CN108305993A - A kind of blended anode material and the lithium ion battery comprising the material - Google Patents
A kind of blended anode material and the lithium ion battery comprising the material Download PDFInfo
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- CN108305993A CN108305993A CN201711272975.XA CN201711272975A CN108305993A CN 108305993 A CN108305993 A CN 108305993A CN 201711272975 A CN201711272975 A CN 201711272975A CN 108305993 A CN108305993 A CN 108305993A
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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
- H01M4/362—Composites
- H01M4/364—Composites as mixtures
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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
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/052—Li-accumulators
- H01M10/0525—Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
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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
- H01M4/485—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of mixed oxides or hydroxides for inserting or intercalating light metals, e.g. LiTi2O4 or LiTi2OxFy
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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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- 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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- 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 present invention relates to a kind of blended anode material and include the lithium ion battery of the material.The blended anode material is the mixing material of high nickel hydroxide active material and low nickel hydroxide active material；The median of wherein high nickel hydroxide active material is less than or equal to 15 μm, and a size of microcrystal is 1.0~10 μm；The median of low nickel hydroxide active material is greater than or equal to 1 μm, and a size of microcrystal is 0.5~5.0 μm.Blended anode material powder second particle made of a monodispersed crystal grain or a crystal grain accumulation forms.Using the lithium ion battery of blended anode material provided by the invention, there is good high temperature cyclic performance and security feature.
Description
Technical field
The present invention relates to a kind of blended anode materials, and the lithium ion battery comprising the material, belong to lithium ion battery
Technical field.
Background technology
Outstanding advantages of lithium ion battery is because of high working voltage, high-energy density, long circulation life, in new-energy automobile
There is wide application space with power battery aspect.With petroleum resources increasingly depleted, environmental pollution aggravates increasingly, greatly develops
New-energy automobile industry, to reduce to the dependence of fossil energy, reduce emission from vehicles, it has also become majority state in the world
Policy is known together.At the same time, people also proposed increasingly higher demands to the performance of used in new energy vehicles power lithium-ion battery,
Such as higher energy density, better cycle life, more superior security feature etc..Nickel-cobalt-manganese ternary material is representative
Layered Structural Positive Electrode Materials are a kind of positive electrodes for being now widely used for lithium ion battery.Its advantage is that specific capacity is larger,
Voltage platform is high, good cycle, and due in material cobalt content it is relatively low, so cost is substantially less than cobalt acid lithium material, peace
Full performance is significantly better than cobalt acid lithium material, therefore becomes a kind of outstanding power lithium-ion battery positive electrode.
In general nickel-cobalt-manganese ternary material, when nickel content is higher, the specific capacity of material is higher, but structural stability compared with
Difference, cycle performance and security feature are bad；When nickel content is relatively low, material specific capacity is relatively low, but structural stability is preferable, because
This has preferable cycle and security performance.The specific capacity and security feature of positive electrode are also related with its pattern.General material
Crystallite dimension and median it is smaller, specific surface area is bigger, and specific capacity is higher, but security performance is relatively poor；Crystallite dimension
Bigger with median, specific surface area is smaller, and specific capacity is lower, but security performance is relatively preferable.
It is distinguished from pattern, nickel-cobalt-manganese ternary material currently on the market has little crystal grain aggregate ternary material and big crystal grain
Two class of ternary material.Wherein big crystal grain ternary material has preferable high temperature cyclic performance and security feature, but due to material crystalline substance
Grain is larger, and usual high rate during charging-discharging is poor, is difficult to power battery field.
In order to improve the performance of positive electrode, different materials can be used in mixed way.It is different in blended anode material
Type, physical index, mixed proportion of component etc. have significant impact to the performance of blended anode material.Chinese patent
A kind of lithium ferric manganese phosphate material by the nickel-cobalt-manganese ternary material of high power capacity and high safety is disclosed in 201410105350.4 to answer
The blended anode material matched has played the complementary advantage of two kinds of materials, improves the comprehensive performance of positive electrode, make it have compared with
Good mass energy density and security performance.But the density of lithium ferric manganese phosphate material itself is relatively low, the volume of blended anode material
Energy density compares nickel-cobalt-manganese ternary material and has no improvement.In Chinese patent 201210505675.2, disclose a kind of by cobalt acid
The positive electrode that lithium system active material is mixed with nickel-cobalt-manganese ternary material, but cobalt acid lithium system active material contains in such material
Amount is higher, is not suitable for power battery anode material.
Invention content
In view of the above-mentioned problems, the object of the invention is to provide a kind of blended anode material, and the lithium comprising the positive electrode
Ion battery.Blended anode material provided by the invention is mixed by high nickel hydroxide active material A and low nickel hydroxide active material B,
Wherein, a size of microcrystal of A and median are larger, have a higher capacity, a size of microcrystal and median of B compared with
Small, security performance is more prominent, and two kinds of material matings can play respective performance advantage.Make the blended anode material simultaneously
Have the characteristics that high power capacity, high-pressure solid, high security, in addition use the lithium ion battery of the blended anode material, has higher
Pole piece compaction density, under 4.2V voltages used above, have good high temperature cyclic performance and security performance.
To achieve the goals above, the specific technical solution of the present invention is as described below：
A kind of blended anode material, the high nickel hydroxide active material A for being 0.8~20 by weight ratio are mixed with low nickel hydroxide active material B
It forms；
The high nickel hydroxide active material A general formulas are LiαNixCoyMa(1-x-y)O2, wherein 0.95≤α≤1.10,0.5≤x≤
0.85,0≤y≤0.45,1-x-y ＞ 0, at least one of Ma Al, Cr, Mg, Mn, Mo, Nb, Ti, V, W, Zr, the middle position of A
4 μm≤D50≤15 μm of grain size；
The low nickel hydroxide active material B general formulas are LiβNizConMb(1-z-n)O2, wherein 0.95≤β≤1.10,0.25≤z≤
0.45,0≤n≤0.5,1-z-n ＞ 0, at least one of Mb Al, Cr, Mg, Mn, Mo, Nb, Ti, V, W, Zr, the middle position grain of B
1 μm≤D50≤8 μm of diameter.
The preparation of the blended anode material includes two ways：One is A and B is directly mixed, it to be used for battery production；
Another kind be the precursor A of the A precursor B of B ', ' and lithium source high temperature sintering after mixing are obtained into the mixture of A and B, then
For battery production.
In above-mentioned blended anode material, a size of microcrystal of the high nickel hydroxide active material A is 1.0~10 μm.
In above-mentioned blended anode material, a size of microcrystal of the low nickel hydroxide active material B is 0.5~5.0 μm.
In above-mentioned blended anode material, the weight ratio A/B of the high nickel hydroxide active material A and low nickel hydroxide active material B is preferably
1.0~10.
The charge cutoff voltage of the blended anode material is greater than or equal to 4.2V.
The present invention also provides a kind of lithium ion battery including above-mentioned blended anode material, the blended anode material is made
For the positive active material of the lithium ion battery.
Further, the lithium ion battery further includes positive plate, negative plate, is interval between positive plate and negative plate
Diaphragm and electrolyte, the positive plate include plus plate current-collecting body and coated in the positive electrode active material on the plus plate current-collecting body
Matter layer, the positive electrode active material layer further include binder and conductive agent in addition to positive active material.
The key of the present invention is selection and the proportioning of material, and positive electrode is prepared well known to those skilled in the art's use
Method its preparation can be realized.Compared with the existing technology, blended anode material provided by the invention has high power capacity, high pressure
In fact, the characteristics of high security, using the lithium ion battery of the blended anode material, there is good high temperature cyclic performance and safety
Performance and higher mass energy density and volume energy density, can be applied to 4.2V or more occasions.
Description of the drawings
Fig. 1 is 45 DEG C of high temperature cyclic performance figures of one lithium ion battery of embodiment one and comparative example.
Fig. 2 is positive electrode DSC curve at 4.3V used in one lithium ion battery of embodiment one and comparative example.
Specific implementation mode
The present invention is described in further detail below by specific embodiment, but this is not a limitation of the present invention, ability
Technical staff's basic thought according to the present invention in domain, various modifications may be made and improves, without departing from the base of the present invention
This thought is all within the scope of the present invention.
Embodiment one
The present embodiment provides a kind of blended anode material, positive electrode LiNi0.6Co0.2Mn0.2O2With
LiNi0.34Co0.33Mn0.33O2Mixing material.Wherein, LiNi0.6Co0.2Mn0.2O2D50=10 μm of median, a crystal grain
Grain size is 1~6 μm；LiNi0.34Co0.33Mn0.33O2D50=3.5 μm of median, size of microcrystal is 0.5~4 μm.
LiNi0.6Co0.2Mn0.2O2With LiNi0.34Co0.33Mn0.33O2Mass ratio be 10:1.
Above-mentioned positive electrode is in soft-package battery, and at 3.0~4.3V, 45 DEG C recycle 300 weeks, and capacity retention ratio is
92.5%, cyclic curve is as shown in Figure 1.
The DSC test results of positive electrode powder in the charge state, can characterize the thermal stability of positive electrode.Anode
The thermal stability of material is better, also better using the lithium ion battery security feature of the material.The blended anode material is in 4.3V
DSC curve under Charging state is shown in Fig. 2, it is seen that originally applying blended anode material described in example one has preferable thermal stability.
Embodiment two
The present embodiment provides a kind of blended anode material, positive electrode LiNi0.85Co0.1Al0.05O2With
Li1.1Ni0.45Co0.20Mn0.32Zr0.03O2Mixing material.Wherein, LiNi0.85Co0.1Al0.05O2D50=10 μm of median,
Size of microcrystal is 1~6 μm；Li1.1Ni0.45Co0.20Mn0.32Zr0.03O2D50=4 μm of median, a size of microcrystal
It is 0.5~3 μm.LiNi0.85Co0.1Al0.05O2With Li1.1Ni0.45Co0.20Mn0.32Zr0.03O2Mass ratio be 10:1.
Above-mentioned blended anode material is in soft-package battery, and at 3.0~4.2V, 45 DEG C recycle 300 weeks, and capacity retention ratio is
95%.
Embodiment three
The present embodiment provides a kind of blended anode material, positive electrode Li0.95Ni0.50Co0.25Mn0.24Ti0.01O2With
Li1.1Ni0.50Mn0.5O2Mixing material.Wherein, Li0.95Ni0.50Co0.25Mn0.24Ti0.01O2D50=8 μm of median, one
Secondary size of microcrystal is 1~5 μm；Li1.1Ni0.50Mn0.5O2D50=3 μm of median, size of microcrystal is 0.5~2.5 μm.
Li0.95Ni0.50Co0.25Mn0.24Ti0.01O2With Li1.1Ni0.50Mn0.5O2Mass ratio be 2:1.
Above-mentioned positive electrode is in soft-package battery, and at 3.0~4.4V, 45 DEG C recycle 300 weeks, and capacity retention ratio is
90%.
Example IV
The present embodiment provides a kind of blended anode material, positive electrode LiNi0.68Co0.15Mn0.15Mg0.02O2With
LiNi0.25Co0.50Mn0.24Nb0.01O2Mixing material.Wherein, LiNi0.68Co0.15Mn0.15Mg0.02O2Median D50=8
μm, a size of microcrystal is 1~5 μm；LiNi0.25Co0.50Mn0.24Nb0.01O2D50=3 μm of median, a size of microcrystal
It is 0.5~2.5 μm.LiNi0.68Co0.15Mn0.15Mg0.02O2With LiNi0.25Co0.50Mn0.24Nb0.01O2Mass ratio be 4:1.
Above-mentioned positive electrode is in soft-package battery, and at 3.0~4.3V, 45 DEG C recycle 300 weeks, and capacity retention ratio is
92%.
Embodiment five
The present embodiment provides a kind of blended anode material, positive electrode Li1.1Ni0.50Co0.45Mn0.04W0.01O2With
LiNi0.40Co0.20Mn0.40O2Mixing material.Wherein, Li1.1Ni0.50Co0.45Mn0.04W0.01O2D50=4 μm of median,
Size of microcrystal is 1~4 μm；LiNi0.40Co0.20Mn0.40O2D50=8 μm of median, size of microcrystal is 1~5 μ
m。Li1.1Ni0.50Co0.45Mn0.04W0.01O2With LiNi0.40Co0.20Mn0.40O2Mass ratio be 0.8:1.
Above-mentioned positive electrode is in soft-package battery, and at 3.0~4.4V, 45 DEG C recycle 300 weeks, and capacity retention ratio is
89%.
Embodiment six
The present embodiment provides a kind of blended anode material, positive electrode Li1.05Ni0.70Co0.15Mn0.13Mo0.02O2With
LiNi0.34Co0.33Mn0.30Cr0.03O2Mixing material.Wherein, Li1.05Ni0.70Co0.15Mn0.13Mo0.02O2Median D50
=11 μm, a size of microcrystal is 1~8 μm；LiNi0.34Co0.33Mn0.30Cr0.03O2D50=3 μm of median, a crystal grain
Grain size is 1~2 μm.Li1.05Ni0.70Co0.15Mn0.13Mo0.02O2With LiNi0.34Co0.33Mn0.30Cr0.03O2Mass ratio be 7:1.
Above-mentioned positive electrode is in soft-package battery, and at 3.0~4.2V, 45 DEG C recycle 300 weeks, and capacity retention ratio is
91%.
Embodiment seven
The present embodiment provides a kind of blended anode material, positive electrode LiNi0.70Co0.15Mn0.15O2With
Li1.07Ni0.30Co0.40Mn0.28V0.02O2Mixing material.Wherein, LiNi0.70Co0.15Mn0.15O2Median D50=12 μ
M, a size of microcrystal are 1~8 μm；Li1.07Ni0.30Co0.40Mn0.28V0.02O2D50=3.5 μm of median, a crystal grain
Grain size is 1~3 μm.LiNi0.70Co0.15Mn0.15O2With Li1.07Ni0.30Co0.40Mn0.28V0.02O2Mass ratio be 6:1.
Above-mentioned positive electrode is in soft-package battery, and at 3.0~4.2V, 45 DEG C recycle 300 weeks, and capacity retention ratio is
93%.
Embodiment eight
The present embodiment provides a kind of blended anode material, positive electrode LiNi0.65Co0.20Mn0.15O2With
LiNi0.34Co0.33Mn0.33O2Mixing material.Wherein, LiNi0.65Co0.20Mn0.15O2D50=10 μm of median, a para-crystal
Grain grain size is 1~4 μm；LiNi0.34Co0.33Mn0.33O2D50=3.5 μm of median, size of microcrystal is 0.5~4 μm.
LiNi0.65Co0.20Mn0.15O2With LiNi0.34Co0.33Mn0.33O2Mass ratio be 5:1.
Above-mentioned positive electrode is in soft-package battery, and at 3.0~4.2V, 45 DEG C recycle 300 weeks, and capacity retention ratio is
94%.
Embodiment nine
The present embodiment provides a kind of blended anode material, positive electrode LiNi0.5Co0.3Mn0.2O2With
LiNi0.3Co0.4Mn0.3O2Mixing material.Wherein, LiNi0.5Co0.3Mn0.2O2D50=7 μm of median, a crystal grain grain
Diameter is 2~10 μm；LiNi0.3Co0.4Mn0.3O2D50=3.5 μm of median, size of microcrystal is 0.5~4 μm.
LiNi0.5Co0.3Mn0.2O2With LiNi0.3Co0.4Mn0.3O2Mass ratio be 1:1.
Above-mentioned positive electrode is in soft-package battery, and at 3.0~4.2V, 45 DEG C recycle 300 weeks, and capacity retention ratio is
96%.
Embodiment ten
The present embodiment provides a kind of blended anode material, positive electrode LiNi0.88Co0.09Al0.03O2With
LiNi0.33Co0.34Mn0.33O2Mixing material.Wherein, LiNi0.88Co0.09Al0.03O2D50=15 μm of median, a para-crystal
Grain grain size is 1~2 μm；LiNi0.33Co0.34Mn0.33O2D50=7 μm of median, size of microcrystal is 0.5~1.5 μm.
LiNi0.88Co0.09Al0.03O2With LiNi0.33Co0.34Mn0.33O2Mass ratio be 4:1.
Above-mentioned positive electrode is in soft-package battery, and at 3.0~4.2V, 45 DEG C recycle 300 weeks, and capacity retention ratio is
92%.
Embodiment 11
The present embodiment provides a kind of blended anode material, positive electrode LiNi0.95Al0.05O2With
LiNi0.33Co0.34Mn0.33O2Mixing material.Wherein, LiNi0.95Al0.05O2D50=12 μm of median, a crystal grain grain
Diameter is 1~2 μm；LiNi0.33Co0.34Mn0.33O2D50=7 μm of median, size of microcrystal is 0.5~1.5 μm.
LiNi0.95Al0.05O2With LiNi0.33Co0.34Mn0.33O2Mass ratio be 2:1.
Above-mentioned positive electrode is in soft-package battery, and at 3.0~4.2V, 45 DEG C recycle 300 weeks, and capacity retention ratio is
88%.
Comparative example one
This comparative example provides a kind of blended anode material, positive electrode LiNi0.6Co0.2Mn0.2O2With
LiNi0.34Co0.33Mn0.33O2Mixing material.What is different from the first embodiment is that wherein, LiNi0.6Co0.2Mn0.2O2Middle position grain
D50=10 μm of diameter, a size of microcrystal are 0.3~2 μm；LiNi0.34Co0.33Mn0.33O2D50=5 μm of median, once
Size of microcrystal is 0.5~1.5 μm.It is other identical as embodiment one, it repeats no more.
Above-mentioned positive electrode is in soft-package battery, and at 3.0~4.3V, 45 DEG C recycle 300 weeks, 1 institute of data such as Fig. 1 and table
Show, one capacity retention ratio of embodiment is 93%, and one capacity retention ratio of comparative example is 79%, is obviously improved using the technical program
The cycle performance of soft-package battery.
In addition, DSC curve of the blended anode material under 4.3V Charging states is shown in Fig. 2 and table 1.Embodiment one goes out peak position
It is 262 DEG C, 323 DEG C to go out peak temperature respectively with maximum, hence it is evident that is higher than 200 DEG C and 312 DEG C of comparative example one, so high-volume heat reduces
Half significantly improves the security performance of battery.
The 45 DEG C of high temperature cyclic performances and the DSC data pair at 4.3V of 1. embodiment one of table and one lithium ion battery of comparative example
Compare result
Claims (9)
1. a kind of blended anode material, by weight ratio for 0.8~20 high nickel hydroxide active material A and low nickel hydroxide active material B is mixed and
At；
The high nickel hydroxide active material A general formulas are LiαNixCoyMa(1-x-y)O2, wherein 0.95≤α≤1.10,0.5≤x≤0.85,0
≤ y≤0.45,1-x-y ＞ 0, at least one of Ma Al, Cr, Mg, Mn, Mo, Nb, Ti, V, W, Zr, 4 μm of the median of A
≤D50≤15μm；
The low nickel hydroxide active material B general formulas are LiβNizConMb(1-z-n)O2, wherein 0.95≤β≤1.10,0.25≤z≤0.45,0
≤ n≤0.5,1-z-n ＞ 0, at least one of Mb Al, Cr, Mg, Mn, Mo, Nb, Ti, V, W, Zr, 1 μm of the median of B
≤D50≤8μm。
2. a kind of blended anode material as described in claim 1, which is characterized in that the blended anode material is by nickelic work
Property substance A and low nickel hydroxide active material B be directly mixed to get.
3. a kind of blended anode material as described in claim 1, which is characterized in that the blended anode material is by nickelic work
The precursor A of the property substance A precursor B of low nickel hydroxide active material B ', ' and the lithium source A's that high temperature sintering obtains after mixing and B
Mixture.
4. a kind of blended anode material as described in claim 1, which is characterized in that a para-crystal of the high nickel hydroxide active material A
Grain grain size is 1.0~10 μm.
5. a kind of blended anode material as described in claim 1, which is characterized in that a para-crystal of the low nickel hydroxide active material B
Grain grain size is 0.5~5.0 μm.
6. a kind of blended anode material as described in claim 1, which is characterized in that the high nickel hydroxide active material A lives with low nickel
Property substance B weight ratio A/B be 1.0~10.
7. a kind of blended anode material as described in claim 1, which is characterized in that the charge cutoff of the blended anode material
Voltage is greater than or equal to 4.2V.
8. a kind of lithium ion battery, including claim 1-7 any one of them blended anode materials, the blended anode material
Positive active material as the lithium ion battery.
9. a kind of lithium ion battery as claimed in claim 8, which is characterized in that the lithium ion battery further include positive plate,
Negative plate, the diaphragm and electrolyte being interval between positive plate and negative plate, the positive plate includes plus plate current-collecting body and painting
The positive electrode active material layer on the plus plate current-collecting body is overlayed on, the positive electrode active material layer further includes in addition to positive active material
Binder and conductive agent.
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| CN109524642A (en) * | 2018-10-23 | 2019-03-26 | 桑顿新能源科技有限公司 | A kind of mixing tertiary cathode material and preparation method thereof |
| CN109524642B (en) * | 2018-10-23 | 2022-01-25 | 桑顿新能源科技有限公司 | Mixed ternary cathode material and preparation method thereof |
| WO2022161374A1 (en) * | 2021-01-26 | 2022-08-04 | 蜂巢能源科技股份有限公司 | Positive electrode plate and lithium ion battery comprising same |
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