CN108376777A - A kind of anode material for lithium-ion batteries and preparation method thereof that surface is modified - Google Patents
A kind of anode material for lithium-ion batteries and preparation method thereof that surface is modified Download PDFInfo
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- CN108376777A CN108376777A CN201810163857.3A CN201810163857A CN108376777A CN 108376777 A CN108376777 A CN 108376777A CN 201810163857 A CN201810163857 A CN 201810163857A CN 108376777 A CN108376777 A CN 108376777A
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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
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- 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
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- 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
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- 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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Abstract
The present invention provides the anode material for lithium-ion batteries and preparation method thereof that a kind of surface is modified, and include the following steps：Oxidant and solvent are configured to certain density detergent, and washing is mixed in base material and detergent, after separation of solid and liquid, drying, sintering, obtain the anode material for lithium-ion batteries of surface modification.Base material of the present invention is Li1+aNixCoyMnzO2.The present invention removes the remaining lithium carbonate of substrate surface and lithium hydroxide by the effect of oxidant；Substrate surface is modified, the structural stability of anode material for lithium-ion batteries is improved；The high temperature shelving performance and cycle performance of lithium ion battery can be improved simultaneously.The method of the present invention is easy to operate, and cost is relatively low, is suitble to large-scale production.
Description
Technical field
The invention belongs to technical field of lithium ion more particularly to a kind of positive electrode and preparation method thereof.
Background technology
More and more wider with the application prospect of lithium ion battery, stratiform nickel-cobalt-manganese ternary material is because its specific capacity is high, cycle
Performance is good, lower-cost advantage, is increasingly becoming the first choice of anode material for lithium-ion batteries.It is learnt by research, stratiform ternary
The valence state of Ni is+divalent in material, and the valence state of Co is+trivalent, and the valence state of Mn is+4 valences.In lithium ion battery charging process, lithium
Ion battery is deviate from from positive electrode interlayer, Ni2+、 Co3+Ion aoxidizes, and valence state increases；And Mn4+The valence state of ion is not
Become, plays the role of rock-steady structure.But since there are excessive lithiums for material surface, the valence state of Mn elements is reduced, so layer
Usually there is part Mn in shape nickel cobalt manganese anode material surface3+Ion, Mn3+Ion is easy to happen disproportionated reaction in the electrolytic solution, raw
At Mn2+Ion and Mn4+Ion causes cycle performance of battery to be deteriorated.Stratiform nickel cobalt manganese anode material considers in sintering process
It volatilizees at high temperature to lithium source, is usually added into excessive lithium source.Studies have found that excessive lithium is easy to be deposited on stratiform nickel cobalt manganese
Positive electrode surface, with the CO in air2And H2O reacts, and is produced in material surface and generates Li2CO3And LiOH.Li2CO3
Battery can be caused to generate serious flatulence, the LiOH and LiPF in electrolyte in charged state6Reaction generates HF, aggravates material table
The dissolving of face manganese element.How improving stratiform nickel cobalt manganese anode material surface texture stability, removing surface residual lithium is to improve
The critical issue of cycle performance of lithium ion battery, storage performance.
It is typically employed in matrix surface and carries out the method for coating modification to improve surface texture stability.Such as Publication No.
The Chinese patent of CN105070907A discloses a kind of nickelic positive electrode and preparation method thereof and lithium ion battery, by base
Body surface bread covers the one or more of magnesium, titanium, zirconium, fluorine, boron, aluminium and phosphate radical, alleviates cleaning solution to substrate material surface structure
It destroys, improves capacity of lithium ion battery and cycle performance.As the Chinese patent of Publication No. CN105958062A disclose lithium from
Sub- nickelic positive electrode of battery polycrystalline and preparation method thereof, by the lithium manganese oxide in base material outer cladding spinel structure,
It reduces material basicity, reduce inflatable degree.But the method for coating substance by introducing other types, matrix cannot be effectively reduced
The Mn on surface3+The concentration of ion stablizes without too big effect the surface texture of matrix itself.And clad and matrix it
Between be easy to be formed new interface, the ionic conductivity on positive electrode surface is reduced, so as to cause high-temperature lithium ion battery holding item
Internal resistance increases under part.
Stratiform nickel cobalt manganese positive electrode Surface L i is removed at present2CO3It is washed with the method generally use of LiOH.Such as publication number
The Chinese patent of CN105070908A discloses a kind of preparation method and lithium ion battery of nickelic positive electrode, with water, ethyl alcohol
The free lithium for washing away nickelic positive electrode remained on surface reduces the lithium content of nickelic positive electrode remained on surface；Coat it simultaneously
His element improves volumetric properties, cycle performance and the high-temperature storage performance of battery.Such as the China of publication number CN107256955A
Patent discloses a kind of nickelic positive electrode of modification lithium-ion battery and preparation method thereof, is washed with water and tin is coating jointly modified
The nickelic positive electrode of lithium ion battery absorbs remaining lithium using tin source, and in one layer of lithium stannate of the Surface Creation of material and oxidation
The compound coating layer of tin improves discharge capacity, first effect, cycle performance and the security performance of battery.Water, ethyl alcohol washing can dissolve
Part residual lithium, but base material material surface after washing is unstable, the lithium on base material surface layer be easy to again in environment
Water atmosphere, carbon dioxide react, and form new remained on surface lithium, cause lithium ion battery under the conditions of high temperature is shelved in battery
Resistance increases, cell thickness increases.
Invention content
In view of this, a kind of preparation method for the anode material for lithium-ion batteries being modified the present invention provides surface, special
Sign is that from certain density detergent washing is mixed, by solid-liquid in base material and detergent by oxidant and solvent configuration
After separation, dry, sintering, the anode material for lithium-ion batteries of surface modification is obtained.Oxidant is weakly acidic in a solvent, with base
Neutralization reaction occurs for the lithium carbonate and lithium hydroxide of material remained on surface, achievees the effect that efficiently to remove the free lithium of substrate surface；
During washing, oxidant carries out oxidation modification to substrate surface, improves the valence state of substrate surface transient metal Mn, is formed steady
Fixed superficial layer improves the structural stability of anode material for lithium-ion batteries；The aqueous solution of oxidant can effectively remove matrix
Surface insulation impurity, the high temperature shelving performance and stable circulation performance for improving lithium ion battery.The method of the present invention is easy to operate,
Cost is relatively low, is suitble to large-scale production.
The present invention provides the anode material for lithium-ion batteries that a kind of surface is modified, which is characterized in that the positive material
Material is made of the superficial layer of base material and base material, and superficial layer is obtained by base material and oxidant reaction, the valence of transition metal in superficial layer
State is higher than the valence state of the transition metal in base material, and superficial layer does not have apparent interfaced barrier with base material.
The base material is Li1+aNixCoyMnzO2, wherein 0≤a≤0.5,0.5≤x ＜ the ＜ z of 1,0≤y≤0.5,0≤
0.5,0 x+y+z≤1 ＜；Preferably, 0≤a≤0.2,0.5≤x ＜ the ＜ z≤0.3 of 1,0≤y≤0.3,0,0 x+y+z≤1 ＜；
It is furthermore preferred that 0≤a≤0.08,0.8≤x ＜ the ＜ z≤0.1 of 1,0≤y≤0.1,0,0 x+y+z≤1 ＜.
The superficial layer is LiNixCoyMnzO2, wherein 0.5≤x ＜ 1,0≤y≤0.5,0 ＜ z≤0.5,0 ＜ x+y+
z≤1；Preferably, 0≤a≤0.2,0.5≤x ＜ the ＜ z≤0.3 of 1,0≤y≤0.3,0,0 x+y+z≤1 ＜；It is furthermore preferred that 0≤
A≤0.08,0.8≤x ＜ the ＜ z≤0.1 of 1,0≤y≤0.1,0,0 x+y+z≤1 ＜.
The detergent includes oxidant and solvent.The oxidant is chlorine dioxide, chlorine monoxide, secondary chlorine
Acid, chlorous acid, chloric acid；Preferably, oxidant is chlorine dioxide, chlorine monoxide；It is furthermore preferred that oxidant is chlorine dioxide.
The solution be water, ethyl alcohol, acetone it is one or more.
The mass ratio of the oxidant and solvent is (0.0001~0.2):1；Preferably, the quality of oxidant and solvent
Than for (0.0001~0.1):1；It is furthermore preferred that the mass ratio of oxidant and solvent is (0.0005~0.02):1.
In the solvent, water, ethyl alcohol, acetone mass ratio be 1：(0~0.5):(0~0.2)；Preferably, water, second
Alcohol, acetone mass ratio be 1：(0~0.1):(0~0.1)；It is furthermore preferred that the mass ratio of water, ethyl alcohol, acetone is 1：(0~
0.05):(0~0.01).
The mass ratio of the base material and detergent is 1：(0.01~5)；Preferably, the mass ratio of base material and detergent is
1：(0.1~2)；It is furthermore preferred that the mass ratio of base material and detergent is 1：(0.2~1).
The wash temperature is 10~95 DEG C；Preferably, wash temperature is 30~70 DEG C；It is furthermore preferred that wash temperature
It is 40~60 DEG C.
The wash time is 0.05~12h；Preferably, wash time is 0.1~3h；It is furthermore preferred that wash time
For 0.1~1h.
The sintering temperature is 120~450 DEG C；Preferably, sintering temperature is 250~450 DEG C；It is furthermore preferred that sintering
Temperature is 300~450 DEG C.
The sintering time be 0.5~for 24 hours；Preferably, sintering time is 0.5~16h；It is furthermore preferred that sintering time
For 0.5~8h.
The method of the present invention is easy to operate, and cost is relatively low, is suitble to large-scale production, can significantly improve lithium ion battery
Security performance, storage performance and cycle performance.
Description of the drawings
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technology description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
The embodiment of invention for those of ordinary skill in the art without creative efforts, can also basis
The attached drawing of offer obtains other attached drawings.
Fig. 1 is the cycle performance comparison curves of lithium ion battery in the embodiment of the present invention 11 and comparative example 11.
Specific implementation mode
In order to further illustrate the present invention, with reference to embodiments to a kind of lithium ion that surface is modified provided by the invention
Cell positive material and preparation method thereof is described in detail, but cannot be understood as limiting the scope of the present invention.
Embodiment 1
Chlorine dioxide and water are according to mass ratio 0.0005：1 configuration is from detergent, Li1.03Ni0.8Co0.1Mn0. 1O2With wash
Agent is washed according to mass ratio 1：1 is mixed washing (wash temperature be 45 DEG C, wash time 0.5h), by being separated by solid-liquid separation, doing
After dry, sintering (sintering temperature be 300 DEG C, sintering time 5h), the anode material for lithium-ion batteries of surface modification is obtained.
Embodiment 2
Chlorine dioxide and water are according to mass ratio 0.001：1 configuration is from detergent, Li1.05Ni0.9Co0.02Mn0.08O2With wash
Agent is washed according to mass ratio 1：0.5 is mixed washing (wash temperature be 60 DEG C, wash time 1h), by being separated by solid-liquid separation, doing
After dry, sintering (sintering temperature be 350 DEG C, sintering time 8h), the anode material for lithium-ion batteries of surface modification is obtained.
Embodiment 3
Chlorine monoxide, water, ethyl alcohol and acetone are according to mass ratio 0.005：1：0.02：0.01 configuration from detergent,
Li1.02Ni0.9Co0.05Mn0.05O2With detergent according to mass ratio 1：1 is mixed washing, and (wash temperature is 55 DEG C, wash time
For 0.5h), after separation of solid and liquid, drying, sintering (sintering temperature be 400 DEG C, sintering time 6h), obtain surface modification
Anode material for lithium-ion batteries.
Embodiment 4
Chlorine dioxide, water, ethyl alcohol and acetone are according to mass ratio 0.001：1：0.01：0.005 configuration from detergent,
Li1.05Ni0.8Co0.1Mn0.1O2With detergent according to mass ratio 1：0.5 is mixed washing, and (wash temperature is 50 DEG C, wash time
For 1h), after separation of solid and liquid, drying, sintering (sintering temperature be 4 50 DEG C, sintering time 5h), obtain surface modification
Anode material for lithium-ion batteries.
Embodiment 5
Chlorous acid, water and ethyl alcohol are according to mass ratio 0.01：1：0.05 configuration is from detergent, Li1.045Ni0.6Co0.2Mn0.2O2With detergent according to mass ratio 1：0.5 is mixed washing (wash temperature be 65 DEG C, wash time 2h), warp
After crossing separation of solid and liquid, drying, sintering (sintering temperature be 500 DEG C, sintering time 12h), the lithium-ion electric of surface modification is obtained
Pond positive electrode.
Embodiment 6
Chlorine dioxide, water and acetone are according to mass ratio 0.002：1：0.001 configuration is from detergent, LiNi0.8Co0.1Mn0.1O2With detergent according to mass ratio 1：0.3 is mixed washing, and (wash temperature is 55 DEG C, wash time is
0.4h), after separation of solid and liquid, drying, sintering (sintering temperature be 400 DEG C, sintering time 3h), the lithium of surface modification is obtained
Ion battery positive electrode.
Embodiment 7
Chlorine monoxide and water are according to mass ratio 0.01：1 configuration is from detergent, Li1.05Ni0.9Mn0.1O2It is pressed with detergent
According to mass ratio 1：0.7 be mixed washing (wash temperature is 50 DEG C, wash time is 0. 3h), by separation of solid and liquid, drying,
After sintering (sintering temperature be 380 DEG C, sintering time 10h), the anode material for lithium-ion batteries of surface modification is obtained.
Embodiment 8
Chlorine dioxide, water and ethyl alcohol are according to mass ratio 0.01：1：0.02 configuration is from detergent, Li1.02N i0.8Mn0.2O2
With detergent according to mass ratio 1：0.2 is mixed washing (wash temperature be 55 DEG C, wash time 0.25h), by solid-liquid
After separation, dry, sintering (sintering temperature be 420 DEG C, sintering time 3h), the lithium ion cell positive material of surface modification is obtained
Material.
Embodiment 9
Chlorine dioxide, water, ethyl alcohol and acetone are according to mass ratio 0.0005：1：0.01：0.005 configuration from detergent,
Li1.06Ni0.8Co0.1Mn0.1O2With detergent according to mass ratio 1：0.8 is mixed washing, and (wash temperature is 45 DEG C, wash time
For 0.5h), after separation of solid and liquid, drying, sintering (sintering temperature be 400 DEG C, sintering time 5h), obtain surface modification
Anode material for lithium-ion batteries.
Embodiment 10
Hypochlorous acid and water are according to mass ratio 0.1：1 configuration is from detergent, Li1.03Ni0.6Co0.2Mn0.2O2It is pressed with detergent
According to mass ratio 1：0.2 is mixed washing (wash temperature is 50 DEG C, wash time is 1 h), by separation of solid and liquid, drying, burning
After knot (sintering temperature be 450 DEG C, sintering time 9h), the anode material for lithium-ion batteries of surface modification is obtained.
Comparative example 1~10
Base material described in Examples 1 to 10 is respectively comparative example 1~10.
The remaining lithium content and pH value of anode material for lithium-ion batteries made from testing example 1~10, test and comparison example 1
~10 remaining lithium content and pH value, comparison result are as shown in table 1.
The remaining lithium content and pH value of positive electrode in 1 Examples 1 to 10 of table and comparative example 1~10
| Remaining lithium content (%) | PH value | |
| Embodiment 1 | 0.032 | 11.52 |
| Comparative example 1 | 0.385 | 11.91 |
| Embodiment 2 | 0.021 | 11.58 |
| Comparative example 2 | 0.415 | 12.01 |
| Embodiment 3 | 0.039 | 11.65 |
| Comparative example 3 | 0.363 | 12.06 |
| Embodiment 4 | 0.022 | 11.47 |
| Comparative example 4 | 0.285 | 11.93 |
| Embodiment 5 | 0.078 | 11.39 |
| Comparative example 5 | 0.210 | 11.75 |
| Embodiment 6 | 0.012 | 11.38 |
| Comparative example 6 | 0.156 | 11.64 |
| Embodiment 7 | 0.059 | 11.60 |
| Comparative example 7 | 0.478 | 11.93 |
| Embodiment 8 | 0.035 | 11.67 |
| Comparative example 8 | 0.440 | 11.92 |
| Embodiment 9 | 0.017 | 11.56 |
| Comparative example 9 | 0.302 | 11.94 |
| Embodiment 10 | 0.052 | 11.50 |
| Comparative example 10 | 0.312 | 11.78 |
As shown in Table 1, method provided by the invention can reduce the surface residual lithium in lithium ion anode material matrix and contain
Amount, can reduce the pH value of lithium ion anode material.
Embodiment 11~20
By anode material for lithium-ion batteries obtained in embodiment 2~10, electrically conductive graphite, acetylene black, Kynoar and
N-Methyl pyrrolidone is at normal temperatures and pressures according to mass ratio 93：0.15：0.15：0.4：20 0 are mixed to form slurry, and washing applies
It overlays on aluminium foil surface and positive plate is made.Above-mentioned pole piece is dried at 120 DEG C, according to 2.8g/cm-1Compacted density roll-in after,
It is cut into rectangular anode pole piece, the cathode pole piece of corresponding size is made using carbonaceous mesophase spherules as cathode, with 1mol/L's
LiPF6Ethylene carbonate (E C) and dimethyl carbonate (DMC) solution be electrolyte, the volume ratio of wherein EC and DMC are 1：1,
Then soft bag lithium ionic cell is assembled into the glove box full of argon gas.
Comparative example 11~20
By matrix, electrically conductive graphite, acetylene black, Kynoar and the N-Methyl pyrrolidone described in comparative example 1~10
At normal temperatures and pressures according to mass ratio 93：0.15：0.15：0.4：200 are mixed to form slurry, and washing is made coated in aluminium foil surface
Positive plate.Above-mentioned pole piece is dried at 120 DEG C, according to 2.8g/cm-1Compacted density roll-in after, be cut into it is rectangular just
The cathode pole piece of corresponding size is made using carbonaceous mesophase spherules as cathode for pole pole piece, with the LiPF of 1mol/L6Ethylene carbonate
(EC) and dimethyl carbonate (DMC) solution is electrolyte, and the volume ratio of wherein EC and DMC are 1：1, then in the hand full of argon gas
Soft bag lithium ionic cell is assembled into casing.
The present invention tests 60 DEG C of high-temperature lithium ion battery in embodiment 11~20 and comparative example 11~20 and shelves 7 days
Internal resistance variation and thickness change, the present invention test 200 times of lithium ion battery in embodiment 11~20 and comparative example 11~20
Conservation rate is recycled, the results are shown in Table 2.
The expansion rate of lithium ion battery and 200 cycle conservation rates in 2 embodiment 11~20 of table and comparative example 11~20
Fig. 1 is 500 weeks specific discharge capacity comparison curves of cycle of embodiment 11 and the lithium ion battery in comparative example 11.Its
Middle curve 1 is the cycle performance curve of the lithium ion battery of embodiment 11, and battery capacity conservation rate is after recycling within 500 weeks
93.7%.Curve 2 is the cycle performance curve of the lithium ion battery of comparative example 11, and battery capacity conservation rate is after recycling within 350 weeks
78.6%, battery charging and discharging degradation, cycle life is less than 500 weeks.As shown in Figure 1, it is lithium ion battery with embodiment 11
The cycle performance of lithium ion battery that positive electrode makes is more excellent.
The above is only a preferred embodiment of the present invention, it is noted that for the ordinary skill people of the art
For member, various improvements and modifications may be made without departing from the principle of the present invention, these improvements and modifications are also answered
It is considered as protection scope of the present invention.
Claims (9)
1. a kind of preparation method for the anode material for lithium-ion batteries that surface is modified, which is characterized in that oxidant and solvent configuration
At certain density detergent, washing is mixed in base material and detergent, after separation of solid and liquid, drying, sintering, obtains table
The modified anode material for lithium-ion batteries with superficial layer in face, the oxidant are chlorine dioxide, chlorine monoxide, secondary chlorine
Acid, chlorous acid, chloric acid.The solution be water, ethyl alcohol, acetone it is one or more.The base material is Li1+ aNixCoyMnzO2, the superficial layer is LiNixCoyMnzO2, wherein 0≤a≤0.5,0.5≤x ＜ the ＜ z of 1,0≤y≤0.5,0
≤ 0.5,0 x+y+z≤1 ＜.
2. the preparation method for the anode material for lithium-ion batteries that surface according to claim 1 is modified, which is characterized in that oxygen
The mass ratio of agent and solvent is (0.0001~0.2):1；Water, ethyl alcohol, acetone mass ratio be 1：(0~0.5):(0~
0.2)。
3. the preparation method for the anode material for lithium-ion batteries that surface according to claim 1 is modified, which is characterized in that base
The mass ratio of material and detergent is 1：(0.01~5).
4. the preparation method for the anode material for lithium-ion batteries that surface according to claim 1 is modified, which is characterized in that wash
The temperature washed is 10~95 DEG C.
5. the preparation method for the anode material for lithium-ion batteries that surface according to claim 1 is modified, which is characterized in that wash
The time washed is 0.05~12h.
6. the preparation method for the anode material for lithium-ion batteries that surface according to claim 1 is modified, which is characterized in that burn
The temperature of knot is 120~450 DEG C.
7. the preparation method for the anode material for lithium-ion batteries that surface according to claim 1 is modified, which is characterized in that burn
The time of knot be 0.5~for 24 hours.
8. the preparation method for the anode material for lithium-ion batteries that surface according to claim 1 is modified, which is characterized in that make
The method that surface is carried out to base material under liquid-phase condition with oxidant.
9. the anode material for lithium-ion batteries that a kind of surface is modified, which is characterized in that prepare surface by above-mentioned preparation method and be modified
Positive electrode.
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113394390A (en) * | 2020-03-11 | 2021-09-14 | 中国石油化工股份有限公司 | Method for reducing alkali residue of high-nickel ternary material of lithium ion battery |
| CN113562781A (en) * | 2021-07-26 | 2021-10-29 | 赣州启源新材料有限公司 | Modification method of high-nickel lithium ion battery positive electrode material |
| CN114300674A (en) * | 2021-12-22 | 2022-04-08 | 广州大学 | LiNi0.8Co0.1Mn0.1O2Surface modification method of ternary cathode material |
| CN114682575A (en) * | 2022-05-31 | 2022-07-01 | 宜宾锂宝新材料有限公司 | Method for reducing residual alkali on surface of high-nickel anode material, obtained material and application |
| CN114682567A (en) * | 2022-05-31 | 2022-07-01 | 宜宾锂宝新材料有限公司 | Wet surface treatment method of high-nickel anode material, obtained material and application |
| CN114956206A (en) * | 2022-05-31 | 2022-08-30 | 宜宾锂宝新材料有限公司 | Pre-oxidation method of high-nickel ternary material precursor and obtained precursor material |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113394390A (en) * | 2020-03-11 | 2021-09-14 | 中国石油化工股份有限公司 | Method for reducing alkali residue of high-nickel ternary material of lithium ion battery |
| CN113394390B (en) * | 2020-03-11 | 2024-05-17 | 中国石油化工股份有限公司 | Method for reducing residual alkali of high-nickel ternary material of lithium ion battery |
| CN113562781A (en) * | 2021-07-26 | 2021-10-29 | 赣州启源新材料有限公司 | Modification method of high-nickel lithium ion battery positive electrode material |
| CN114300674A (en) * | 2021-12-22 | 2022-04-08 | 广州大学 | LiNi0.8Co0.1Mn0.1O2Surface modification method of ternary cathode material |
| CN114300674B (en) * | 2021-12-22 | 2023-11-21 | 广州大学 | LiNi 0.8 Co 0.1 Mn 0.1 O 2 Surface modification method of ternary positive electrode material |
| CN114682575A (en) * | 2022-05-31 | 2022-07-01 | 宜宾锂宝新材料有限公司 | Method for reducing residual alkali on surface of high-nickel anode material, obtained material and application |
| CN114682567A (en) * | 2022-05-31 | 2022-07-01 | 宜宾锂宝新材料有限公司 | Wet surface treatment method of high-nickel anode material, obtained material and application |
| CN114956206A (en) * | 2022-05-31 | 2022-08-30 | 宜宾锂宝新材料有限公司 | Pre-oxidation method of high-nickel ternary material precursor and obtained precursor material |
| CN114956206B (en) * | 2022-05-31 | 2023-12-08 | 宜宾锂宝新材料有限公司 | Pre-oxidation method of high-nickel ternary material precursor and precursor material obtained by pre-oxidation method |
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Application publication date: 20180807 |