CN102496709A - LiNi0.5Mn1.5O4 material, preparation method thereof and lithium ion battery containing the material - Google Patents
LiNi0.5Mn1.5O4 material, preparation method thereof and lithium ion battery containing the material Download PDFInfo
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- CN102496709A CN102496709A CN2011104464406A CN201110446440A CN102496709A CN 102496709 A CN102496709 A CN 102496709A CN 2011104464406 A CN2011104464406 A CN 2011104464406A CN 201110446440 A CN201110446440 A CN 201110446440A CN 102496709 A CN102496709 A CN 102496709A
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- 239000000463 material Substances 0.000 title claims abstract description 59
- 238000002360 preparation method Methods 0.000 title claims abstract description 34
- 229910002099 LiNi0.5Mn1.5O4 Inorganic materials 0.000 title claims abstract description 32
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 title claims abstract description 31
- 229910001416 lithium ion Inorganic materials 0.000 title claims abstract description 31
- 239000011572 manganese Substances 0.000 claims abstract description 63
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims abstract description 31
- 238000000034 method Methods 0.000 claims abstract description 21
- ZAUUZASCMSWKGX-UHFFFAOYSA-N manganese nickel Chemical compound [Mn].[Ni] ZAUUZASCMSWKGX-UHFFFAOYSA-N 0.000 claims abstract description 20
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 claims abstract description 19
- 229910052744 lithium Inorganic materials 0.000 claims abstract description 19
- 229910052748 manganese Inorganic materials 0.000 claims abstract description 13
- 229910052759 nickel Inorganic materials 0.000 claims abstract description 13
- 238000000137 annealing Methods 0.000 claims abstract description 11
- 238000001354 calcination Methods 0.000 claims abstract description 11
- 239000002243 precursor Substances 0.000 claims abstract description 10
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 claims abstract description 8
- 238000001816 cooling Methods 0.000 claims abstract description 7
- 229910013716 LiNi Inorganic materials 0.000 claims description 35
- 239000000203 mixture Substances 0.000 claims description 19
- WMFOQBRAJBCJND-UHFFFAOYSA-M Lithium hydroxide Chemical compound [Li+].[OH-] WMFOQBRAJBCJND-UHFFFAOYSA-M 0.000 claims description 12
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 10
- 238000000227 grinding Methods 0.000 claims description 9
- IIPYXGDZVMZOAP-UHFFFAOYSA-N lithium nitrate Chemical compound [Li+].[O-][N+]([O-])=O IIPYXGDZVMZOAP-UHFFFAOYSA-N 0.000 claims description 8
- FXOOEXPVBUPUIL-UHFFFAOYSA-J manganese(2+);nickel(2+);tetrahydroxide Chemical compound [OH-].[OH-].[OH-].[OH-].[Mn+2].[Ni+2] FXOOEXPVBUPUIL-UHFFFAOYSA-J 0.000 claims description 7
- XGZVUEUWXADBQD-UHFFFAOYSA-L lithium carbonate Chemical compound [Li+].[Li+].[O-]C([O-])=O XGZVUEUWXADBQD-UHFFFAOYSA-L 0.000 claims description 6
- 229910052808 lithium carbonate Inorganic materials 0.000 claims description 6
- 239000007788 liquid Substances 0.000 claims description 5
- HZISTRYOBSVSHK-UHFFFAOYSA-J manganese(2+) nickel(2+) oxalate Chemical class [Mn++].[Ni++].[O-]C(=O)C([O-])=O.[O-]C(=O)C([O-])=O HZISTRYOBSVSHK-UHFFFAOYSA-J 0.000 claims description 5
- YZKFERUFEMBBKY-UHFFFAOYSA-J manganese(2+) nickel(2+) tetraacetate Chemical compound [Ni+2].C(C)(=O)[O-].[Mn+2].C(C)(=O)[O-].C(C)(=O)[O-].C(C)(=O)[O-] YZKFERUFEMBBKY-UHFFFAOYSA-J 0.000 claims description 5
- ZWEKKXQMUMQWRN-UHFFFAOYSA-J manganese(2+);nickel(2+);dicarbonate Chemical compound [Mn+2].[Ni+2].[O-]C([O-])=O.[O-]C([O-])=O ZWEKKXQMUMQWRN-UHFFFAOYSA-J 0.000 claims description 5
- 229910052757 nitrogen Inorganic materials 0.000 claims description 5
- 238000010298 pulverizing process Methods 0.000 claims description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 2
- 238000002156 mixing Methods 0.000 abstract description 2
- 238000010791 quenching Methods 0.000 abstract 1
- 230000000171 quenching effect Effects 0.000 abstract 1
- 238000004519 manufacturing process Methods 0.000 description 5
- 239000000126 substance Substances 0.000 description 5
- 230000008569 process Effects 0.000 description 4
- 229910006703 Li—Ni—Mn—O Inorganic materials 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 239000007772 electrode material Substances 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 230000014759 maintenance of location Effects 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 1
- 238000002441 X-ray diffraction Methods 0.000 description 1
- 238000000498 ball milling Methods 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000009837 dry grinding Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000036314 physical performance Effects 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 238000001238 wet grinding Methods 0.000 description 1
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Classifications
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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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- 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 provides a LiNi0.5Mn1.5O4 material, a preparation method thereof and a lithium ion battery containing the material, belongs to the technical field of lithium ion battery and can solve a problem of low tap density of an existing LiNi0.5Mn1.5O4 material. The preparation method of the LiNi0.5Mn1.5O4 material provided by the invention comprises steps of: preparing a nickel manganese precursor with a molar ratio of nickel to manganese equal to 1:3; calcining the nickel manganese precursor for 3-10 h at 400-750 DEG C and quenching; mixing the quenched calcining products with a lithium source and crushing, wherein a molar ratio of lithium to the total content of nickel and manganese equals to 1:1.9 to 1:2.1; and roasting the crushed products at 700-900 DEG C for 5-15 h, annealing at 600-700 DEG C for 10-24 h and cooling to a room temperature to obtain a finished product. The LiNi0.5Mn1.5O4 material of the invention is prepared by the above method; and the lithium ion battery of the invention comprises the above LiNi0.5Mn1.5O4 material.
Description
Technical field
The invention belongs to technical field of lithium ion, be specifically related to a kind of Li-Ni-Mn-O material and preparation method thereof, contain the lithium ion battery of this material.
Background technology
Energy density is one of important indicator of estimating the lithium ion battery performance.And the energy density of lithium ion battery is except that the influence that receives electrode material specific capacity etc.; Also relevant with physical performance indexs such as the tap density of electrode material, compacted densities; Because tap density is big more, the quality of material is just big more in the equal volume, and its energy that can store is also just many more.LiNi
0.5Mn
1.5O
4Material is owing to have advantages such as operating voltage height, specific energy height, aboundresources, low price, is considered to one of the positive electrode of the lithium ion battery of tool potentiality, in fields such as hybrid vehicle, pure electric automobiles broad prospect of application arranged.Thus it is clear that, improve LiNi
0.5Mn
1.5O
4The tap density of material can be improved its performance.
Existing preparation LiNi
0.5Mn
1.5O
4The method of material is normally mixed nickel manganese precursor with the lithium source, ball mill grinding afterwards, heat treatment obtain product; Wherein nickel manganese precursor is a nickel manganese hydroxide, nickel manganese carbonate, and nickel manganese oxalates, nickel manganese acetate etc., the lithium source is a lithium carbonate, lithium hydroxide, lithium nitrate etc.The LiNi of this method preparation
0.5Mn
1.5O
4The material tap density can only reach about 2.0g/ml.
Summary of the invention
Technical problem to be solved by this invention comprises, to the LiNi of existing method preparation
0.5Mn
1.5O
4The problem that the material tap density is not high provides a kind of LiNi for preparing high-tap density
0.5Mn
1.5O
4The method of material.
Solving the technical scheme that technical problem of the present invention adopted is a kind of LiNi
0.5Mn
1.5O
4Preparation methods comprises:
Prepare nickel manganese presoma, the mol ratio of nickel content and manganese content is 1: 3 in the said nickel manganese presoma, calcines said nickel manganese presomas 3 hours to 10 hours at 400 ℃ to 750 ℃, afterwards chilling;
To mix with the lithium source through the calcined product of chilling and pulverize, the mol ratio of lithium content and nickel, manganese total content was at 1: 1.95 to 1: 2.1 in the mixture;
Crushed products 700 ℃ to 900 ℃ following roastings 5 hours to 15 hours, in 600 ℃ to 700 ℃ annealing 10 hours to 24 hours, is cooled to room temperature and obtains LiNi again
0.5Mn
1.5O
4Material.
LiNi of the present invention
0.5Mn
1.5O
4In the preparation methods; Increased the step of nickel manganese precursor being carried out pre-burning (i.e. calcining) and chilling; Make nickel manganese precursor with just change oxide form into before mix in the lithium source; Variation has all taken place in the form during itself and lithium source reaction, density, process etc., and this method is also to adjusting with the process of lithium source reaction simultaneously, thereby guarantees the LiNi that finally makes
0.5Mn
1.5O
4The tap density of material is high.
Preferably, said nickel manganese precursor is any one in nickel manganese hydroxide, nickel manganese carbonate, nickel manganese oxalates, the nickel manganese acetate.
Preferably, the temperature of said calcining is at 500 ℃ to 650 ℃, and the time was at 5 hours to 8 hours.
Preferably, said chilling is for to be chilled to room temperature through cooled with liquid nitrogen or water cooling.
Preferably, said lithium source is any one in lithium carbonate, lithium hydroxide, the lithium nitrate.
Preferably, said pulverizing is ball mill grinding or grinds.
Preferably, the temperature of said roasting is at 750 ℃ to 850 ℃, and the time was at 8 hours to 12 hours; The temperature of said annealing is at 625 ℃ to 675 ℃, and the time was at 14 hours to 20 hours.
Preferably, the said room temperature that is cooled to is for cooling to room temperature with the furnace.
Technical problem to be solved by this invention also comprises, to existing LiNi
0.5Mn
1.5O
4The problem that the material tap density is low provides a kind of tap density high LiNi
0.5Mn
1.5O
4Material.
Solving the technical scheme that technical problem of the present invention adopted is a kind of LiNi
0.5Mn
1.5O
4Material, it is through method for preparing, and its tap density is between 2.4g/ml to 2.6g/ml.
Because LiNi of the present invention
0.5Mn
1.5O
4Material is through method for preparing, so its tap density is high, performances such as its specific capacity, circulation volume conservation rate are also all fine simultaneously.
Technical problem to be solved by this invention also comprises, to the low problem of the energy density of existing lithium ion battery, provides a kind of energy density high lithium ion battery.
Solving the technical scheme that technical problem of the present invention adopted is a kind of lithium ion battery, and its positive pole contains above-mentioned LiNi
0.5Mn
1.5O
4Material.
Because the positive pole of lithium ion battery of the present invention adopts the LiNi of above-mentioned high-tap density
0.5Mn
1.5O
4Material, so its energy density is high.
The present invention is specially adapted to the positive electrode of lithium ion battery.
Description of drawings
Fig. 1 is the LiNi of embodiment of the invention preparation
0.5Mn
1.5O
4The XRD of material (X-ray diffraction) figure;
Fig. 2 is the LiNi of embodiment of the invention preparation
0.5Mn
1.5O
4The first charge-discharge curve chart of material.
Embodiment
For making those skilled in the art understand technical scheme of the present invention better, the present invention is described in further detail below in conjunction with accompanying drawing and embodiment.
Embodiment 1:
Present embodiment provides a kind of LiNi
0.5Mn
1.5O
4Preparation methods comprises:
Prepare nickel manganese presoma, the mol ratio of nickel content and manganese content is 1: 3 in the said nickel manganese presoma, calcines said nickel manganese presomas 3 hours to 10 hours at 400 ℃ to 750 ℃, afterwards chilling;
To mix with the lithium source through the calcined product of chilling and pulverize, the mol ratio of lithium content and nickel, manganese total content was at 1: 1.95 to 1: 2.1 in the mixture;
Crushed products 700 ℃ to 900 ℃ following roastings 5 hours to 15 hours, in 600 ℃ to 700 ℃ annealing 10 hours to 24 hours, is cooled to room temperature and obtains LiNi again
0.5Mn
1.5O
4Material.
The LiNi of present embodiment
0.5Mn
1.5O
4In the preparation methods; Increased the step of nickel manganese precursor being carried out pre-burning (i.e. calcining) and chilling; Make nickel manganese precursor with just change oxide form into before mix in the lithium source; Variation has all taken place in the form during itself and lithium source reaction, density, process etc., and this method is also to adjusting with the process of lithium source reaction simultaneously, thereby guarantees the LiNi that finally makes
0.5Mn
1.5O
4The tap density of material is high.
Embodiment 2:
Present embodiment provides a kind of LiNi
0.5Mn
1.5O
4Preparation methods, it may further comprise the steps:
Step (1): at 400 ℃ of calcining 3h, Ni: Mn=1 in the nickel manganese hydroxide: 3 (mol ratios), for example its chemical formula can be Ni with nickel manganese hydroxide
0.5Mn
1.5(OH)
4Through water-cooled mode calcined product (Ni, Mn oxide) is chilled to room temperature.
Step (2): calcined product and lithium carbonate that step (1) is obtained mix back ball mill grinding, Li in this mixture: (Ni+Mn)=1: 2 (mol ratio).
Step (3): the mixture that step (2) is obtained in 700 ℃ of annealing 10h, cools to room temperature with the furnace more at last at 900 ℃ of following roasting 5h, obtains LiNi
0.5Mn
1.5O
4The powdery product of material.
Through test, the LiNi of the method for present embodiment preparation
0.5Mn
1.5O
4The discharge capacity first of material reaches 141mAh/g, and 100 times the circulation volume conservation rate reaches 97.8%, and tap density is 2.5g/ml; Adopting 204468 type lithium ion battery energy densities of this production is 150Wh/kg or 382Wh/L.
Embodiment 3:
Present embodiment provides a kind of LiNi
0.5Mn
1.5O
4Preparation methods, it may further comprise the steps:
Step (1): at 650 ℃ of calcining 10h, Ni: Mn=1 in the nickel manganese carbonate: 3 (mol ratios), for example its chemical formula can be Ni with nickel manganese carbonate
0.5Mn
1.5(CO
3)
2Mode through cooled with liquid nitrogen is chilled to room temperature with calcined product (Ni, Mn oxide).
Step (2): calcined product and lithium carbonate that step (1) is obtained mix back ball mill grinding, Li in this mixture: (Ni+Mn)=1: 2.1 (mol ratio).
Step (3): the mixture that step (2) is obtained in 600 ℃ of annealing 24h, cools to room temperature with the furnace more at last at 850 ℃ of following roasting 8h, obtains LiNi
0.5Mn
1.5O
4The powdery product of material.
Through test, the LiNi of the method for present embodiment preparation
0.5Mn
1.5O
4The discharge capacity first of material reaches 142mAh/g, and 100 times the circulation volume conservation rate reaches 98.1%, and tap density is 2.53g/ml; Adopting 204468 type lithium ion battery energy densities of this production is 155Wh/kg or 390Wh/L.
Embodiment 4:
Present embodiment provides a kind of LiNi
0.5Mn
1.5O
4Preparation methods, it may further comprise the steps:
Step (1): at 500 ℃ of calcining 5h, Ni: Mn=1 in the nickel manganese oxalates: 3 (mol ratios), for example its chemical formula can be Ni with nickel manganese oxalates
0.5Mn
1.5(C
2O
4)
2Through water-cooled mode with calcined product (Ni, Mn oxide) chilling.
Step (2): calcined product and lithium nitrate that step (1) is obtained mix back ball mill grinding, Li in this mixture: (Ni+Mn)=1: 1.95 (mol ratio).
Step (3): the mixture that step (2) is obtained in 675 ℃ of annealing 20h, cools to room temperature with the furnace more at last at 700 ℃ of following roasting 15h, obtains LiNi
0.5Mn
1.5O
4The powdery product of material.
Through test, the LiNi of the method for present embodiment preparation
0.5Mn
1.5O
4The discharge capacity first of material reaches 144mAh/g, and 100 times the circulation volume conservation rate reaches 97.5%, and tap density is 2.48g/ml; Adopting 204468 type lithium ion battery energy densities of this production is 149Wh/kg or 380Wh/L.
Embodiment 5:
Present embodiment provides a kind of LiNi
0.5Mn
1.5O
4Preparation methods, it may further comprise the steps:
Step (1): at 750 ℃ of calcining 8h, Ni: Mn=1 in the nickel manganese acetate: 3 (mol ratios), for example its chemical formula can be Ni with nickel manganese acetate
0.5Mn
1.5(CH
3COO)
4Through water-cooled mode calcined product (Ni, Mn oxide) is chilled to room temperature.
Step (2): calcined product that step (1) is obtained and lithium hydroxide grind Li in this mixture after mixing: (Ni+Mn)=1: 1.98 (mol ratio).
Step (3): the mixture that step (2) is obtained in 625 ℃ of annealing 14h, is cooled to room temperature more at last at 750 ℃ of following roasting 12h, obtains LiNi
0.5Mn
1.5O
4The powdery product of material.
Through test, the LiNi of the method for present embodiment preparation
0.5Mn
1.5O
4The discharge capacity first of material reaches 140mAh/g, and 100 times the circulation volume conservation rate reaches 98.5%, and tap density is 2.4g/ml; Adopting 204468 type lithium ion battery energy densities of this production is 152Wh/kg or 388Wh/L.
Embodiment 6:
Present embodiment provides a kind of LiNi
0.5Mn
1.5O
4Preparation methods, it may further comprise the steps:
Step (1): at 550 ℃ of calcining 7h, Ni: Mn=1 in the nickel manganese hydroxide: 3 (mol ratios), for example its chemical formula can be Ni with nickel manganese hydroxide
0.5Mn
1.5(OH)
4Mode through cooled with liquid nitrogen is chilled to room temperature with calcined product (Ni, Mn oxide).
Step (2): calcined product and lithium carbonate that step (1) is obtained mix back ball mill grinding, Li in this mixture: (Ni+Mn)=1: 2.03 (mol ratio).
Step (3): the mixture that step (2) is obtained in 650 ℃ of annealing 16h, cools to room temperature with the furnace more at last at 800 ℃ of following roasting 10h, obtains LiNi
0.5Mn
1.5O
4The powdery product of material.
Through test, the LiNi of the method for present embodiment preparation
0.5Mn
1.5O
4The discharge capacity first of material reaches 148mAh/g, and 100 times the circulation volume conservation rate reaches 98.3%, and tap density is 2.6g/ml; Adopting 204468 type lithium ion battery energy densities of this production is 159Wh/kg or 392Wh/L.
Obviously, the preparation method of above-mentioned each embodiment also can carry out many known variations; For example: other known compound also can be selected in nickel manganese presoma, lithium source; Chilling also can adopt other known manner except that cooled with liquid nitrogen and water-cooled to carry out, and it slowly returns back to room temperature after can being chilled to below the room temperature earlier again; Cooling also can be adopted except that carrying out with other known manner the stove cooling; Ball mill grinding can be dry grinding, also can be the wet-milling of using ball milling agent such as alcohol; Pulverize also can adopt except that grind with ball mill grinding other known manner carry out; According to the different situations of each heat treatment step, can be chosen in the air atmosphere and carry out (prerequisite is bad reaction not to take place), also can carry out in a vacuum, also can under protective atmosphere, carry out etc.
Embodiment 7:
Present embodiment provides a kind of LiNi
0.5Mn
1.5O
4Material, it is through method for preparing, and its tap density is between 2.4g/ml to 2.6g/ml.
Because the LiNi of present embodiment
0.5Mn
1.5O
4Material is through method for preparing, so its tap density is high, performances such as its specific capacity, circulation volume conservation rate are also all fine simultaneously.
As shown in Figure 1, the LiNi of visible present embodiment
0.5Mn
1.5O
4Diffraction maximum is sharp-pointed in the XRD figure of material, peak value is high, the position is accurate, assorted peak is few, proves that its purity is high, the well-crystallized.
As shown in Figure 2, the LiNi of visible present embodiment
0.5Mn
1.5O
4Platform is obvious and current potential is high in the first charge-discharge curve of material, shows that it is suitable for using as the positive electrode of battery.
As shown in table 1, the LiNi of visible present embodiment
0.5Mn
1.5O
4The obvious tap density of material is all between 2.4g/ml to 2.6g/ml, apparently higher than existing LiNi
0.5Mn
1.5O
4The level of material 2.0g/ml effect, and the LiNi of present embodiment
0.5Mn
1.5O
4The specific capacity of material and capability retention are also all greater than existing LiNi
0.5Mn
1.5O
4Material.
The LiNi of table 1 present embodiment
0.5Mn
1.5O
4Material and existing LiNi
0.5Mn
1.5O
4The performance table of comparisons of material
| Project | Existing product 1 | Existing product 2 | Existing product 3 | Product of the present invention |
| Tap density (g/ml) | ?1.95 | ?2.03 | ?2.08 | 2.4-2.6 |
| Specific capacity (mAh/g) | ?130 | ?135 | ?125 | 140-148 |
| 100 capability retentions (%) | ?92 | ?93 | ?95 | 97.5-98.5 |
Embodiment 8:
Present embodiment provides a kind of lithium ion battery, and its positive pole contains above-mentioned LiNi
0.5Mn
1.5O
4Material.
Certainly, also should comprise other material known such as negative material, collector, element etc. in the lithium ion battery of this enforcement.
Because the positive pole of the lithium ion battery of present embodiment adopts the LiNi of above-mentioned high-tap density
0.5Mn
1.5O
4Material, so its energy density is high.
Table 2 is the performance table of comparisons of the lithium ion battery of existing 204468 type lithium ion batteries and present embodiment, and wherein " product of the present invention " expression is with the LiNi of the foregoing description
0.5Mn
1.5O
4Material is as the positive electrode of 204468 type lithium ion batteries and the performance of the battery that obtains.It is thus clear that the energy density of the lithium ion battery of present embodiment (comprising mass energy density and volume energy density) is all obviously greater than existing lithium ion battery, and wherein the gap of volume energy density is more obvious.
The performance table of comparisons of the lithium ion battery of table 2 present embodiment and existing 204468 type lithium ion batteries
| Project | Existing product 1 | Existing product 2 | Existing product 3 | Product of the present invention |
| Mass energy density (Wh/kg) | ?120 | ?112 | ?125 | 149-159 |
| Volume energy density (Wh/L) | ?310 | ?300 | ?320 | 380-392 |
It is understandable that above execution mode only is the illustrative embodiments that adopts for principle of the present invention is described, yet the present invention is not limited thereto.For the one of ordinary skilled in the art, under the situation that does not break away from spirit of the present invention and essence, can make various modification and improvement, these modification also are regarded as protection scope of the present invention with improving.
Claims (10)
1. LiNi
0.5Mn
1.5O
4Preparation methods is characterized in that, comprising:
Prepare nickel manganese presoma, the mol ratio of nickel content and manganese content is 1: 3 in the said nickel manganese presoma, calcines said nickel manganese presomas 3 hours to 10 hours at 400 ℃ to 750 ℃, afterwards chilling;
To mix with the lithium source through the calcined product of chilling and pulverize, the mol ratio of lithium content and nickel, manganese total content was at 1: 1.95 to 1: 2.1 in the mixture;
Crushed products 700 ℃ to 900 ℃ following roastings 5 hours to 15 hours, in 600 ℃ to 700 ℃ annealing 10 hours to 24 hours, is cooled to room temperature and obtains LiNi again
0.5Mn
1.5O
4Material.
2. LiNi according to claim 1
0.5Mn
1.5O
4Preparation methods is characterized in that,
Said nickel manganese precursor is any one in nickel manganese hydroxide, nickel manganese carbonate, nickel manganese oxalates, the nickel manganese acetate.
3. LiNi according to claim 1
0.5Mn
1.5O
4Preparation methods is characterized in that,
The temperature of said calcining is at 500 ℃ to 650 ℃, and the time was at 5 hours to 8 hours.
4. LiNi according to claim 1
0.5Mn
1.5O
4Preparation methods is characterized in that,
Said chilling is for to be chilled to room temperature through cooled with liquid nitrogen or water cooling.
5. according to any described LiNi in the claim 1 to 4
0.5Mn
1.5O
4Preparation methods is characterized in that,
Said lithium source is any one in lithium carbonate, lithium hydroxide, the lithium nitrate.
6. according to any described LiNi in the claim 1 to 4
0.5Mn
1.5O
4Preparation methods is characterized in that,
Said pulverizing is ball mill grinding or grinds.
7. according to any described LiNi in the claim 1 to 4
0.5Mn
1.5O
4Preparation methods is characterized in that,
The temperature of said roasting is at 750 ℃ to 850 ℃, and the time was at 8 hours to 12 hours;
The temperature of said annealing is at 625 ℃ to 675 ℃, and the time was at 14 hours to 20 hours.
8. according to any described LiNi in the claim 1 to 4
0.5Mn
1.5O
4Preparation methods is characterized in that,
The said room temperature that is cooled to is for cooling to room temperature with the furnace.
9. LiNi
0.5Mn
1.5O
4Material is characterized in that, it is through any described method preparation in the claim 1 to 8, and its tap density is between 2.4g/ml to 2.6g/ml.
10. a lithium ion battery is characterized in that, its positive pole contains the described LiNi of claim 9
0.5Mn
1.5O
4Material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110446440.6A CN102496709B (en) | 2011-12-28 | 2011-12-28 | LiNi0.5Mn1.5O4 material, preparation method thereof and lithium ion battery containing the material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110446440.6A CN102496709B (en) | 2011-12-28 | 2011-12-28 | LiNi0.5Mn1.5O4 material, preparation method thereof and lithium ion battery containing the material |
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| CN103972495A (en) * | 2014-05-16 | 2014-08-06 | 盐城市新能源化学储能与动力电源研究中心 | Preparation method of lithium ion battery positive pole material lithium nickelate manganate |
| CN111943283A (en) * | 2020-08-13 | 2020-11-17 | 松山湖材料实验室 | Positive electrode active material, preparation method thereof, secondary battery positive electrode and lithium battery |
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| CN111943283A (en) * | 2020-08-13 | 2020-11-17 | 松山湖材料实验室 | Positive electrode active material, preparation method thereof, secondary battery positive electrode and lithium battery |
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