shell-structure lithium manganate |
| CN105244475B (en) * | 2015-11-14 | 2018-03-09 | 福建师范大学 | A kind of composite spinelle material and its preparation method and application |
| CN108455676A (en) * | 2018-03-28 | 2018-08-28 | 山东省科学院能源研究所 | A kind of preparation method of anode material for lithium-ion batteries nano spinel LiMn2O4 |
| CN108390050A (en) * | 2018-04-28 | 2018-08-10 | 北京鼎鑫钢联科技协同创新研究院有限公司 | A kind of method for coating of lithium battery lithium manganate having spinel structure positive electrode |
| CN108390050B (en) * | 2018-04-28 | 2020-10-27 | 北京鼎鑫钢联科技协同创新研究院有限公司 | Coating method of spinel type lithium manganate positive electrode material for lithium battery |
| CN113782722A (en) * | 2021-08-31 | 2021-12-10 | 深圳市泽塔电源系统有限公司 | Preparation process of spherical lithium manganate cathode material |
| CN114388812A (en) * | 2022-03-23 | 2022-04-22 | 宜宾锂宝新材料有限公司 | Nickel-manganese spinel type positive electrode material and preparation method and application thereof |
| CN114388812B (en) * | 2022-03-23 | 2022-06-03 | 宜宾锂宝新材料有限公司 | Nickel-manganese spinel type positive electrode material and preparation method and application thereof |
| CN115528228A (en) * | 2022-09-28 | 2022-12-27 | 安徽博石高科新材料股份有限公司 | Lithium molybdate coated modified lithium manganate material and preparation method and application thereof |
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Application publication date: 20140423 |